diff --git a/README.md b/README.md
index 8682b0a69..45333a2cf 100644
--- a/README.md
+++ b/README.md
@@ -1,74 +1,37 @@
 # Front End Nanodegree Program
 
-General Front End Nanodegree Content Resources
+Front End Nanodegree Content & Project Resources
 
 ## Table of Contents
 
-* [Repo](#repo)
 * [Projects](#projects)
-* [Lessons](#lessons)
-* [Tools](#tools)
-* [Creators](#creators)
-
-## Repo
-
-Inside the repo you'll find the following folders used to organize resources for FEND. Each lesson folder is composed of **assets**, **concepts**, **keynotes**, and an optional **problem set**.
-
-```
-fend/
-└── lessons/
-     ├── L0
-     ├── L1
-     ├── L2
-     │    ├── assets
-     │    ├── concepts
-     │    ├── keynotes
-     │    └── problem-set
-     ├── L3
-     ├── L4
-     └── ...
-```
+* [Courses](#courses)
+* [Style-Guide](#style-guide)
 
 ## Projects
 
 The following is a list of current projects required to complete the Front End Nanodegree.
 
-1. [Mockup to Article](https://github.com/udacity/frontend-mockup-to-article)
-2. [Animal Trading Cards](https://github.com/udacity/fend-animal-trading-cards)
-3. Build a Portfolio Site
-4. [Online Resume](https://github.com/udacity/frontend-nanodegree-resume)
-5. [Classic Arcade Game Clone](https://github.com/udacity/frontend-nanodegree-arcade-game)
-6. [Website Optimization](https://github.com/udacity/frontend-nanodegree-mobile-portfolio)
-7. Neighborhood Map
-8. [Feed Reader Testing](http://github.com/udacity/frontend-nanodegree-feedreader)
+Note that projects that do not include associated starter code are not linked here.
 
-## Lessons
+1. Personal Blog Website
+2. [Landing Page](https://github.com/udacity/fend/tree/refresh-2019/projects/landing-page)
+3. [Weather Journal App](https://github.com/udacity/fend/tree/refresh-2019/projects/weather-journal-app)
+4. Evaluate A News Article with Natural Language Processing
+5. Capstone - Travel App
 
-The following is a list of the lessons associated with the Front End Nanodegree.
+## Courses
 
-* L0 - Establishing a Web Developer Mindset
-* L1 - Nanodegree Orientation
-* L2 - HTML Syntax
-* L3 - CSS Syntax
-* L4 - How to Write Code Faster
-* L5 - Box Model and Semantic Elements
+The following is a list of the courses associated with the Front End Nanodegree.
 
-## Tools
+* C1 - CSS, Website Layout, Website Components
+* C2 - JavaScript & The DOM
+* C3 - Web API's and Asynchronous Applications
+* C4 - Build Tools and Single Page Web Apps
+* C5 - Capstone
 
-The following is a list of tools used thoroughout the Front End Nanodegree.
-
-* [Chrome Feedback Extension](http://labs.udacity.com/udacity-feedback-extension/)
-* [JavaScript Grader](https://github.com/udacity/js-grader)
-* [Nanodegree Style Guide](http://udacity.github.io/frontend-nanodegree-styleguide/)
+## Style-Guide
 
-## Creators
+See below for the Udacity Style Guide used thoroughout the Front End Nanodegree.
 
-**Cameron Pittman**
-
-* <https://twitter.com/cwpittman>
-* <https://github.com/cameronwp>
-
-**James Parkes**
-
-* <https://twitter.com/parkesrjames>
-* <https://github.com/jamesparkes>
+* [Nanodegree Style Guide](http://udacity.github.io/frontend-nanodegree-styleguide/)
diff --git a/fend-refresh/keynotes/L0-advice.key b/fend-refresh/keynotes/L0-advice.key
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diff --git a/fend-refresh/lesson2/browsers.md b/fend-refresh/lesson2/browsers.md
deleted file mode 100644
index 21aab5bd7..000000000
--- a/fend-refresh/lesson2/browsers.md
+++ /dev/null
@@ -1,17 +0,0 @@
-Websites run in browsers, which means you need some browsers to run websites!
-
-Your users could be using **any** browser to visit the websites that you build for them. There are slight differences in the way that different browsers will render your websites, which means that you'll need to test your sites in *all* of them.
-
-Now, you don't need to download every browser right now, but I want to make sure that you install the two most popular cross-platform browsers: **Google Chrome** and **Mozilla Firefox**.
-
-Other browsers, like Apple Safari and Microsoft Edge, are fantastic as well and you should continue to browse and test your sites with them. However, both are only available on a single operating system and neither have quite as robust a set of tools for developers (ie. "Developer Tools" or "DevTools") as Chrome and Firefox.
-
-In most of the lessons on Udacity, you'll see us using Chrome. Chrome has an amazingly powerful set of Developer Tools that you'll be using to learn more about your websites than you can imagine. More on Developer Tools in later lessons.
-
-(That's not to disparage Firefox, which also has an awesome set of Developer Tools.)
-
-Right now, I want you to install Chrome and Firefox if you haven't already.
-
-[Install Chrome](https://www.google.com/chrome/browser/desktop/)
-
-[Install Firefox](https://www.mozilla.org/)
\ No newline at end of file
diff --git a/fend-refresh/lesson2/html-structure/index.html b/fend-refresh/lesson2/html-structure/index.html
deleted file mode 100644
index e32db55be..000000000
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+++ /dev/null
@@ -1,13 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>HTML Structure</title>
-</head>
-<body>
-  <h1>This is a heading.</h1>
-  <p>This is a paragraph.</p>
-  <span>This is a span. </span><span>So is this.</span>
-  <img src="image.jpg" alt="a picture">
-</body>
-</html>
diff --git a/fend-refresh/lesson2/problem-set/article-mockup/blog-mockup.png b/fend-refresh/lesson2/problem-set/article-mockup/blog-mockup.png
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diff --git a/fend-refresh/lesson2/problem-set/article-mockup/go-blog-solution.html b/fend-refresh/lesson2/problem-set/article-mockup/go-blog-solution.html
deleted file mode 100644
index 93d1b8a5f..000000000
--- a/fend-refresh/lesson2/problem-set/article-mockup/go-blog-solution.html
+++ /dev/null
@@ -1,28 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Humans vs Machines Blog</title>
-</head>
-<body>
-  <!-- adapted from: http://blog.udacity.com/2016/03/humans-vs-machines-an-ai-odyssey-2.html -->
-  <h1>Humans vs. Machines: An AI Odyssey</h1>
-  <p>By <em><strong>Christopher Watkins</strong></em></p>
-  <p>March 10, 2016</p>
-  <p>
-    <em><strong>***Breaking News: AlphaGo has won the first two matches!***</strong> In this, the third in our series on the epic Go matches being played between AlphaGo (Google’s Artificial Intelligence software) and Lee Se-Dol (Current Go World Champion), we look at the history of Humans vs. Machines, and the innovations that have led us to this incredible moment in time.</em>
-  </p>
-  <img src="http://i2.wp.com/blog.udacity.com/wp-content/uploads/2016/03/56df2490a351d802222160.gif" alt="udacity logo with go pieces">
-  <p>For as long as humans have built things, we’ve wrestled with the implications of what we’ve built. In many cases, these philosophical and ethical wrestlings have made for great drama—think Frankenstein, or 2001: A Space Odyssey. Often, the hypothetical scenarios we envision come remarkably close to true, and the discoveries we’ve made in the fields of Artificial Intelligence and Machine Learning make clear that a “computer with a mind of its own” is <s>going to take over the world</s> not such a fantastic thing to imagine any longer.</p>
-  <h2>The Triumph Of Deep Blue</h2>
-  <p>Perhaps this is why we are so captivated by human vs. machine competitions, because the idea of being overcome by that which we’ve created speaks to something very deep within our collective consciousness. When IBM’s Deep Blue faced off against Garry Kasparov<sup>1</sup>, the event resulted in more than <a href="http://www-03.ibm.com/ibm/history/ibm100/us/en/icons/deepblue/t%20drama">three billion impressions</a> around the world, and when IBM’s later creation Watson challenged the champions on Jeopardy, millions of viewers were glued to the proceedings.</p>
-  <h2>DeepMind’s AlphaGo</h2>
-  <p>Taking place right now, there is an event that, while not likely to scale the same media heights, may in fact have far greater implications when it comes to the future of “intelligent” machines. On March 9, in Seoul, South Korea, a computing system know as AlphoGo (built by researchers at DeepMind—a Google Artificial Intelligence lab) began <a href="http://venturebeat.com/2016/02/04/youtube-will-livestream-googles-ai-playing-go-superstar-lee-sedol-in-march/">a five-game match</a> against Lee Se-dol, one of the very best players in the world at the ancient game of Go.</p>
-  <p>Why is this so significant?</p>
-  <p>Here is how the DeepMind team explained it in their paper <a href="http://airesearch.com/wp-content/uploads/2016/01/deepmind-mastering-go.pdf">Mastering the Game of Go with Deep Neural Networks and Tree Search</a>:</p>
-  <p><em>The game of Go has long been viewed as the most challenging of classic games for artificial intelligence due to its enormous search space and the difficulty of evaluating board positions and moves.</em></p>
-  <p>Put another way, winning at Go is a kind of Holy Grail for those who strive to create machines that can “think” on their own, because success at this uniquely complex game seems to require something more than just skill, knowledge, and experience. It requires intuition. Feel. Style. Characteristics we associate with humans, not with machines.</p>
-  <hr>
-  <sup>1</sup> Garry Kasparov is a Russian chess Grandmaster and former World Chess Champion
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/article-mockup/index-go-blog.html b/fend-refresh/lesson2/problem-set/article-mockup/index-go-blog.html
deleted file mode 100644
index 2e1a9237d..000000000
--- a/fend-refresh/lesson2/problem-set/article-mockup/index-go-blog.html
+++ /dev/null
@@ -1,35 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Humans vs Machines Blog</title>
-</head>
-<body>
-  <!-- This was adapted from: http://blog.udacity.com/2016/03/humans-vs-machines-an-ai-odyssey-2.html -->
-  <!-- Format this text to match the mockup exactly! -->
-  Humans vs. Machines: An AI Odyssey
-  
-  By Christopher Watkins 
-  
-  March 10, 2016
-  
-  ***Breaking News: AlphaGo has won the first two matches!*** In this, the third in our series on the epic Go matches being played between AlphaGo (Google’s Artificial Intelligence software) and Lee Se-Dol (Current Go World Champion), we look at the history of Humans vs. Machines, and the innovations that have led us to this incredible moment in time.
-
-  http://i2.wp.com/blog.udacity.com/wp-content/uploads/2016/03/56df2490a351d802222160.gif
-
-  For as long as humans have built things, we’ve wrestled with the implications of what we’ve built. In many cases, these philosophical and ethical wrestlings have made for great drama—think Frankenstein, or 2001: A Space Odyssey. Often, the hypothetical scenarios we envision come remarkably close to true, and the discoveries we’ve made in the fields of Artificial Intelligence and Machine Learning make clear that a “computer with a mind of its own” is going to take over the world not such a fantastic thing to imagine any longer.
-
-  The Triumph Of Deep Blue
-
-  Perhaps this is why we are so captivated by human vs. machine competitions, because the idea of being overcome by that which we’ve created speaks to something very deep within our collective consciousness. When IBM’s Deep Blue faced off against Garry Kasparov1, the event resulted in more than [three billion impressions](http://www-03.ibm.com/ibm/history/ibm100/us/en/icons/deepblue/) around the world, and when IBM’s later creation Watson challenged the champions on Jeopardy, millions of viewers were glued to the proceedings.
-
-  DeepMind’s AlphaGo
-
-  Taking place right now, there is an event that, while not likely to scale the same media heights, may in fact have far greater implications when it comes to the future of “intelligent” machines. On March 9, in Seoul, South Korea, a computing system know as AlphoGo (built by researchers at DeepMind—a Google Artificial Intelligence lab) began [a five-game match](http://venturebeat.com/2016/02/04/youtube-will-livestream-googles-ai-playing-go-superstar-lee-sedol-in-march/) against Lee Se-dol, one of the very best players in the world at the ancient game of Go.
-  Why is this so significant?
-  Here is how the DeepMind team explained it in their paper [Mastering the Game of Go with Deep Neural Networks and Tree Search](http://airesearch.com/wp-content/uploads/2016/01/deepmind-mastering-go.pdf):
-  The game of Go has long been viewed as the most challenging of classic games for artificial intelligence due to its enormous search space and the difficulty of evaluating board positions and moves.
-  Put another way, winning at Go is a kind of Holy Grail for those who strive to create machines that can “think” on their own, because success at this uniquely complex game seems to require something more than just skill, knowledge, and experience. It requires intuition. Feel. Style. Characteristics we associate with humans, not with machines.
-  1 Garry Kasparov is a Russian chess Grandmaster and former World Chess Champion
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/article-mockup/index-images.html b/fend-refresh/lesson2/problem-set/article-mockup/index-images.html
deleted file mode 100644
index f13e2e436..000000000
--- a/fend-refresh/lesson2/problem-set/article-mockup/index-images.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Article Mockup Quiz</title>
-</head>
-<body>
-  <h2>My Breakfast</h2>
-  <h4>A Love Story</h4>
-  <p><em>By Cameron Pittman</em></p>
-  <p>8 March 2016</p>
-  <p>I <strong>love</strong> breakfast. It is, by far, the best meal of the day. ️And today, I had the best kind of breakfast: a <em>spicy</em> egg sandwich 🔥🔥🔥</p>
-  <p>Waking up quickly and getting out of bed used to be a problem for me, but I got over it because of <s>work</s> breakfast. It's a lot easier to get out of bed when I know I'm about to eat something delicious. As soon as my alarm rang this morning, I was already halfway into the kitchen.</p>
-  <p>Spicy egg day starts with my mini egg pan 🍳I ignite the burner to prep the pan. While it's warming up, I start boiling water for coffee, down a glass of cold water<sup>1</sup> and refill my glass with orange juice 🍊</p>
-  <p>I like my eggs over easy. Here's my recipe:
-    <ol>
-      <li>Drip a tablespoon of olive oil into the warm pan.</li>
-      <li>Crack a large egg into the pan carefully so the yolk stays intact.</li>
-      <li>Drench the egg in my hot sauce <em>du jour</em>.</li>
-      <li>Cook until the egg white is white and firm (usually no more than two or three minutes).</li>
-    </ol>
-  <p>To turn it into a sandwhich, I slide the egg into an English muffin that I've toasted to a golden brown. If I'm feeling fancy, I'll put a slice of Muenster cheese on top.</p>
-  <p>With my sandwich ready, I sit down with a cup of ☕️, open up the news and start the day off right!</p>
-  <hr>
-  <p><sup>1</sup> Cold water in the morning is another great way to wake up!</p>
-</body>
-</html>
diff --git a/fend-refresh/lesson2/problem-set/article-mockup/index-simple.html b/fend-refresh/lesson2/problem-set/article-mockup/index-simple.html
deleted file mode 100644
index c19e30c46..000000000
--- a/fend-refresh/lesson2/problem-set/article-mockup/index-simple.html
+++ /dev/null
@@ -1,25 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Article Mockup Quiz</title>
-</head>
-<body>
-  <h2>My Breakfast</h2>
-  <h4>A Love Story</h4>
-  <p><em>By Cameron Pittman</em></p>
-  <p>8 March 2016</p>
-  <p>I <strong>love</strong> breakfast. It is, by far, the best meal of the day. ️And today, I had the best kind of breakfast: a <em>spicy</em> egg sandwich 🔥🔥🔥</p>
-  <p>Waking up quickly and getting out of bed used to be a problem for me, but I got over it because of breakfast. It's a lot easier to get out of bed when I know I'm about to eat something delicious. As soon as my alarm rang this morning, I was already halfway into the kitchen.</p>
-  <p>Spicy egg day starts with my mini egg pan 🍳I ignite the burner to prep the pan. While it's warming up, I start boiling water for coffee, down a glass of cold water (another great way to wake up) and refill my glass with orange juice 🍊</p>
-  <p>I like my eggs over easy. Here's my recipe:
-    <ol>
-      <li>Drip a little bit of olive oil on the warm pan.</li>
-      <li>Crack a large egg into the pan carefully so the yolk stays intact.</li>
-      <li>Drench the egg in my hot sauce <em>du jour</em>.</li>
-      <li>Cook until the egg white is white and firm (usually no more than two or three minutes).</li>
-    </ol>
-  <p>To turn it into a sandwhich, I slide the egg into an English muffin that I've toasted to a golden brown. If I'm feeling fancy, I'll put a slice of Muenster cheese on top.</p>
-  <p>With my sandwich ready, I sit down with a cup of ☕️, open up the news and start the day off right!</p>
-</body>
-</html>
diff --git a/fend-refresh/lesson2/problem-set/article-mockup/index.html b/fend-refresh/lesson2/problem-set/article-mockup/index.html
deleted file mode 100644
index 8bf34c5fb..000000000
--- a/fend-refresh/lesson2/problem-set/article-mockup/index.html
+++ /dev/null
@@ -1,20 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Web Dev Blog Post</title>
-</head>
-<body>
-  <!-- This is adapted from: http://blog.udacity.com/2016/01/hottest-jobs-in-2016-2-web-developer.html -->
-  <!-- Format the text below! -->
-  Hottest Jobs in 2016 #2: Web Developer
-
-  By Christopher Watkins 
-  
-  January 19, 2016
-
-  http://i1.wp.com/blog.udacity.com/wp-content/uploads/2016/01/Slack-for-iOS-Upload.jpg?zoom=2&amp;resize=320%2C168
-  
-  There is a simple reason why Web Developer is such a hot job right now. Put simply, what Web Developers do is create how we experience … the web. If you proceed from the notion that every person who engages with the web would prefer a great experience, then you can say that everyone who engages with the web would prefer that a Web Developer have done a great job. Companies of course know this, so they hire Web Developers to ensure their sites provide great experiences. So, lots of websites and lots of users means lots of demand. LOTS of demand. 🔥
-</body>
-</html>
\ No newline at end of file
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diff --git a/fend-refresh/lesson2/problem-set/article-mockup/mockup-to-article/index.html b/fend-refresh/lesson2/problem-set/article-mockup/mockup-to-article/index.html
deleted file mode 100644
index 2e1a9237d..000000000
--- a/fend-refresh/lesson2/problem-set/article-mockup/mockup-to-article/index.html
+++ /dev/null
@@ -1,35 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Humans vs Machines Blog</title>
-</head>
-<body>
-  <!-- This was adapted from: http://blog.udacity.com/2016/03/humans-vs-machines-an-ai-odyssey-2.html -->
-  <!-- Format this text to match the mockup exactly! -->
-  Humans vs. Machines: An AI Odyssey
-  
-  By Christopher Watkins 
-  
-  March 10, 2016
-  
-  ***Breaking News: AlphaGo has won the first two matches!*** In this, the third in our series on the epic Go matches being played between AlphaGo (Google’s Artificial Intelligence software) and Lee Se-Dol (Current Go World Champion), we look at the history of Humans vs. Machines, and the innovations that have led us to this incredible moment in time.
-
-  http://i2.wp.com/blog.udacity.com/wp-content/uploads/2016/03/56df2490a351d802222160.gif
-
-  For as long as humans have built things, we’ve wrestled with the implications of what we’ve built. In many cases, these philosophical and ethical wrestlings have made for great drama—think Frankenstein, or 2001: A Space Odyssey. Often, the hypothetical scenarios we envision come remarkably close to true, and the discoveries we’ve made in the fields of Artificial Intelligence and Machine Learning make clear that a “computer with a mind of its own” is going to take over the world not such a fantastic thing to imagine any longer.
-
-  The Triumph Of Deep Blue
-
-  Perhaps this is why we are so captivated by human vs. machine competitions, because the idea of being overcome by that which we’ve created speaks to something very deep within our collective consciousness. When IBM’s Deep Blue faced off against Garry Kasparov1, the event resulted in more than [three billion impressions](http://www-03.ibm.com/ibm/history/ibm100/us/en/icons/deepblue/) around the world, and when IBM’s later creation Watson challenged the champions on Jeopardy, millions of viewers were glued to the proceedings.
-
-  DeepMind’s AlphaGo
-
-  Taking place right now, there is an event that, while not likely to scale the same media heights, may in fact have far greater implications when it comes to the future of “intelligent” machines. On March 9, in Seoul, South Korea, a computing system know as AlphoGo (built by researchers at DeepMind—a Google Artificial Intelligence lab) began [a five-game match](http://venturebeat.com/2016/02/04/youtube-will-livestream-googles-ai-playing-go-superstar-lee-sedol-in-march/) against Lee Se-dol, one of the very best players in the world at the ancient game of Go.
-  Why is this so significant?
-  Here is how the DeepMind team explained it in their paper [Mastering the Game of Go with Deep Neural Networks and Tree Search](http://airesearch.com/wp-content/uploads/2016/01/deepmind-mastering-go.pdf):
-  The game of Go has long been viewed as the most challenging of classic games for artificial intelligence due to its enormous search space and the difficulty of evaluating board positions and moves.
-  Put another way, winning at Go is a kind of Holy Grail for those who strive to create machines that can “think” on their own, because success at this uniquely complex game seems to require something more than just skill, knowledge, and experience. It requires intuition. Feel. Style. Characteristics we associate with humans, not with machines.
-  1 Garry Kasparov is a Russian chess Grandmaster and former World Chess Champion
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/article-mockup/mockup-to-article/reflections.txt b/fend-refresh/lesson2/problem-set/article-mockup/mockup-to-article/reflections.txt
deleted file mode 100644
index d94d8f181..000000000
--- a/fend-refresh/lesson2/problem-set/article-mockup/mockup-to-article/reflections.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-You've learned a lot about web development so far. I want you to take a moment to write down your thoughts about web development here. Answer the following questions:
-  * What new skills have you learned?
-  * What has been easy?
-  * What has been difficult?
-  * How have you used the problem solving strategies from the first project to overcome challenges so far?
-
----
-
-Your response goes here!
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/article-mockup/reflections.txt b/fend-refresh/lesson2/problem-set/article-mockup/reflections.txt
deleted file mode 100644
index d94d8f181..000000000
--- a/fend-refresh/lesson2/problem-set/article-mockup/reflections.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-You've learned a lot about web development so far. I want you to take a moment to write down your thoughts about web development here. Answer the following questions:
-  * What new skills have you learned?
-  * What has been easy?
-  * What has been difficult?
-  * How have you used the problem solving strategies from the first project to overcome challenges so far?
-
----
-
-Your response goes here!
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diff --git a/fend-refresh/lesson2/problem-set/article-mockup/simple-instructions.md b/fend-refresh/lesson2/problem-set/article-mockup/simple-instructions.md
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+++ /dev/null
@@ -1,24 +0,0 @@
-### Mockup to Website
-
-It's common for web developers to work with designers who focus on creating user interfaces and user experiences. Designers use software like Adobe Photoshop to mock up - draw - websites. The mockups that they create are usually just images of websites with some annotations and descriptions.
-
-As a web developer, it's often your job to translate the mockups that designers create into live websites. I chose the word "translate" because the process of going from mockup to website is similar to the process of translating between natural languages. Just as you can create the same meaning using different words and phrases with a natural language, you can create the same website design using different HTML elements.
-
-I want you to practice the process of going from a mockup to a website now! Here is a website mockup (note: I zoomed in for the screen shot):
-
-![simple article mockup](//lh3.googleusercontent.com/S_j1NJVMe1zwf7h5a0mSBiVAVn4Emv7nIKo2uReb9IoVTopfkTtRenVaBdHcoX8NSnGoiF_rzX85rdj6drA=s600)
-
-You can find a copy of this image in `web-deb-blog.zip` in the instructor notes. You'll also find a file to start editing (`index.html`) and a copy of the mockup.
-
-There are many ways to turn this mockup into website. As such, you won't be getting feedback on your site using the Chrome extension. Rather, I want you to compare your website to the mockup. You'll know you've finished this exercise when your site looks the same :)
-
-### How to Complete this Quiz
-
-1. Download and unzip `web-deb-blog.zip`, which you can find in the downloadables section.
-2. Open the mockup and decide how you want to create the article.
-2. Edit `index.html` until your website looks identical to the mockup.
-3. Practice indenting children elements. I'll show you how I indented my HTML in the solution.
-
-Just to be clear, there is no feedback from the Chrome extension. It's up to you to decide when your website looks identical to the mockup.
-
-Click "Continue to Quiz" when you're ready to get started!
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/article-mockup/udacity.png b/fend-refresh/lesson2/problem-set/article-mockup/udacity.png
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diff --git a/fend-refresh/lesson2/problem-set/article-mockup/web-dev-blog-solution.html b/fend-refresh/lesson2/problem-set/article-mockup/web-dev-blog-solution.html
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--- a/fend-refresh/lesson2/problem-set/article-mockup/web-dev-blog-solution.html
+++ /dev/null
@@ -1,15 +0,0 @@
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Web Dev Blog Post</title>
-    </head>
-    <body>
-      <!-- This is an excerpt from: http://blog.udacity.com/2016/01/hottest-jobs-in-2016-2-web-developer.html -->
-      <h1>Hottest Jobs in 2016 #2: Web Developer</h1>
-      <p>By <strong><em>Christopher Watkins</em></strong></p>
-      <p>January 19, 2016</p>
-      <img src="http://i1.wp.com/blog.udacity.com/wp-content/uploads/2016/01/Slack-for-iOS-Upload.jpg?zoom=1&amp;resize=320%2C168" alt="hottest jobs in 2016 #2">
-      <p>There is a simple reason why Web Developer is such a hot job right now. Put simply, what Web Developers do is create how we experience … the web. If you proceed from the notion that every person who engages with the web would prefer a great experience, then you can say that everyone who engages with the web would prefer that a Web Developer have done a great job. Companies of course know this, so they hire Web Developers to ensure their sites provide great experiences. So, lots of websites and lots of users means lots of demand. LOTS of demand. 🔥</p>
-    </body>
-    </html>
\ No newline at end of file
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diff --git a/fend-refresh/lesson2/problem-set/article-mockup/web-dev-blog.zip b/fend-refresh/lesson2/problem-set/article-mockup/web-dev-blog.zip
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diff --git a/fend-refresh/lesson2/problem-set/article-mockup/web-dev-blog/index.html b/fend-refresh/lesson2/problem-set/article-mockup/web-dev-blog/index.html
deleted file mode 100644
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--- a/fend-refresh/lesson2/problem-set/article-mockup/web-dev-blog/index.html
+++ /dev/null
@@ -1,20 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Web Dev Blog Post</title>
-</head>
-<body>
-  <!-- This is adapted from: http://blog.udacity.com/2016/01/hottest-jobs-in-2016-2-web-developer.html -->
-  <!-- Format the text below! -->
-  Hottest Jobs in 2016 #2: Web Developer
-
-  By Christopher Watkins 
-  
-  January 19, 2016
-
-  http://i1.wp.com/blog.udacity.com/wp-content/uploads/2016/01/Slack-for-iOS-Upload.jpg?zoom=2&amp;resize=320%2C168
-  
-  There is a simple reason why Web Developer is such a hot job right now. Put simply, what Web Developers do is create how we experience … the web. If you proceed from the notion that every person who engages with the web would prefer a great experience, then you can say that everyone who engages with the web would prefer that a Web Developer have done a great job. Companies of course know this, so they hire Web Developers to ensure their sites provide great experiences. So, lots of websites and lots of users means lots of demand. LOTS of demand. 🔥
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/article-mockup/web-dev-blog/web-dev-blog.png b/fend-refresh/lesson2/problem-set/article-mockup/web-dev-blog/web-dev-blog.png
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diff --git a/fend-refresh/lesson2/problem-set/button-example-cn.html b/fend-refresh/lesson2/problem-set/button-example-cn.html
deleted file mode 100644
index aaed92a5c..000000000
--- a/fend-refresh/lesson2/problem-set/button-example-cn.html
+++ /dev/null
@@ -1,24 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>按钮(Button)案例</title>
-  <style>
-    code {
-      background-color: #ddd;
-    }
-  </style>
-</head>
-<body>
-  <h3>按钮案例</h3>
-  <p>
-    这是代码: <code>&lt;button&gt;一个按钮!&lt;/button&gt;</code>.
-  </p>
-  <p>
-    这是按钮: <button>一个按钮!</button>
-  </p>
-  <p>
-    注意，此按钮什么都没做。稍后你将学习如何使按钮执行操作!
-  </p>
-</body>
-</html>
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diff --git a/fend-refresh/lesson2/problem-set/button-example.html b/fend-refresh/lesson2/problem-set/button-example.html
deleted file mode 100644
index 73633f632..000000000
--- a/fend-refresh/lesson2/problem-set/button-example.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Button Example</title>
-  <style>
-    code {
-      background-color: #ddd;
-    }
-  </style>
-</head>
-<body>
-  <h3>Button Demo</h3>
-  <p>
-    Here's the code: <code>&lt;button&gt;a button!&lt;/button&gt;</code>.
-  </p>
-  <p>
-    And here's the button: <button>a button!</button>
-  </p>
-  <p>Notice that the button doesn't do anything. You'll learn how to make buttons perform actions later on!</p>
-</body>
-</html>
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diff --git a/fend-refresh/lesson2/problem-set/figures/figures.zip b/fend-refresh/lesson2/problem-set/figures/figures.zip
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diff --git a/fend-refresh/lesson2/problem-set/figures/index-solution.html b/fend-refresh/lesson2/problem-set/figures/index-solution.html
deleted file mode 100644
index efacd0056..000000000
--- a/fend-refresh/lesson2/problem-set/figures/index-solution.html
+++ /dev/null
@@ -1,20 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Figures Quiz</title>
-  <!-- the next line loads the tests for the Udacity Feedback extension -->
-  <meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-  <!--
-  You'll see some text written like this below: [words](http://website.com). You'll need to turn it in to an anchor element that looks like <a href="http://website.com">words</a>.
-
-  This is markdown syntax for a link. You can think of markdown as HTML shorthand. Learn more about it here: *****
-  -->
-
-  <!-- Turn this into HTML! -->
-  <img src="redwoods_state_park.jpg" alt="redwooooods">
-  <p>Stout Memorial Grove in Jedediah Smith Redwoods State Park in 2011 by Chmee2 (Own work) GFDL or CC BY-SA 3.0, via Wikimedia Commons - <a href="https://commons.wikimedia.org/wiki/File%3AStout_Memorial_Grove_in_Jedediah_Smith_Redwoods_State_Park_in_2011_(22).JPG">Source</a></p>
-</body>
-</html>
diff --git a/fend-refresh/lesson2/problem-set/figures/index-solution2.html b/fend-refresh/lesson2/problem-set/figures/index-solution2.html
deleted file mode 100644
index c1f4a07a3..000000000
--- a/fend-refresh/lesson2/problem-set/figures/index-solution2.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Figures Quiz</title>
-  <!-- the next line loads the tests for the Udacity Feedback extension -->
-  <meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-  <!--
-  You'll see some text written like this below: [words](http://website.com). You'll need to turn it in to an anchor element that looks like <a href="http://website.com">words</a>.
-
-  This is markdown syntax for a link. You can think of markdown as HTML shorthand. Learn more about it here: *****
-  -->
-
-  <!-- Turn this into HTML! -->
-  <figure>
-    <img src="file:///Users/cameron/Udacity/CD/fend/fend-refresh/lesson2/problem-set/figures/redwoods_state_park.jpg" alt="redwooooods">
-    <figcaption>
-      <p>
-        Stout Memorial Grove in Jedediah Smith Redwoods State Park in 2011 by Chmee2 (Own work) GFDL or CC BY-SA 3.0, via Wikimedia Commons - <a href="https://commons.wikimedia.org/wiki/File%3AStout_Memorial_Grove_in_Jedediah_Smith_Redwoods_State_Park_in_2011_(22).JPG">Source</a>
-      </p>
-    </figcaption>
-  </figure>
-</body>
-</html>
diff --git a/fend-refresh/lesson2/problem-set/figures/index.html b/fend-refresh/lesson2/problem-set/figures/index.html
deleted file mode 100644
index b40be1314..000000000
--- a/fend-refresh/lesson2/problem-set/figures/index.html
+++ /dev/null
@@ -1,21 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Figures Quiz</title>
-  <!-- the next line loads the tests for the Udacity Feedback extension -->
-  <meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-  <!--
-  You'll see some text written like this below: [words that are displayed](http://website.com). This is Markdown syntax for a link. You can think of Markdown as HTML shorthand. You'll need to turn it into HTML that looks like <a href="http://website.com">words that are displayed</a>.
-
-  Learn more about Markdown here: https://daringfireball.net/projects/markdown/
-  -->
-
-  <!-- Turn this into HTML! -->
-  redwoods_state_park.jpg
-
-  Stout Memorial Grove in Jedediah Smith Redwoods State Park in 2011 by Chmee2 (Own work) GFDL or CC BY-SA 3.0, via Wikimedia Commons - [Source](https://commons.wikimedia.org/wiki/File%3AStout_Memorial_Grove_in_Jedediah_Smith_Redwoods_State_Park_in_2011_(22).JPG)
-</body>
-</html>
diff --git a/fend-refresh/lesson2/problem-set/figures/instructions.md b/fend-refresh/lesson2/problem-set/figures/instructions.md
deleted file mode 100644
index dccf2afb2..000000000
--- a/fend-refresh/lesson2/problem-set/figures/instructions.md
+++ /dev/null
@@ -1,13 +0,0 @@
-It's important to respect copyright and attribution on the web. When you use someone else's work, you need to give the author credit. With that in mind, for this quiz you're going to create an image with a caption underneath. I want you to give credit to the image's photographer by attributing them in the image's caption and providing a link to the source material.
-
-This is what it should look like in your browser:
-
-![an image with a caption underneath](//lh3.googleusercontent.com/HffH115RhYvKQqtGtlyJdpwmAGShI-TjpMx4WT2trGtBYVUXKe00E69K7Cg7TBX4QeW_eTy1QgBjwQLSiV4=s600)
-
-### How to Complete this Quiz
-
-1. Download the file called `figures.zip` from the downloadables section. You'll find `index.html` and an image inside.
-2. Edit `index.html` so that the caption displays below the image. I want you to use a **relative** path to the image, which is going to be in the same directory as `index.html`. Remember, a relative path points to the file **from the current directory** - it does not start with the root. (Your relative path should *not* start with `/`, `file://`, `C:\`, or `http://`).
-3. There's more than one option for completing this quiz **but you only have to complete one option!** You'll get a different code depending on how you complete it. Type the code into the box in the next screen to pass the quiz!
-
-Hint: There is an HTML element made specifically for this situation! I recommend checking out the [figure element on MDN](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/figure).
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/figures/paths.md b/fend-refresh/lesson2/problem-set/figures/paths.md
deleted file mode 100644
index 5faf03c55..000000000
--- a/fend-refresh/lesson2/problem-set/figures/paths.md
+++ /dev/null
@@ -1,95 +0,0 @@
-In a moment, you'll be making a website that displays an image that is stored locally on your computer. In order to display a local image, you need to be able to write a **path**.
-
-**tl;dr** If there is a file called `index.html` in a directory and there is another directory called `example/` in the same directory, you can access any files in `example/` from `index.html` with the URL (path) `example/filename.html`, e.g. `<a href="example/filename.html">Example Path</a>`.
-
-## Paths
-
-A path is a way of describing where a file is stored.
-
-Think of it like this:
-
-Anyone in the world can use the address 1600 Pennsylvania Ave NW, Washington DC, USA 20006 to find the White House. A street address is an absolute path to a location.
-
-But, if you were at the [Eisenhower Executive Office](https://www.google.com/maps/place/Eisenhower+Executive+Office+Building/@38.8974712,-77.0390948,17z/data=!4m7!1m4!3m3!1s0x89b7b7bcdec17ee3:0xf920b148b3d45e45!2s1600+Pennsylvania+Ave+NW,+Washington,+DC+20500!3b1!3m1!1s0x0000000000000000:0x054470506cffbeb3), you could also use the phrase "next door" to find the White House. "Next door" is a relative path because it depends on your current location.
-
-There are essentially two domains for paths that you'll need to consider as a web developer: paths to find files on your computer, **local** files, and paths to find files on other computers, **external** files.
-
-### Local Paths
-
-Computers have folders (also called "directories"). Operating systems like Windows, Mac and Linux organize *all* of your files into a tree of directories called a **file system**. There's a top-most directory, often called the **root**, that contains all of the other directories. Within the root, there are files and directories. Within those directories are more files and more directories. And within those directories are even more files and directories, and so on.
-
-Compare this part of the file system on my computer:
-
-![a directory on cameron's computer](//lh3.googleusercontent.com/ole_-MGTl2e7ijtHOXPd5kvoQcvcI5QIQ1ft8mBIeSWuuVHcm73X5p21AwWuXsl-Og7Jvo65Q0XuZQ9kuCA=s500)
-
-to a tree diagram showing the same directory structure:
-
-![cameron's directory structure as a tree](//lh3.googleusercontent.com/2eiWP70-_g6jd_ZF23LBWpK_b3ZS8OmZXNfKfCUcghfJzSZGF49mc5AwJEOTmXuL0IKg-8okaJM9z1VZvg=s500)
-
-Every file has an address, which we call the "path." An absolute path is written in relation to the computer's root directory. For instance, a file in the Documents folder on a Mac has a path that looks like this:
-
-    /Users/cameron/Documents/file.txt
-
-`file.txt` is stored inside `Documents/`. `Users/`, `cameron/` and `Documents/` are all names of directories. `Documents/` lives inside `cameron/` and `cameron/` lives inside `Users/`. `Users/` is inside the root directory, which is represented by the first `/`. The rest of the `/` are used to separate directories.
-
-When you open an HTML file in your browser, you're seeing the absolute path to the file on your computer.
-
-![image showing file path url](//lh3.googleusercontent.com/dNRz-Nx2mHFS31Ni8WwCKHcLRXuahUyWuJiI9_sA29cLwJtW_7mPrsJWnAwq3rbzqnmgDx1sZrDp1K_7yr2O=s600)
-
-This URL will *only* work for you on your computer. As no one else has your file system, this URL is unique to your computer. If you want other people to be able to access it, then you need an...
-
-### External Paths
-
-The process of loading a website from a URL like `https://www.udacity.com` mimics opening an HTML file that you've written and saved to your computer. Every website starts with an HTML file. It just so happens that when you want to visit a website, the HTML file that you want to open lives on a different computer. The computer responsible for giving you a website's files is called a **server**.
-
-Pointing your browser to `https://www.udacity.com` sends a request to Udacity's server for the HTML file (and others) that your computer needs to load the Udacity website. You can think of `udacity.com` as the root path of Udacity's server (computer) that anyone can access (the reality of the situation is actually much more complicated but the general idea is true). Unlike your personal computer (for now!), Udacity's servers run software that **expose** files to the web, which means that they make them available to anyone who wants them. Servers have an **external path** that anyone can access and is the reason why the web works.
-
-Different websites are just different collections of files. Every website is really just a server (or many servers) with an external address, which we call a URL. Servers store files and send them to computers who request them (the requesting computers are called **clients**).
-
-There are different **protocols** for serving files, the most common of which on the web are HTTP and HTTPS. When you open a file on your own computer, you're using the file protocol. You don't need to know much more about protocols for now, but if you're interested in learning (a lot!) more about HTTP, check out [Networking for Web Developers](https://www.udacity.com/course/networking-for-web-developers--ud256).
-
-### Relative Paths
-
-The relative path is similar to the absolute path, but it describes how to find to a file from a directory that is not the root directory. Like using the phrase "next door" to tell someone how to find the White House from the Eisenhower Executive Office, a relative path takes advantage of the location of one file to describe where another file can be found.
-
-Relative paths work the same for both local and external paths. Let's break down two examples of absolute paths to see how relative paths work.
-
-**External**:
-
-    <a href="http://labs.udacity.com/fend/example/hello-world.html">Hello, world!</a>
-
-**Local**:
-
-    <a href="/Users/cameron/Udacity/etc/labs/fend/example/hello-world.html"> Hello, world!</a>
-
-`href` is really just a path to a file.
-
-Both examples are links to the same file using absolute paths, but the external example would work for anyone and only my computer can use the link in the local example.
-
-Pay attention to the `fend/example/hello-world.html` portion of both paths - they mean the same thing.
-
-Imagine that you are editing `/Users/cameron/Udacity/etc/labs/fend/test.html`. `test.html` can reference `hello-world.html` by describing how to get from it's location in `fend/` to `hello-world.html`. The relative path would look like:
-
-    example/hello-world.html
-
-This relative path takes advantage of the fact that `test.html` and `example/` are in the same directory.
-
-But what if I'm editing a file in `/Users/cameron/Udacity/etc/labs/` and I want to write a path to `hello-world.html`? In that case, the relative path would be:
-
-    fend/example/hello-world.html
-
-Now that I'm in `labs/`, not `fend/`, I have to include `fend/` in a relative path to `hello-world.html`.
-
-To finish this off, let's imagine there are two files:
-
-    http://labs.udacity.com/science/sciences.html
-
-and
-
-    http://labs.udacity.com/science/physics/relativity.html
-
-In order to write a relative path from `sciences.html` to `relativity.html`, I only need to include the part of the path that describes how to get from `science/` to `relativity.html`:
-
-    <a href="physics/relativity.html">Einstein's Special Relativity</a>
-
-And that's it! You'll be using relative paths in the next quiz.
\ No newline at end of file
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diff --git a/fend-refresh/lesson2/problem-set/figures/solution.md b/fend-refresh/lesson2/problem-set/figures/solution.md
deleted file mode 100644
index 2c9ce4d4a..000000000
--- a/fend-refresh/lesson2/problem-set/figures/solution.md
+++ /dev/null
@@ -1,35 +0,0 @@
-I've got a few possible solutions below. Before I show them to you, I want to point something out: **indentation**.
-
-Indentation is a bit of an art and a science in HTML (and programming in general). Careful indentation illuminates the structure of code and makes code easier to read, write and debug. We expect that you'll be purposeful about your indentation too.
-
-Pay attention to the indentation in my solutions and then read my discussion afterward.
-
-### Option 1 Solution
-
-![solution with paragraph and image](//lh3.googleusercontent.com/VzaTeG7CjPZwl6QDMbRN0m9GhSMdAbD6r6BwzlWUt7MyGaKt97_5wR3GpcE9u3d0HUnBNJQuGlsDA8vZ4gQ=s600)
-
-This is the simplest way to add a caption. Notice that my image has an `alt` attribute.
-
-### Option 2 Solution
-
-![solution with a figure](//lh3.googleusercontent.com/aPlda_80cShrns2pYRZnxr0o6aF0jeb7KHPY3ugDZ4g_8vMRFrk3ckjppnI1GcufpNmFuy_qqAsGflUelw=s600)
-
-In this example, I'm wrapping the image and caption in a `figure` element. Notice that the caption has a special element: a `figcaption`.
-
-The result actually looks slightly different (namely, the spacing around the element) but this is probably a *better* way of making a caption. While an image and a paragraph could be next to each other on a website for *any* reason, the names `figure` and `figcaption` tell you *why* this HTML is here. Academic writings refer to pairs of images and captions as "figures," and use phrases like "Examine figure 1..." or "In figure 2, you can see...". Thus, a `figure` mimics an academic figure.
-
-*******Example of academic figure!!!*******
-
-`figure` is an example of something called a **semantic** element, which is an element named after its purpose.
-
-Alternatively, you could have wrapped the content in the `figcaption` with a paragraph element, like so:
-
-![solution with a figure and paragraph](//lh3.googleusercontent.com/-CeEJ5YUp-QDCkTXvm1lgUKdmlPC6DVgVFIaQ0xMMoxZRQtamFc6-GzfGepJWpIcHH0kH0ZINctRhWGUpQ=s600)
-
-The end result has slightly more spacing around the caption.
-
-**Indentation Discussion**
-
-I usually indent child elements inside parents. Notice that the `img` and `figcaption` are both indented inside the `figure` in the solution to option 2. I **don't** indent when a child element is part of a line or sentence. For instance, I don't indent links because their content is read as part of a sentence.
-
-I also indented the text content inside the `p` in option 1 and the `figcaption` in option 2. I did this because the text looks like a big block in my code editor and it's easier to read if it is on its own line.
diff --git a/fend-refresh/lesson2/problem-set/figures/tests.json b/fend-refresh/lesson2/problem-set/figures/tests.json
deleted file mode 100644
index 985700164..000000000
--- a/fend-refresh/lesson2/problem-set/figures/tests.json
+++ /dev/null
@@ -1,119 +0,0 @@
-[{
-  "name": "Option 1",
-  "code": "arenttreescool?",
-  "tests": [
-    {
-      "description": "There is one image on the page",
-      "definition": {
-        "nodes": "img",
-        "get": "count",
-        "equals": 1
-      }
-    },
-    {
-      "description": "The image has a relative src",
-      "definition": {
-        "nodes": "img",
-        "attribute": "src",
-        "hasSubstring": "^redwoods_state_park.jpg$"
-      }
-    },
-    {
-      "description": "The image has an alt attribute",
-      "definition": {
-        "nodes": "img",
-        "attribute": "alt",
-        "hasSubstring": ".+"
-      }
-    },
-    {
-      "description": "There is paragraph element after the image",
-      "definition": {
-        "nodes": "img + p",
-        "exists": true
-      }
-    },
-    {
-      "description": "The paragraph contains the correct source link",
-      "definition": {
-        "nodes": "img + p > a",
-        "attribute": "href",
-        "hasSubstring": "https:\\/\\/commons\\.wikimedia\\.org\\/wiki\\/File%3AStout_Memorial_Grove_in_Jedediah_Smith_Redwoods_State_Park_in_2011_\\(22\\).JPG"
-      }
-    },
-    {
-      "description": "The paragraph attributes the photographer",
-      "definition": {
-        "nodes": "img + p",
-        "get": "innerHTML",
-        "hasSubstring": "Stout Memorial Grove in Jedediah Smith Redwoods State Park in 2011"
-      }
-    }
-  ]
-}, {
-  "name": "Option 2",
-  "code": "morethanafigurehead",
-  "tests": [
-    {
-      "description": "There is a figure element on the page",
-      "definition": {
-        "nodes": "figure",
-        "exists": true
-      }
-    },
-    {
-      "description": "The figure element contains an image",
-      "definition": {
-        "nodes": "figure > img",
-        "exists": true
-      }
-    },
-    {
-      "description": "There is one image on the page",
-      "definition": {
-        "nodes": "img",
-        "get": "count",
-        "equals": 1
-      }
-    },
-    {
-      "description": "The image has a relative src",
-      "definition": {
-        "nodes": "img",
-        "attribute": "src",
-        "hasSubstring": "^redwoods_state_park.jpg$"
-      }
-    },
-    {
-      "description": "The image has an alt attribute",
-      "definition": {
-        "nodes": "img",
-        "attribute": "alt",
-        "hasSubstring": ".+"
-      }
-    },
-    {
-      "description": "There is figcaption element after the image",
-      "definition": {
-        "nodes": "img + figcaption",
-        "exists": true
-      }
-    },
-    {
-      "description": "The figcaption contains the correct source link",
-      "definition": {
-        "nodes": "figcaption a",
-        "attribute": "href",
-        "hasSubstring": "https:\\/\\/commons\\.wikimedia\\.org\\/wiki\\/File%3AStout_Memorial_Grove_in_Jedediah_Smith_Redwoods_State_Park_in_2011_\\(22\\).JPG"
-      }
-    },
-    {
-      "description": "The figcaption attributes the photographer",
-      "definition": {
-        "nodes": "img + figcaption",
-        "get": "innerHTML",
-        "hasSubstring": "Stout Memorial Grove in Jedediah Smith Redwoods State Park in 2011"
-      }
-    }
-  ]
-}]
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/headers/headers.zip b/fend-refresh/lesson2/problem-set/headers/headers.zip
deleted file mode 100644
index d73ac6f35..000000000
Binary files a/fend-refresh/lesson2/problem-set/headers/headers.zip and /dev/null differ
diff --git a/fend-refresh/lesson2/problem-set/headers/index 2.html b/fend-refresh/lesson2/problem-set/headers/index 2.html
deleted file mode 100644
index fbf5cfe81..000000000
--- a/fend-refresh/lesson2/problem-set/headers/index 2.html	
+++ /dev/null
@@ -1,12 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Headers Quiz</title>
-  <!-- the next line loads the tests for the Udacity Feedback extension -->
-  <meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-  <p>Add your headers below this paragraph element! Add an h1, h2, h3, and h4 to finish the quiz. And make sure every header has text content :)</p>
-</body>
-</html>
diff --git a/fend-refresh/lesson2/problem-set/headers/index.html b/fend-refresh/lesson2/problem-set/headers/index.html
deleted file mode 100644
index f8b28aeaf..000000000
--- a/fend-refresh/lesson2/problem-set/headers/index.html
+++ /dev/null
@@ -1,16 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Headers Quiz</title>
-  <!-- the next line loads the tests for the Udacity Feedback extension -->
-  <meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-  <p>Add your headers below this paragraph element! Add an h1, h2, h3, and h4 to finish the quiz. And make sure every header has text content :)</p>
-  <h1>Biggest header</h1>
-  <h2>Smaller header</h2>
-  <h3>Even smaller</h3>
-  <h4>Not the smallest, actually. <code>&lt;h6&gt;</code> is the smallest.</h4>
-</body>
-</html>
diff --git a/fend-refresh/lesson2/problem-set/headers/tests-zh.json b/fend-refresh/lesson2/problem-set/headers/tests-zh.json
deleted file mode 100644
index 03dd95f15..000000000
--- a/fend-refresh/lesson2/problem-set/headers/tests-zh.json
+++ /dev/null
@@ -1,66 +0,0 @@
-[{
-  "name": "Headers Quiz",
-  "code": "headandshoulders",
-  "tests": [
-    {
-      "description": "页面上有一个h1",
-      "definition": {
-        "nodes": "h1",
-        "exists": true
-      }
-    },
-    {
-      "description": "h1包含内容",
-      "definition": {
-        "nodes": "h1",
-        "get": "innerHTML",
-        "hasSubstring": ".+"
-      }
-    },
-    {
-      "description": "页面上有一个h2",
-      "definition": {
-        "nodes": "h2",
-        "exists": true
-      }
-    },
-    {
-      "description": "h2包含内容",
-      "definition": {
-        "nodes": "h2",
-        "get": "innerHTML",
-        "hasSubstring": ".+"
-      }
-    },
-    {
-      "description": "页面上有一个h3",
-      "definition": {
-        "nodes": "h3",
-        "exists": true
-      }
-    },
-    {
-      "description": "h3包含内容",
-      "definition": {
-        "nodes": "h3",
-        "get": "innerHTML",
-        "hasSubstring": ".+"
-      }
-    },
-    {
-      "description": "页面上有一个h4",
-      "definition": {
-        "nodes": "h4",
-        "exists": true
-      }
-    },
-    {
-      "description": "h4包含内容",
-      "definition": {
-        "nodes": "h4",
-        "get": "innerHTML",
-        "hasSubstring": ".+"
-      }
-    }
-  ]
-}]
diff --git a/fend-refresh/lesson2/problem-set/headers/tests.json b/fend-refresh/lesson2/problem-set/headers/tests.json
deleted file mode 100644
index 0cea14d43..000000000
--- a/fend-refresh/lesson2/problem-set/headers/tests.json
+++ /dev/null
@@ -1,66 +0,0 @@
-[{
-  "name": "Headers Quiz",
-  "code": "headandshoulders",
-  "tests": [
-    {
-      "description": "There is an h1 on the page",
-      "definition": {
-        "nodes": "h1",
-        "exists": true
-      }
-    },
-    {
-      "description": "The h1 has content",
-      "definition": {
-        "nodes": "h1",
-        "get": "innerHTML",
-        "hasSubstring": ".+"
-      }
-    },
-    {
-      "description": "There is an h2 on the page",
-      "definition": {
-        "nodes": "h2",
-        "exists": true
-      }
-    },
-    {
-      "description": "The h2 has content",
-      "definition": {
-        "nodes": "h2",
-        "get": "innerHTML",
-        "hasSubstring": ".+"
-      }
-    },
-    {
-      "description": "There is an h3 on the page",
-      "definition": {
-        "nodes": "h3",
-        "exists": true
-      }
-    },
-    {
-      "description": "The h3 has content",
-      "definition": {
-        "nodes": "h3",
-        "get": "innerHTML",
-        "hasSubstring": ".+"
-      }
-    },
-    {
-      "description": "There is an h4 on the page",
-      "definition": {
-        "nodes": "h4",
-        "exists": true
-      }
-    },
-    {
-      "description": "The h4 has content",
-      "definition": {
-        "nodes": "h4",
-        "get": "innerHTML",
-        "hasSubstring": ".+"
-      }
-    }
-  ]
-}]
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/image-ud/index.html b/fend-refresh/lesson2/problem-set/image-ud/index.html
deleted file mode 100644
index eb30ec546..000000000
--- a/fend-refresh/lesson2/problem-set/image-ud/index.html
+++ /dev/null
@@ -1,48 +0,0 @@
-![Puppy by dbking (originally posted to Flickr as 272_7242) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons](//lh3.googleusercontent.com/Zp5_aGJ-ew6hmKluUfw7VVPsJ8fp7bwTdJb1uKlYVVrtORP4HF5Q2opW31XgcL6UARZDAF8YRi4Iw1QRy48=s200) ![Kitten by Steve-h (Flickr: Maggie) [CC BY-SA 2.0 (http://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons](https://lh3.googleusercontent.com/DZ9wJLvPV6GNLpzvnaUXbZgibPascH0v_Rl1DJB8wT-sJyBRmIVnBAqThr23OaE1bDe2Gg9DO1zavXDv_w=s200) ![Earth image by Norman Kuring, NASA GSFC, using data from the VIIRS instrument aboard Suomi NPP.](//lh3.googleusercontent.com/RZV4r5f49-7bGwSXmNmRHW3ixqdBgmzQxBkWrqq-Inlbe5lgVOWtCNHlMxxNne1VeCBWW3Du6CYxzQX3Was=s220)
-
-IMAGES! Images on the web are awesome. Time to make one.
-
-For this quiz, you'll be creating an image here in the Udacity classroom. I'll give you the URL of an image and it will be your job to make it display.
-
-An image is made with an <img> element. It looks like so:
-
-    <img src="http://somewebsite.com/image.jpg" alt="short description">
-
-The source attribute, `src`, is like the `href` of a link - it is the URL of the image you want to display. For now, your images will need to be hosted online, which means that the URL will need to start with `http://` or `https://`. You'll learn about other ways to set image sources later. The `alt` attribute stands for "alternative description," which is important for people who use screen readers to browse the web. This is text that will show up in lieu of the actual image.
-
-An image element is a little different than the elements you've seen before. Images do not need closing tags!
-
-Here's the [MDN reference about images](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img).
-
-Click "Continue to Quiz" when you're ready to go!
-
----
-[Puppy image by dbking (originally posted to Flickr as 272_7242) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons](https://commons.wikimedia.org/wiki/File%3ASt._Bernard_puppy.jpg)
-
-[Kitten image by Steve-h (Flickr: Maggie) [CC BY-SA 2.0 (http://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons](https://commons.wikimedia.org/wiki/File%3AGreen_eyes_kitten.jpg)
-
-[Earth image by Norman Kuring, NASA GSFC, using data from the VIIRS instrument aboard Suomi NPP.](http://visibleearth.nasa.gov/view.php?id=78314)
-
-<!--
-Sample image element:
-    
-    <img src="http://somewebsite.com/image.jpg" alt="short description">
-
-How to complete this quiz:
-
-* Create an image element at the designated spot in the paragraph below.
-* Set the source to: http://udacity.github.io/fend/images/udacity.png
-* Set the alt description to a quick description of the image (maybe something like, "Udacity logo").
-* Play around with the URL! See if you can make a different image appear.
--->
-
-<p>
-  This is a big paragraph of text about Udacity. Cool. Cool. And here is an image! <!-- put the image element here! --> Here is more text. Here's another question for you: how is the text reacting to the image? Is the image on its own line or is it showing up in the same last as the rest of the text?
-</p>
-
-
-<!--
-Here's how I made my image element: <img src="http://udacity.github.io/fend/images/udacity.png" alt="Udacity logo">
-
-Did you notice that the image displayed in the same line as the rest of the text? Images are inline elements, which means that they are perfectly happy appearing in the same line as text. You'll be learning more about inline elements in later lessons.
--->
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/image-ud/unit_tests.js b/fend-refresh/lesson2/problem-set/image-ud/unit_tests.js
deleted file mode 100644
index d0671ed3c..000000000
--- a/fend-refresh/lesson2/problem-set/image-ud/unit_tests.js
+++ /dev/null
@@ -1,36 +0,0 @@
-function performSubmission() {
-  var grader = new Grader();
-
-  grader.addTest(function() {
-    return grader.elemDoesExist('img');
-  }, {
-    wrongMessage: 'Make sure you add an image element to the page!'
-  }, false);
-
-  grader.addTest(function() {
-    return grader.elemDoesExist('p > img');
-  }, {
-    wrongMessage: 'The image needs to be a child of the paragraph.'
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasAttr('p > img', 'src', 'http://udacity.github.io/fend/images/udacity.png');
-  }, {
-    wrongMessage: 'The image source attribute should be set to: http://udacity.github.io/fend/images/udacity.png'
-  });
-
-  grader.addTest(function() {
-    return grader.hasAttr('p > img', 'alt');
-  }, {
-    wrongMessage: 'The image needs an alt attribute that describes what it is.'
-  });
-
-  grader.runTests();
-
-  return {
-    is_correct: grader.isCorrect,
-    test_feedback: grader.getFormattedWrongMessages('\n'),
-    test_comments: grader.getFormattedComments('\n'),
-    congrats: "Nice job! If you haven't already, try changing the URL to make other images appear!"
-  }
-}
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/link.py b/fend-refresh/lesson2/problem-set/link.py
deleted file mode 100644
index 4111ccec6..000000000
--- a/fend-refresh/lesson2/problem-set/link.py
+++ /dev/null
@@ -1,67 +0,0 @@
-import re
-
-student_code = widget_inputs["text1"].strip()
-
-comments = []
-def commentizer(new):
-    if new not in comments:
-        comments.append(new)
-
-is_correct = False
-
-def run_through_problems():
-    if not re.match("^<a", student_code):
-        commentizer("Make sure you start the hyperlink with an opening `a` tag: `<a`.")
-        return False
-
-    if not re.match("^<a\s+href", student_code):
-        commentizer("Remember, you need to add an `href` attribute. It should come right after `<a`.")
-        return False
-
-    if re.match("^<a\s{2,}href", student_code):
-        commentizer("You've got too many spaces after `<a`. You should only have one.")
-        return False
-
-    if re.match("^<a href\s+=", student_code):
-        commentizer("Looks like you've got extra space before the `=`.")
-    
-    if re.match("^<a href\s*=\s+", student_code):
-        commentizer("Looks like you've got extra space after the `=`.")
-
-    if not re.match("^<a href=\"\S*\"", student_code):
-        commentizer("Make sure that the `href` is equal to a URL with `\"` around it. Eg. `href=\"http://website.com\"`. You should not have any spaces inside the URL.")
-        return False
-        
-    if not re.match("^<a href=\"https*://(www\.){0,1}google.com\"", student_code, re.IGNORECASE):
-        commentizer("The `href` needs to be set equal to the Google website.")
-        return False
-
-    if not re.match("^<a href=\"https*://(www\.){0,1}google.com\">", student_code, re.IGNORECASE):
-        commentizer("Don't forget to close the opening tag right after the `href`!")    
-        
-        if re.match("^<a href=\"https*://(www\.){0,1}google.com\"\s+>", student_code, re.IGNORECASE):
-            commentizer("Looks like you've got extra space after the `href`.")        
-
-    if not re.match(".+>\s*Google\s*", student_code, re.IGNORECASE):
-        commentizer("Make sure your link displays as Google!")
-        return False
-
-    if not re.match(".*<\/a>$", student_code):
-        commentizer("Don't forget to close the link with `</a>`.")
-    
-        if re.match(".*<\/a>.+", student_code):
-            commentizer("There shouldn't be anything after the closing tag.")
-        if re.match(".*<a>$", student_code):
-            commentizer("Looks like you forgot the slash in the closing tag :)")
-    return False
-
-if re.match("^<a href=\"https*://(www\.){0,1}google.com\">\s*Google\s*<\/a>$", student_code, re.IGNORECASE):
-    is_correct = True
-else:
-    run_through_problems()
-
-if is_correct:
-    commentizer("Great job! You're learning how to pay attention to details when writing HTML.")
-
-grade_result["comment"] = "\n\n".join(comments)
-grade_result["correct"] = is_correct
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/lists/index.html b/fend-refresh/lesson2/problem-set/lists/index.html
deleted file mode 100644
index 78beb7753..000000000
--- a/fend-refresh/lesson2/problem-set/lists/index.html
+++ /dev/null
@@ -1,15 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Lists Quiz</title>
-  <!-- the next line loads the tests for the Udacity Feedback extension -->
-  <meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-  <p>Create an unordered list! Make a list of the three web languages: HTML, CSS and JavaScript.</p>
-  <!-- 
-  Your code goes here!
-  -->
-</body>
-</html>
diff --git a/fend-refresh/lesson2/problem-set/lists/lists.zip b/fend-refresh/lesson2/problem-set/lists/lists.zip
deleted file mode 100644
index a819f1619..000000000
Binary files a/fend-refresh/lesson2/problem-set/lists/lists.zip and /dev/null differ
diff --git a/fend-refresh/lesson2/problem-set/lists/tests.json b/fend-refresh/lesson2/problem-set/lists/tests.json
deleted file mode 100644
index 394a92f85..000000000
--- a/fend-refresh/lesson2/problem-set/lists/tests.json
+++ /dev/null
@@ -1,48 +0,0 @@
-[{
-  "name": "Unordered List Quiz",
-  "code": "listlistlistlist",
-  "tests": [
-    {
-      "description": "There is an unordered list on the page",
-      "definition": {
-        "nodes": "ul",
-        "exists": true
-      }
-    },
-    {
-      "description": "There are three list elements in the unordered list",
-      "definition": {
-        "nodes": "ul > li",
-        "get": "count",
-        "equals": 3
-      }
-    },
-    {
-      "description": "There is a list element that displays 'HTML'",
-      "definition": {
-        "nodes": "li",
-        "get": "innerHTML",
-        "limit": "some",
-        "hasSubstring": "HTML"
-      }
-    },
-    {
-      "description": "There is a list element that displays 'CSS'",
-      "definition": {
-        "nodes": "li",
-        "get": "innerHTML",
-        "limit": "some",
-        "hasSubstring": "CSS"
-      }
-    },
-    {
-      "description": "There is a list element that displays JavaScript",
-      "definition": {
-        "nodes": "li",
-        "get": "innerHTML",
-        "limit": "some",
-        "hasSubstring": "(javascript)|(js)|(JavaScript)"
-      }
-    }
-  ]
-}]
diff --git a/fend-refresh/lesson2/problem-set/ps1-q1-buttonelem.py b/fend-refresh/lesson2/problem-set/ps1-q1-buttonelem.py
deleted file mode 100644
index 8fa338db3..000000000
--- a/fend-refresh/lesson2/problem-set/ps1-q1-buttonelem.py
+++ /dev/null
@@ -1,42 +0,0 @@
-import re
-
-student_code = widget_inputs["text1"].strip()
-
-comments = []
-def commentizer(new):
-    if new not in comments:
-        comments.append(new)
-
-is_correct = False
-
-def run_through_problems():
-    if not re.match(".*button.*", student_code):
-        commentizer("Remember, you're creating a `button` element that looks like `<tag>content</tag>`. `button` is the tag name.")
-        return False
-
-    if not re.match("^<button>", student_code):
-        commentizer("You need to start with an opening tag for a button. It should look like this: `<tag>`.")
-        
-        if re.match("^<\/button>", student_code):
-            commentizer("It looks like you're starting the element with a closing tag. The tag that looks like `</tag>` should go at the end of the element.")
-
-    if not re.match(".+<\/button>$", student_code):
-        commentizer("You need to end the button element with a closing tag. It should look like this: `</tag>`.")    
-        
-        if re.match(".+<button>$", student_code):
-            commentizer("Your closing tag is missing the slash! It should look like this: `</tag>`.")
-
-    if not re.match(".+>.+<.+", student_code):
-        commentizer("Make sure you add some content to your button. It can say anything!")
-    return False
-
-if re.match("^<button>.+<\/button>$", student_code):
-    is_correct = True
-else:
-    run_through_problems()
-
-if is_correct:
-    commentizer("Great job! You're learning how to pay attention to details when writing HTML.")
-
-grade_result["comment"] = "\n\n".join(comments)
-grade_result["correct"] = is_correct
diff --git a/fend-refresh/lesson2/problem-set/tree-to-html/index.html b/fend-refresh/lesson2/problem-set/tree-to-html/index.html
deleted file mode 100644
index 281faf6d0..000000000
--- a/fend-refresh/lesson2/problem-set/tree-to-html/index.html
+++ /dev/null
@@ -1,18 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Tree to HTML</title>
-  <!-- the next line loads the tests for the Udacity Feedback extension -->
-  <meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-  <!-- Did you notice that the body tag - the top of the sample tree - is already here? You don't need to add another one. -->
-  <!-- Your code goes here! -->
-  <h1>My Header!</h1>
-  <div>
-    <p>Very intelligent content.</p>
-    <p>These words are insightful.</p>
-  </div>
-</body>
-</html>
diff --git a/fend-refresh/lesson2/problem-set/tree-to-html/sample-tree.png b/fend-refresh/lesson2/problem-set/tree-to-html/sample-tree.png
deleted file mode 100644
index 52b0c8f8b..000000000
Binary files a/fend-refresh/lesson2/problem-set/tree-to-html/sample-tree.png and /dev/null differ
diff --git a/fend-refresh/lesson2/problem-set/tree-to-html/tests.json b/fend-refresh/lesson2/problem-set/tree-to-html/tests.json
deleted file mode 100644
index c4ee34f39..000000000
--- a/fend-refresh/lesson2/problem-set/tree-to-html/tests.json
+++ /dev/null
@@ -1,83 +0,0 @@
-[{
-  "name": "Tree to HTML Quiz",
-  "code": "letsclimbatree",
-  "tests": [
-    {
-      "description": "The body is on the page",
-      "definition": {
-        "nodes": "body",
-        "exists": true
-      }
-    },
-    {
-      "description": "There is one h1",
-      "definition": {
-        "nodes": "h1",
-        "get": "count",
-        "equals": 1
-      }
-    },
-    {
-      "description": "h1 is a child of the body",
-      "definition": {
-        "nodes": "body > h1",
-        "exists": true
-      }
-    },
-    {
-      "description": "The h1 has content",
-      "definition": {
-        "nodes": "body > h1",
-        "get": "innerHTML",
-        "hasSubstring": ".+"
-      }
-    },
-    {
-      "description": "There is one div",
-      "definition": {
-        "nodes": "div",
-        "get": "count",
-        "equals": 1
-      }
-    },
-    {
-      "description": "div is a child of the body",
-      "definition": {
-        "nodes": "body > div",
-        "exists": true
-      }
-    },
-    {
-      "description": "The div has two children",
-      "definition": {
-        "nodes": "div > *",
-        "get": "count",
-        "equals": 2
-      }
-    },
-    {
-      "description": "There are two paragraphs",
-      "definition": {
-        "nodes": "p",
-        "get": "count",
-        "equals": 2
-      }
-    },
-    {
-      "description": "The paragraphs are children of the div",
-      "definition": {
-        "nodes": "div > p",
-        "get": "count",
-        "equals": 2
-      }
-    },
-    {
-      "description": "Paragraphs have content",
-      "definition": {
-        "nodes": "p",
-        "get": "innerHTML",
-        "hasSubstring": ".+"
-      }
-    }
-  ]
-}]
\ No newline at end of file
diff --git a/fend-refresh/lesson2/problem-set/tree-to-html/tree-to-html.zip b/fend-refresh/lesson2/problem-set/tree-to-html/tree-to-html.zip
deleted file mode 100644
index 00461b49f..000000000
Binary files a/fend-refresh/lesson2/problem-set/tree-to-html/tree-to-html.zip and /dev/null differ
diff --git a/fend-refresh/lesson2/project-instructions.md b/fend-refresh/lesson2/project-instructions.md
deleted file mode 100644
index 769b5ec74..000000000
--- a/fend-refresh/lesson2/project-instructions.md
+++ /dev/null
@@ -1,25 +0,0 @@
-### Project Overview
-
-Hey there, web developer! Congratulations on making it this far! Here's your next project: **translating a mockup to HTML**. This is similar to the exercise from earlier in the problem set, except this article is going to be a bit more complicated. I'll be giving you a mockup of a website (and a copy of the text in it). It's going to be your job to recreate it with HTML.
-
-You're going to see some formatting you haven't encountered before, so you'll need to use a resource, like the [MDN element reference](https://developer.mozilla.org/en-US/docs/Web/HTML/Element), to research new elements.
-
-### Project Instructions
-
-0. Complete the problem set! This project will be much easier if you've finished every problem set exercise first.
-0. Download and unzip `mockup-to-html.zip` from the downloadables section. You'll find `article.html`, the article mockup image and a file called `reflections.txt` inside.
-1. Use what you've learned about web development so far to edit `article.html` so that it looks **exactly** like the mockup image. You will need to use new elements, which means that you'll need to [research](https://developer.mozilla.org/en-US/docs/Web/HTML/Element) and experiment! (Hint: they are called "superscript," "horizontal rule," and "strikethrough.")
-2. When you've finished building the article, open up `reflections.txt`. You've learned a lot about web development so far. I want you to take a moment to write down your thoughts about web development in `reflections.txt`. Answer the following questions:
-  * What new skills have you learned?
-  * What has been easy?
-  * What has been difficult?
-  * How have you used the problem solving strategies from the first project to overcome challenges so far?
-
-### Project Submission
-
-* Take a moment to double check that your `article.html` file renders *exactly* like the mockup!
-* Make sure you've answered all the questions for the reflection. Feel free to use your native language! Graders will translate if necessary.
-* Check your project against the [rubric](https://docs.google.com/document/d/15WAIw1U_e-Vr1-Iny6RiDdjlIDIDitm7yJmxBD6hiT0/pub).
-* Create a zip file containing `article.html` and `reflections.txt`.
-
-Good luck! I know that you can do it 🚀
\ No newline at end of file
diff --git a/fend-refresh/lesson2/quiz-first-element/correct.html b/fend-refresh/lesson2/quiz-first-element/correct.html
deleted file mode 100644
index f70815eb6..000000000
--- a/fend-refresh/lesson2/quiz-first-element/correct.html
+++ /dev/null
@@ -1,23 +0,0 @@
-<!--
-This is a comment. Note the special tags. You can type whatever you want
-in a comment. You can leave notes for yourself or other people with it.
--->
-
-<!--
-I want you to make three elements:
-* One paragraph
-* Two spans
-Make sure you put some text content in every element!
-
-When you're ready to test, click "Test run" button to see how your page looks.
-When you're ready to submit, click "Submit" button to get feedback!
--->
-
-<!--
-Here's an example element:
-<tag>content</tag>
--->
-
-<p>Cameron Pittman</p>
-<span>is freaking </span>
-<span>sweeeeet 💩</span>
diff --git a/fend-refresh/lesson2/quiz-first-element/start.html b/fend-refresh/lesson2/quiz-first-element/start.html
deleted file mode 100644
index 3c6b2aedc..000000000
--- a/fend-refresh/lesson2/quiz-first-element/start.html
+++ /dev/null
@@ -1,19 +0,0 @@
-<!--
-This is a comment. Note the special tags. You can type whatever you want
-in a comment. You can leave notes for yourself or other people with it.
--->
-
-<!--
-I want you to make three elements:
-* One paragraph
-* Two spans
-Make sure you put some text content in every element!
-
-When you're ready to test, click "Test run" button to see how your page looks.
-When you're ready to submit, click "Submit" button to get feedback!
--->
-
-<!--
-Here's an example element:
-<tag>content</tag>
--->
diff --git a/fend-refresh/lesson2/quiz-first-element/unit_tests.js b/fend-refresh/lesson2/quiz-first-element/unit_tests.js
deleted file mode 100644
index a26ff21d8..000000000
--- a/fend-refresh/lesson2/quiz-first-element/unit_tests.js
+++ /dev/null
@@ -1,86 +0,0 @@
-function performSubmission() {
-  var grader = new Grader();
-
-  grader.addTest(function() {
-    return grader.elemDoesExist('p');
-  }, {
-    wrongMessage: 'Looks like you\'re missing a paragraph element! Use `<p>` to start it and then close it with `</p>`.'
-  });
-
-  grader.addTest(function() {
-    return grader.elemDoesExist('span');
-  }, {
-    wrongMessage: 'Looks like you\'re missing a span element! Use `<span>` to start one and `</span>` to close it.'
-  }, false);
-
-  grader.addTest(function() {
-    var hasText = false;
-    $.each($('p'), function(i, e) {
-      if (e.innerText.length > 0) {
-        if (i === 0) {
-          hasText = true;
-        } else {
-          hasText = hasText && true;
-        }
-      } else {
-        hasText = hasText && false;
-      }
-    });
-    return hasText;
-  }, {
-    wrongMessage: 'The paragraph needs to have some text content! Add whatever you\'d like :)'
-  });
-
-  grader.addTest(function() {
-    var hasText = false;
-    $.each($('span'), function(i, e) {
-      if (e.innerText.length > 0) {
-        if (i === 0) {
-          hasText = true;
-        } else {
-          hasText = hasText && true;
-        }
-      } else {
-        hasText = hasText && false;
-      }
-    });
-    return hasText;
-  }, {
-    wrongMessage: 'Every span some text content! Add whatever you\'d like :)'
-  }, false);
-
-  if ($('p').length > 1) {
-    grader.addTest(function() {
-      return true;
-    }, {
-      comment: 'Looks like you added more than enough paragraphs :)'
-    });
-  }
-
-  grader.addTest(function() {
-    if ($('span').length >= 2) {
-      return true;
-    } else {
-      return false;
-    }
-  }, {
-    wrongMessage: 'There should be two span elements on the page.'
-  }, false);
-
-  if ($('span').length > 2) {
-    grader.addTest(function() {
-      return true;
-    }, {
-      comment: 'Looks like you added more than enough spans :)'
-    });
-  }
-
-  grader.runTests();
-
-  return {
-    is_correct: grader.isCorrect,
-    test_feedback: grader.getFormattedWrongMessages('\n'),
-    test_comments: grader.getFormattedComments('\n'),
-    congrats: "Congratulations! You made your first elements!"
-  }
-}
\ No newline at end of file
diff --git a/fend-refresh/lesson2/quiz-research/correct.html b/fend-refresh/lesson2/quiz-research/correct.html
deleted file mode 100644
index 02df5167c..000000000
--- a/fend-refresh/lesson2/quiz-research/correct.html
+++ /dev/null
@@ -1,2 +0,0 @@
-<p><strong>This text should be bold.</strong></p>
-<p><em>And this text should have emphasis (italics).</em></p>
\ No newline at end of file
diff --git a/fend-refresh/lesson2/quiz-research/start.html b/fend-refresh/lesson2/quiz-research/start.html
deleted file mode 100644
index 1d9513443..000000000
--- a/fend-refresh/lesson2/quiz-research/start.html
+++ /dev/null
@@ -1,2 +0,0 @@
-<p>This text should be bold.</p>
-<p>And this text should have emphasis (italics).</p>
diff --git a/fend-refresh/lesson2/quiz-research/unit_tests.js b/fend-refresh/lesson2/quiz-research/unit_tests.js
deleted file mode 100644
index 7ec34b2f7..000000000
--- a/fend-refresh/lesson2/quiz-research/unit_tests.js
+++ /dev/null
@@ -1,92 +0,0 @@
-function performSubmission() {
-  var boldGrader = new Grader();
-  var emphasisGrader = new Grader();
-
-  boldGrader.addTest(function() {
-    var gotBold = boldGrader.elemDoesExist('strong') || boldGrader.elemDoesExist('b');
-    return gotBold;
-  }, {
-    wrongMessage: 'Looks like you aren\'t making any text bold! Search for "bold" to find two options!'
-  }, false);
-
-  emphasisGrader.addTest(function() {
-    var gotItalics = emphasisGrader.elemDoesExist('em') || emphasisGrader.elemDoesExist('i');
-    return gotItalics;
-  }, {
-    wrongMessage: 'Looks like you aren\'t emphasizing any text! Search for "emphasis" to find the right tag.'
-  }, false);
-
-  if (boldGrader.elemDoesExist('b')) {
-    boldGrader.addTest(function() {
-      return true;
-    }, {
-      comment: 'Looks like you\'re using the `b` tag for bold. That works but there is a better option. Search for the "strong" element.'
-    });
-  }
-
-  if (emphasisGrader.elemDoesExist('i')) {
-    emphasisGrader.addTest(function() {
-      return true;
-    }, {
-      comment: 'Looks like you\'re using the `i` tag for italics. That works but it is not recommended. Search for "emphasis" to find a better element.'
-    });
-  }
-
-  if ($('strong').length > 1 || $('b').length > 1) {
-    boldGrader.addTest(function() {
-      return true;
-    }, {
-      comment: 'You only need one bold element :)'
-    });
-  }
-
-  if ($('em').length > 0 || $('i').length > 0) {
-    emphasisGrader.addTest(function() {
-      return true;
-    }, {
-      comment: 'You only need one emphasized element :)'
-    });
-  }
-
-  var boldElem = {};
-  boldGrader.elemDoesExist('strong') ? boldElem = $('strong') : boldElem = $('b');
-
-  var emphasisElem = {};
-  emphasisGrader.elemDoesExist('em') ? emphasisElem = $('em') : emphasisElem = $('i');
-
-  boldGrader.addTest(function() {
-    var hasText = false;
-    $.each(boldElem, function(i, elem) {
-      console.log(elem.innerText);
-      if (elem.innerText.length > 0) {
-        hasText = true;
-      }
-    });
-    return hasText;
-  }, {
-    wrongMessage: 'There should be something inside your bold element. It can be anything!'
-  });
-
-  emphasisGrader.addTest(function() {
-    var hasText = false;
-    $.each(emphasisElem, function(i, elem) {
-      if (elem.innerText.length > 0) {
-        hasText = true;
-      }
-    });
-    return hasText;
-  }, {
-    wrongMessage: 'There should be something inside your emphasized element. It can be anything!'
-  });
-
-  boldGrader.runTests();
-  emphasisGrader.runTests();
-
-  // return an object like the one below:
-  return {
-    is_correct: boldGrader.isCorrect && emphasisGrader.isCorrect,
-    test_feedback: boldGrader.getFormattedWrongMessages('\n') + '\n' + emphasisGrader.getFormattedWrongMessages('\n'),
-    test_comments: boldGrader.getFormattedComments('\n') + '\n' + emphasisGrader.getFormattedComments('\n'),
-    congrats: 'Awesome! Great job researching elements!'
-  }
-}
diff --git a/fend-refresh/lesson2/quiz-whats-wrong/quiz1.html b/fend-refresh/lesson2/quiz-whats-wrong/quiz1.html
deleted file mode 100644
index e69de29bb..000000000
diff --git a/fend-refresh/lesson2/text-editors.md b/fend-refresh/lesson2/text-editors.md
deleted file mode 100644
index dd75f25c5..000000000
--- a/fend-refresh/lesson2/text-editors.md
+++ /dev/null
@@ -1,97 +0,0 @@
-There are many editors that can write plain text. In fact, you have one installed already regardless of the kind of computer you're using.
-
-If you're on a PC, you have Notepad.
-
-If you're on a Mac, you have TextEdit.
-
-If you're using a Linux distribution, you have at least a command line text editor like [Nano](https://en.wikipedia.org/wiki/GNU_nano) or [Vi](https://en.wikipedia.org/wiki/Vi). Some distributions might have a [GUI](https://en.wikipedia.org/wiki/Graphical_user_interface) text editor installed as well.
-
-While regular text editors work, they are slow because you have to type each and every character manually. When writing code, you'll notice pretty quickly that code structure is repetitive - you'll be writing code that looks the same over and over and over.
-
-A regular text editor, like TextEdit or Notepad, isn't going to help you out. But text editors made for code will help you out with colorful syntax highlighting, auto-completing common blocks of code, automatic formatting and other ways you can't even imagine yet.
-
-There is no "best" text editor. It's all a matter of personal preference. I want you to download at least two of these and try them out to see what you like.
-
-### Sublime Text 3
-
-![sublime text logo](http://lh3.googleusercontent.com/8Udjv0wO3zFYMe_BVzUu-4gWKrMUsTsKqoSa0cS2LxuYT61TUWzoCjaG6swcQKvuP6Sfmfatf0LpAXzYOw=s128)
-
-**Windows, Mac, Linux**
-
-**Cost**: $70USD (but free to try indefinitely with pop-ups)
-
-**Style**: GUI
-
-[Website](http://www.sublimetext.com/3)
-
-Sublime Text is fast, lightweight and easily customizable. With tons of keyboard shortcuts, multiple cursors and a huge ecosystem of plugins, you can create the perfect workflow.
-
-However, updates to Sublime Text have recently started to slow, which makes some developers concerned. Many are flocking to...
-
-### Atom
-
-![atom logo](//lh3.googleusercontent.com/0JrchJgRdYBuPmah4Cdt-Fm4-7VIdbMtwW86zQB5DvmeMqRTsegnSH_3WhhElmZ_QXh9gk5o0xK7aVU6bg=s128)
-
-**Windows, Mac, Linux**
-
-**Cost**: Free
-
-**Style**: GUI
-
-[Website](https://atom.io/)
-
-Made by GitHub and a relative newcomer on the text editor scene, Atom looks and feels similar to Sublime Text. Both feature multiple cursors and they share many of the same keyboard shortcuts. Also much like Sublime Text, Atom has a rich ecosystem of packages that you can use to customize your editor to your heart's content.
-
-Both Atom and Sublime Text are hugely popular and the majority of web developers that you'll meet will probably be using one or the other.
-
-### Notepad++
-
-![notepad++ logo](//lh3.googleusercontent.com/nI-kf5czqPchtT2Duexb1Yxvyd1tfQrgmQgbJKj9bNLSv4NG3jaI6trKXTh-gGgE6zGRMas4jYzV3f7LNw=s128)
-
-**Windows**
-
-**Cost**: Free
-
-**Style**: GUI
-
-[Website](https://notepad-plus-plus.org/)
-
-A classic lightweight text editor, Notepad++ has been around since 2000.
-
-Notepad++'s plugin ecosystem is not as large as Atom's or Sublime Text's, but many people like its clean (perhaps old school?) presentation.
-
-### Emacs
-
-![emacs logo](//lh3.googleusercontent.com/HYa9OqTjAgVtJSjCo1QmVa0jGYk7HXejbZ3E0I5HGj6az4yVkftpIO022L6IZ5O86SzcpEZpEy3A8ErXqS2t=s128)
-
-**Windows, Mac, Linux**
-
-**Cost**: Free
-
-**Style**: Command-Line or GUI
-
-[Website](https://www.gnu.org/software/emacs/) or [Aquamacs](http://aquamacs.org/) (for OS X)
-
-Emacs is an open source text editor that's been around since the 1970s. Along with Vim, it's one of the most popular Linux text editors.
-
-Emacs is often described as an operating system because even in a clean install there are several included applications that you wouldn't expect inside a text editor, like a news reader, several calculators, a number of games, file encryption/decryption, and a package manager for plugins written in [Emacs Lisp](https://en.wikipedia.org/wiki/Emacs_Lisp).
-
-All Emacs commands exist in the same namespace so it's not uncommon to differentiate commands by having chains of keystrokes like C-x C-f (Control - x, Control - f) to open a file. Because of the incredible customizability, it's among the editors with the steepest learning curves. You will most like want to customize it: installing plugins, trying them, testing for conflicts, uninstalling the ones that have conflicts, and repeating.
-
-### Vi/Vim
-
-![vim logo](//lh3.googleusercontent.com/sHAkDC3LVT63BBkNutZcCTQxrZGZbnU87Sj2KrTj2ZoQ2ZziN4rT1fe96nXlaeB-LWcynw21eGFNy9kkh-4=s128)
-
-**Windows, Mac, Linux**
-
-**Cost**: Free and open source
-
-**Style**: Command Line or GUI
-
-[Website](http://www.vim.org/index.php)
-
-Vim, or Vi IMproved is the other text editor in the [Unix Editor Wars](https://en.wikipedia.org/wiki/Editor_war).
-
-Vim runs anywhere that standard C can run and is often in the base install for most Linux and non-Windows systems including Mac OS X. It also offers a fairly robust [tutorial](http://www.openvim.com/) to learn how to use it. Learn it once and you can use it everywhere.
-
-*For experienced students (everyone else, it's ok if you don't understand this right now):* Vim relies on modes, or scopes, when certain commands are applicable. In the command mode, the user can move around a file or execute commands. For instance, in insert mode, you can edit a file. While you are creating a HTML file (and are in HTML mode), you might be able to expand `html:5` into the boilerplate for an empty HTML file.
diff --git a/fend-refresh/lesson2/trees/l2-trees.html b/fend-refresh/lesson2/trees/l2-trees.html
deleted file mode 100644
index 3e4244f45..000000000
--- a/fend-refresh/lesson2/trees/l2-trees.html
+++ /dev/null
@@ -1,6 +0,0 @@
-<div>
-  <h1>Article Title</h1>
-  <p>Paragraph of text.</p>
-</div>
-
-  <div><h1>Article Title</h1></div>
diff --git a/fend-refresh/lesson6-part2/1floats.md b/fend-refresh/lesson6-part2/1floats.md
deleted file mode 100644
index 9f327eb4c..000000000
--- a/fend-refresh/lesson6-part2/1floats.md
+++ /dev/null
@@ -1,74 +0,0 @@
-First off, floats are not a positioning value. They are a wholly different flow on the page created by a new property, `float`.
-
-Nowadays, floats are commonly used to create grid-based layouts, like Udacity's catalog, but they originally came on the scene to solve a very different class of problems. Let's take a quick history lesson so that the quirks of `float` seem less quirky :)
-
-<<img of catalog w/grid pointed out>>
-Get used to spotting grids! They're all over the web. Here's the grid on our catalog page (as of 23 August 2016).
-
-### Why Do Floats Exist?
-
-Remember that the web began as a way to display, share and find text documents. Early websites mimicked printed text. The `float` property gave developers the ability to add images that sit within text, much like inset images in newspaper articles.
-
-`float` creates a new flow on the page with a unique behavior:
-
-> ### Normal flow line boxes respect the boundaries of floated elements, but normal flow block elements ignore floats.
-
-This lets you embed images within a block a text without affecting the overall layout of the page. Let me show you an example.
-
-<<img carl sagan page>>
-The two images appear to be floating inside the text.
-
-You’ve probably seen something like this before. [This site](http://udacity.github.io/fend/fend-refresh/lesson6-part2/float-left-example.html) demonstrates the original purpose of floats.
-
-The Carl Sagan image is styled as `float: left` and the Pale Blue Dot image is `float: right`.
-
-The inline text wraps around the images, which seem to be floating in the page's text. The block paragraph elements, on the other hand, ignore the floats and take up as much space as they normally would. If you open developer tools, you'll see that the paragraphs extend behind the images.
-
-<<img of p element behind the images>>
-Paragraphs ignore the floats.
-
-Here's the HTML behind this example. Nothing fancy here except the two `float` properties.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Float Example</title>
-      <style>
-        body {
-          width: 640px;
-          margin: 0 auto;
-        }
-        img {
-          height: 200px;
-        }
-        .left {
-          float: left;
-          margin-right: 8px;
-        }
-        .right {
-          float: right;
-          margin-left: 8px;
-        }
-      </style>
-    </head>
-    <body>
-      <h1>Carl Sagan</h1>
-
-      <p>...</p>
-
-      <img class="left" src="images/Carl_Sagan_Planetary_Society.jpg" alt="Carl Sagan by NASA/JPL [Public domain], via Wikimedia Commons">
-
-      <p>...</p>
-
-      <img class="right" src="images/256px-PaleBlueDot.jpg" alt="Pale Blue Dot - Earth as seen through one of Saturn's rings">
-
-      <p>...</p>
-
-      <p>...</p>
-
-      <p>...</p>
-    </body>
-    </html>
-
-Developers eventually realized the float flow has some unique properties that make it perfect for creating responsive, grid-based layouts. Keep going to see how.
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/2many-floats.md b/fend-refresh/lesson6-part2/2many-floats.md
deleted file mode 100644
index 6d058a171..000000000
--- a/fend-refresh/lesson6-part2/2many-floats.md
+++ /dev/null
@@ -1,124 +0,0 @@
-Developers realized that something interesting happens with multiple floats on the page. While floats ignore block elements, they respect the boundaries of other float elements.
-
-Here is a website with multiple `float: left` and `float: right` elements.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Floats Left and Right</title>
-      <style>
-        @font-face {
-          font-family: 'Menlo Regular';
-          font-style: normal;
-          font-weight: normal;
-          src: local('Menlo Regular'), url('fonts/Menlo-Regular.woff') format('woff');
-        }
-        * {
-          box-sizing: border-box;
-          font-family: 'Menlo Regular', monospace;
-          font-weight: bold;
-        }
-        div {
-          font-size: 44pt;
-          border: 6px solid #2e3d49;
-          width: 5em;
-          text-align: center;
-        }
-        .left {
-          float: left;
-        }
-        .right {
-          float: right;
-        }
-        .green {
-          background-color: #89D698;
-        }
-        .blue {
-          background-color: #89D0E5;
-        }
-      </style>
-    </head>
-    <body>
-      <div class="left 1 green">.left.1</div>
-      <div class="right 2 blue">.right.2</div>
-      <div class="left 3 green">.left.3</div>
-      <div class="right 4 blue">.right.4</div>
-    </body>
-    </html>
-
-Here's how the site looks.
-
-<<img many floats>>
-See how the floats stack next to each other?
-
-Notice how the floats stack on one another in the order that they appear in HTML. This animation gives you an idea of how the elements end up where they do.
-
-<video width="100%" controls loop >
-  <source src="https://s3.amazonaws.com/content.udacity-data.com/courses/fend/floats-left-right.mp4" type="video/mp4">
-  Your browser does not support the video tag. <a href="https://s3.amazonaws.com/content.udacity-data.com/courses/fend/floats-left-right.mp4" target="_blank">Click here to see the animation.</a>
-</video>
-*See how they slide into place!*
-
-Regardless of `float: left` or `float: right`, all floats respect each other's space. Try widening the floats in the previous quiz (bump up the `width` of `div`) and you'll see that once floats push against each other, they wrap to the next line. Here's an example that demonstrates just that.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Floats Left and Right</title>
-      <style>
-        @font-face {
-          font-family: 'Menlo Regular';
-          font-style: normal;
-          font-weight: normal;
-          src: local('Menlo Regular'), url('fonts/Menlo-Regular.woff') format('woff');
-        }
-        * {
-          box-sizing: border-box;
-          font-family: 'Menlo Regular', monospace;
-          font-weight: bold;
-        }
-        div {
-          font-size: 44pt;
-          border: 6px solid #2e3d49;
-          width: 5em;
-          text-align: center;
-        }
-        .left {
-          float: left;
-        }
-        .green {
-          background-color: #89D698;
-        }
-        .blue {
-          background-color: #89D0E5;
-        }
-      </style>
-    </head>
-    <body>
-      <div class="left green">.left</div>
-      <div class="left blue">.left</div>
-      <div class="left green">.left</div>
-      <div class="left blue">.left</div>
-      <div class="left green">.left</div>
-      <div class="left blue">.left</div>
-      <div class="left green">.left</div>
-      <div class="left blue">.left</div>
-      <div class="left green">.left</div>
-      <div class="left blue">.left</div>
-      <div class="left green">.left</div>
-      <div class="left blue">.left</div>
-      <div class="left green">.left</div>
-      <div class="left blue">.left</div>
-      <div class="left green">.left</div>
-      <div class="left blue">.left</div>
-    </body>
-    </html>
-
-This example probably looks much like you expected.
-
-<<img of floats that have wrapped>>
-Lots and lots of floats!
-
-Now that you've seen the basic concepts, on the next page you'll be experimenting with floats inside parents.
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/3quiz-floats-parents.md b/fend-refresh/lesson6-part2/3quiz-floats-parents.md
deleted file mode 100644
index 1b040fa1f..000000000
--- a/fend-refresh/lesson6-part2/3quiz-floats-parents.md
+++ /dev/null
@@ -1,55 +0,0 @@
-I want you to learn through experimentation! In the previous examples, you saw floats directly inside the `<body>`. I want you to extend your knowledge of floats by experimenting with a float inside a parent.
-
-For this quiz, you'll be drawing a conclusion about the behavior of floats - do elements in the float flow respect (i.e. stay within) their normal flow parent's borders? Or do they float with respect to the `document`, regardless of container?
-
-Below, you'll find the HTML for [this site](http://udacity.github.io/fend/fend-refresh/lesson6-part2/float-with-parent.html). Head over to it and add `float: right` to `.child` with developer tools (try `float: left` too!). After you've seen the result, come back and answer the question at the bottom of this page.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Float with Parent</title>
-      <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-      <style>
-        * {
-          box-sizing: border-box;
-          font-family: 'Source Sans Pro', sans-serif;
-          font-weight: bold;
-          font-size: 14pt;
-        }
-        .bordered {
-          border: 2px solid #2e3d49;
-        }
-        .parent {
-          width: 50%;
-        }
-        .child {
-          width: 10em;
-        }
-      </style>
-    </head>
-    <body>
-      <div class="parent bordered">
-        <div class="child bordered">child</div>
-      </div>
-    </body>
-    </html>
-
-
-Do floats respect the borders of their containers?
-
-A) Yes! Floated elements stay within the height and width of their containers.
-
-- Not quite! This statement is not entirely true.
-
-B) Nope. Floated elements ignore their containers completely.
-
-- Not quite! Floats somewhat respect the boundaries of the containers.
-
-C) Maybe? Floated elements stay within their containers width, but not their height.
-
-- Yes! This is a weird problem. You'll find out what's going on next.
-
-D) Maybe? Floated elements stay within their containers height, but not their width.
-
-- Not quite! You're right that something weird is going on, but floated elements do respect the width of their containers.
diff --git a/fend-refresh/lesson6-part2/4clearing.md b/fend-refresh/lesson6-part2/4clearing.md
deleted file mode 100644
index 2aef14e0e..000000000
--- a/fend-refresh/lesson6-part2/4clearing.md
+++ /dev/null
@@ -1,183 +0,0 @@
-Remember, floats are outside the normal flow. In the previous quiz, you saw that despite the fact that the child float had a height, the parent *did not have a height*!
-
-> ### Float children are *not* involved in the box-size calculation of normal flow parents.
-
-If a container only contains a float child, the container will *not* have a height by default - the height has to be set some other way, such as with normal flow content or the `height` property.
-
-This makes sense in some ways, but it's surprising in others. Given what you know about interactions between the normal flow and the float flow, you shouldn't be surprised that normal flow block elements ignore the size of child float elements when calculating box size. However, if you were, say, creating a page layout using floats, it would be reasonable to assume that a sibling to a parent element with float children would respect the boundaries of the children.
-
-Let me show you.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Parent with Siblings and Float Children</title>
-      <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-      <style>
-        * {
-          box-sizing: border-box;
-          font-family: 'Source Sans Pro', sans-serif;
-          font-weight: bold;
-          font-size: 14pt;
-        }
-        .bordered {
-          border: 2px solid #2e3d49;
-        }
-        .child {
-          background-color: #15A222;
-        }
-        .sibling {
-          background-color: #D16906;
-        }
-        .left {
-          float: left;
-        }
-      </style>
-    </head>
-    <body>
-      <div class="bordered parent">
-        <div class="bordered child left">Child</div>
-        <div class="bordered child left">Child</div>
-      </div>
-      <div class="bordered sibling">Sibling to the parent</div>
-    </body>
-    </html>
-
-At a glance, the HTML seems to say that the sibling, `.sibling`, will be displayed below the parent and its children. Of course, that's not true. Here's how it looks.
-
-<<img of parents sibling>>
-While the sibling is below the parent, it isn't below the parent's child float elements.
-
-If you're using floats to create a layout (as you will be soon), this is undesired behavior. There are a few ways to work around it and force elements in the normal flow to respect the boundaries of floats.
-
-### Strategy 1: Block Formatting Contexts
-
-This strategy forces normal flow **siblings** to respect the boundaries of floats. Elements with a block formatting context (remember those from last lesson!) may not overlap floats.
-
-This rule originally protected elements like `<table>`, which create their own block formatting context, from being invaded by floats. The reasoning behind this is that you wouldn't want a random image to push aside all the text inside a carefully built table.
-
-You can take advantage of this rule - if you force elements to establish a block formatting context, they'll respect the boundaries of the float.
-
-In [this example](http://udacity.github.io/fend/fend-refresh/lesson6-part2/float-block-formatting.html), I'm using the `overflow` property to set a block formatting context (any value other than `visible`, including `auto`, forces an element to take on a block formatting context).
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Block Formatting Context</title>
-      <style>
-        * {
-          box-sizing: border-box;
-          font-family: 'Source Sans Pro', sans-serif;
-          font-weight: bold;
-          font-size: 14pt;
-        }
-        .child {
-          background-color: #15A222;
-        }
-        .bordered {
-          border: 2px solid #2e3d49;
-        }
-        .block-context {
-          overflow: auto;
-          background-color: #D16906;
-        }
-        .left {
-          float: left;
-        }
-      </style>
-    </head>
-    <body>
-      <div class="parent">
-        <div class="child left">Child</div>
-        <div class="child left">Child</div>
-        <div class="bordered block-context">New context</div>
-      </div>
-    </body>
-    </html>
-
-<<img of example>>
-There's no overlap between the new context and the two float children.
-
-With `overflow: auto`, the "new context" element respects the boundaries of the two children. No overlap! Try toggling `overlap: auto` to see what happens if it isn't applied.
-
-You can take this a step further with a property called `clear`.
-
-### Strategy 2: Clearing
-
-By default, line boxes clear out space for float elements. "Clear," in this case, means that they move out of the way for floats. You can control how siblings interact with floats with `clear`.
-
-`clear: left` indicates that the top of the element must be below any left floated elements that appear before this one in the document. `clear: right` acts the same, but with right floated elements. `clear: none` means that there are no restrictions; this is the default value.
-
-`clear: both` is interesting - it indicates that the element must be below *any* floated elements that appear earlier in the document.
-
-Let me demonstrate. There are four examples in this HTML.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Block Formatting Context</title>
-      <style>
-        * {
-          box-sizing: border-box;
-          font-family: 'Source Sans Pro', sans-serif;
-          font-weight: bold;
-          font-size: 14pt;
-        }
-        div:nth-child(even):not(.left):not(.right) {
-          background-color: #128FC2;
-        }
-        div:nth-child(odd):not(.left):not(.right) {
-          background-color: #15A222;
-        }
-        .bordered {
-          border: 2px solid #2e3d49;
-        }
-        .left {
-          float: left;
-          background-color: #FD9F0E;
-        }
-        .right {
-          float: right;
-          background-color: #FD9F0E;
-        }
-        .clear-left {
-          clear: left;
-        }
-        .clear-right {
-          clear: right;
-        }
-        .clear-both {
-          clear: both;
-        }
-        .wide {
-          width: 40%;
-        }
-      </style>
-    </head>
-    <body>
-      <!-- example 1 -->
-      <div class="bordered left">Left ← Left ← Left</div>
-      <div class="bordered clear-left">This element has been clear left'ed.</div>
-
-      <!-- example 2 -->
-      <div class="bordered right">Right → Right → Right</div>
-      <div class="bordered clear-right">This element has been clear right'ed.</div>
-
-      <!-- example 3 -->
-      <div class="left bordered">Left ← Left ← Left</div>
-      <div class="bordered">Not cleared at all!</div>
-
-      <!-- example 4 -->
-      <div class="bordered left wide">Left ← Left ← Left ← Really wide.</div>
-      <div class="bordered right wide">Right → Right → Right. Really wide.</div>
-      <div class="bordered clear-both">This element has been clear both'ed.</div>
-    </body>
-    </html>
-
-<<img of clears>>
-There is clearly a difference to the behaviors of different clears. (Sorry for the bad pun :P)
-
-There's one more technique: the clearfix. But before we get to it, I want you to practice clearing floats.
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/5clear-quiz.md b/fend-refresh/lesson6-part2/5clear-quiz.md
deleted file mode 100644
index c76157d3f..000000000
--- a/fend-refresh/lesson6-part2/5clear-quiz.md
+++ /dev/null
@@ -1,21 +0,0 @@
-Let's go back to the example site you saw at the beginning of the last page. I want you to use developer tools to fix it so that the `.sibling` element appears underneath the two "Child" divs.
-
-<<img of the site as it should look>>
-This is how I want the site to look.
-
-You should only need to add one CSS property.
-
-### Instructions
-
-1. Open this site in your favorite browser. Make sure your Udacity Feedback extension is on.
-2. Add CSS to make `.sibling` render below the floats.
-3. Get a code from the extension and paste it into the box below!
-
-// right
-Nice job! But clearly, the page looks a little weird. The parent is still collapsed. Learn how to fix that on the next page!
-
-// wrong
-Doesn't look like the right code. It should appear in the Udacity Feedback extension widget.
-
-// nada
-You can do it! Just add some CSS to .sibling.
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/6pseudoelements.md b/fend-refresh/lesson6-part2/6pseudoelements.md
deleted file mode 100644
index 1733287b2..000000000
--- a/fend-refresh/lesson6-part2/6pseudoelements.md
+++ /dev/null
@@ -1,66 +0,0 @@
-Before we get into the third technique for clearing, you need a quick primer on something called a [pseudo-element](https://developer.mozilla.org/en-US/docs/Web/CSS/Pseudo-elements).
-
-### Pseudo-elements
-
-The DOM is mutable (changeable). The magic of JavaScript (which you'll probably be learning about soon) is that it allows you to modify the DOM on the fly, effectively changing the way a live site renders.
-
-CSS can also mutate the DOM using something called a **pseudo-element**. A pseudo-element is an element that is actually *created with CSS* and then rendered like a normal element. Let me show you [an example](http://udacity.github.io/fend/fend-refresh/lesson6-part2/pseudoelements.html).
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Pseudo-elements Example</title>
-      <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-      <style>
-        * {
-          box-sizing: border-box;
-          font-family: 'Source Sans Pro', sans-serif;
-          font-weight: bold;
-          font-size: 14pt;
-        }
-        .bordered {
-          border: 2px solid #2e3d49;
-        }
-        .child {
-          background-color: #15A222;
-        }
-        .child:after {
-          content: 'Pseudo-element!';
-          display: block;
-        }
-      </style>
-    </head>
-    <body>
-      <div class="parent">Parent
-        <div class="child bordered">Child</div>
-      </div>
-    </body>
-    </html>
-
-Here's how it looks.
-
-<<img of pseudo-element>>
-Notice that the pseudo-element is inside the child.
-
-The pseudo-element is created with `:after` inside the CSS on the element that I want to mutate. Another option would be `:before`. You can see that `:after` is rendered as a child of `.child` because it shares the background color of `.child` and is rendered inside the child's border. If you open developer tools, you'll also see that it's inside the child.
-
-<<img of :after in devtools>>
-More evidence that the pseudo-element is rendered as a child.
-
-In effect, the pseudo-element is extra content that is added to the element. Without the `content` property, the pseudo-element *disappears*! Watch.
-
-<video width="100%" controls loop >
-  <source src="https://s3.amazonaws.com/content.udacity-data.com/courses/fend/pseudo-element-disappears.mp4" type="video/mp4">
-  Your browser does not support the video tag. <a href="https://s3.amazonaws.com/content.udacity-data.com/courses/fend/pseudo-element-disappears.mp4" target="_blank">Click here to see the animation.</a>
-</video>
-*One click and it's gone!*
-
-You can, of course, style pseudo-elements with whatever CSS properties you'd like. In this case, I added `display: block` so that the pseudo-element would take its own line. If you remove it, you'll see that it behaves like an inline element instead.
-
-Pseudo-elements are useful in a many situations. I find myself using them most off as accents. For instance, the green ✓ and red ✗ that appear in the Udacity Feedback widget are `:before` pseudo-elements! [*Accurate with the current build of the widget as of August 2016.*]
-
-<<img of pseudo-element check mark w/devtools open>>
-A pseudo-element in the wild!
-
-Keep going to see how a pseudo-element can be used to clear floats.
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/7clearfix.md b/fend-refresh/lesson6-part2/7clearfix.md
deleted file mode 100644
index 99612c068..000000000
--- a/fend-refresh/lesson6-part2/7clearfix.md
+++ /dev/null
@@ -1,165 +0,0 @@
-Back to technqiues for clearing, here's the third.
-
-### Strategy 3: Clearfix
-
-Once more, let's look at the HTML of the normal flow parent with a float child and a normal flow sibling.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Parent with Siblings and Float Children</title>
-      <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-      <style>
-        * {
-          box-sizing: border-box;
-          font-family: 'Source Sans Pro', sans-serif;
-          font-weight: bold;
-          font-size: 14pt;
-        }
-        .bordered {
-          border: 2px solid #2e3d49;
-        }
-        .left {
-          float: left;
-        }
-        .child {
-          background-color: #15A222;
-        }
-        .sibling {
-          background-color: #D16906;
-        }
-      </style>
-    </head>
-    <body>
-      <div class="bordered parent">
-        <div class="bordered child left">Child</div>
-        <div class="bordered child left">Child</div>
-      </div>
-      <div class="bordered sibling">Sibling to the parent</div>
-    </body>
-    </html>
-
-<<img of ^^^>>
-I'm sure you remember this.
-
-There is a commandment for software developers:
-
-> ### Thou shalt always write code that runs the way it reads.
-
-I've also seen this [written as](http://stackoverflow.com/questions/876089/who-wrote-this-programing-saying-always-code-as-if-the-guy-who-ends-up-maintai):
-
-> ### Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live.
-
-As a developer, you should always strive to write your code as clearly as possible. Keep surprises to a minimum. The example above breaks the commandment because the HTML seems to indicate that `.sibling` will be rendered underneath `.parent` and all of its children, but that's not what happens.
-
-The third technique to clear floats, clearfix, combines aspects of the first two. The goal of the clearfix is to make a normal flow parent resize its box model to fit all of the floats inside it. There are two general techniques to do so.
-
-1. Add an element with `clear: both` to the end of a parent. This ensures that the last element is a normal flow element that has been pushed below all the floats.
-2. Turn the parent into a block formatting context with an `overflow` property other than `visible`. The block formatting context respects the boundaries of floats and ensures the parent's box model encompasses float children.
-
-The first technqiue by itself, adding an HTML element with `clear: both`, violates the commandment of code clarity; HTML should be restricted to rendered content. However, applying the same technique with a pseudo-element works nicely. Here's how it looks.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Clearfix Example</title>
-      <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-      <style>
-        * {
-          box-sizing: border-box;
-          font-family: 'Source Sans Pro', sans-serif;
-          font-weight: bold;
-          font-size: 14pt;
-        }
-        .bordered {
-          border: 2px solid #2e3d49;
-        }
-        .clearfix:after {
-          content: '';
-          clear: both;
-          display: table;
-        }
-        .left {
-          float: left;
-        }
-        .parent {
-          background-color: #89D0E5;
-        }
-        .child {
-          background-color: #15A222;
-        }
-        .sibling {
-          background-color: #D16906;
-        }
-      </style>
-    </head>
-    <body>
-      <div class="bordered parent clearfix">
-        <div class="bordered child left">Child</div>
-        <div class="bordered child left">Child</div>
-      </div>
-      <div class="bordered sibling">Sibling to the parent</div>
-    </body>
-    </html>
-
-(I added a background color to `.parent` to make it stand out more.)
-
-Here's how [it looks](http://udacity.github.io/fend/fend-refresh/lesson6-part2/clearfix-example-pseudo.html)!
-
-<<img of clearfixed version!>>
-No surprises! Now the site reflects the structure of the HTML.
-
-This clearfix actually uses both technqiues - the pseudo-element has a block formatting context, forcing it to stay outside the bounds of the floats, and it clears both left and right floats.
-
-Here's how the second technique, giving the parent a block formatting context, looks.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Clearfix Example</title>
-      <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-      <style>
-        * {
-          box-sizing: border-box;
-          font-family: 'Source Sans Pro', sans-serif;
-          font-weight: bold;
-          font-size: 14pt;
-        }
-        .bordered {
-          border: 2px solid #2e3d49;
-        }
-        .clearfix {
-          overflow: auto;
-        }
-        .left {
-          float: left;
-        }
-        .parent {
-          background-color: #89D0E5;
-        }
-        .child {
-          background-color: #15A222;
-        }
-        .sibling {
-          background-color: #D16906;
-        }
-      </style>
-    </head>
-    <body>
-      <div class="bordered parent clearfix">
-        <div class="bordered child left">Child</div>
-        <div class="bordered child left">Child</div>
-      </div>
-      <div class="bordered sibling">Sibling to the parent</div>
-    </body>
-    </html>
-
-<<img of overflow clearfix>>
-This works too!
-
-The result is the same! That's good news.
-
-You just saw that there are two techniques to accomplish the same task. At this point, you should be asking yourself if one technique is better than the other. Great question. Keep going to the next quiz to investigate the side effects of clearfixes.
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/8clearfix-quiz.md b/fend-refresh/lesson6-part2/8clearfix-quiz.md
deleted file mode 100644
index ce6740324..000000000
--- a/fend-refresh/lesson6-part2/8clearfix-quiz.md
+++ /dev/null
@@ -1,44 +0,0 @@
-The two techniques for clearfix are:
-
-    .clearfix:after {
-      content: '';
-      clear: both;
-      display: table;
-    }
-
-and
-
-    .clearfix {
-      overflow: auto;
-    }
-
-If you were to decide which technique is better just based on the complexity of the two CSS classes, `overflow: auto` would win. It's much simpler. However, `overflow: auto` has a side effect. I'm not going to tell you what it is because I want you to figure that out for yourself in this quiz! But first, a little bit of background about `overflow`.
-
-### Overflow
-
-There are technically three different [overflow properties](https://developer.mozilla.org/en-US/docs/Web/CSS/overflow): `overflow`, `overflow-x` and `overflow-y`. These three properties determine what happens to content if its box model is larger than its parent's box model.
-
-The default option is `visible`, which means that the content is always rendered and may extend *outside* of its parent. Other options include `hidden`, `scroll` and `auto`. `hidden` does exactly what you think - it clips off any content that extends outside the parent's box model. `scroll` adds scroll bars to the parent, allowing the user to scroll around the parent element to access all the content. The behavior of `auto` depends on the browser.
-
-Keep this in mind as you go through the quiz.
-
-### Instructions
-
-1. Head to [this site](http://udacity.github.io/fend/fend-refresh/lesson6-part2/clearfix-overflow-quiz.html), which is using the `overflow: auto` clearfix.
-2. Open developer tools to determine which of the options below describes what could go wrong with `overflow: auto`. (Hint, `.row` has some commented out properties that you should try manipulating.)
-3. Answer the question below!
-
-What can go wrong with `overflow: auto`? Pick all that apply.
-
-* Shrinking the height of the parent, `.row`, added vertical scrollbars to the div.
-  * Right! This is the biggest problem with `overflow: auto`.
-  * Take another look at the first answer. Did you try shrinking the height of `.row`?
-
-* Shrinking the width of the parent added horizontal scrollbars to the div.
-  * Take a look at the second answer. Line boxes are designed to adjust to the width of their containers.
-
-* The parent is no longer resizable with `width` and `height`.
-  * Take a look at the third option. You can still set `width` and `height`.
-
-* All of the content is now scrollable by default.
-  * Take a look at the fourth option. Some content can be scrollable under the right circumstances, but it is not scrollable by default.
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/9outro.md b/fend-refresh/lesson6-part2/9outro.md
deleted file mode 100644
index f2bb11d7b..000000000
--- a/fend-refresh/lesson6-part2/9outro.md
+++ /dev/null
@@ -1,14 +0,0 @@
-> ### Thanks for finishing our positioning elements beta lesson!
-
-Congratuations! At this point, you've got a *professional* foundation of HTML and CSS. Seriously! Once you've finished this problem set, you'll have demonstrated enough working knowledge to tackle *any* design. Of course, there's much more to learn about CSS, namely responsive design techniques, but if you've made it this far you'll have *no problem* taking on more advanced CSS topics.
-
-Before I send you off to the problem set, I want you to see one more thing. Head back to the [example from the last quiz](http://udacity.github.io/fend/fend-refresh/lesson6-part2/clearfix-overflow-quiz.html). If you haven't already, I want you to resize the width of `.row`. This is what you'll see.
-
-<video width="100%" controls loop >
-  <source src="https://s3.amazonaws.com/content.udacity-data.com/courses/fend/clearfix-flow.mp4" type="video/mp4">
-  Your browser does not support the video tag. <a href="https://s3.amazonaws.com/content.udacity-data.com/courses/fend/clearfix-flow.mp4" target="_blank">Click here to see the animation.</a>
-</video>
-
-The layout changes as the width changes! This is the keystone technique for grid-based layouts, which you'll be exploring in the next lessons.
-
-But first, a problem set! Time to test out your new layout techniques.
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/clearfix-example-overflow.html b/fend-refresh/lesson6-part2/clearfix-example-overflow.html
deleted file mode 100644
index 22f0413f8..000000000
--- a/fend-refresh/lesson6-part2/clearfix-example-overflow.html
+++ /dev/null
@@ -1,41 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Clearfix Example</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-      font-size: 14pt;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    .clearfix {
-      overflow: auto;
-    }
-    .parent {
-      background-color: #89D0E5;
-    }
-    .child {
-      background-color: #15A222;
-    }
-    .sibling {
-      background-color: #D16906;
-    }
-    .left {
-      float: left;
-    }
-  </style>
-</head>
-<body>
-  <div class="bordered parent clearfix">
-    <div class="bordered child left">Child</div>
-    <div class="bordered child left">Child</div>
-  </div>
-  <div class="bordered sibling">Sibling to the parent</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/clearfix-example-pseudo.html b/fend-refresh/lesson6-part2/clearfix-example-pseudo.html
deleted file mode 100644
index 06cdffc8f..000000000
--- a/fend-refresh/lesson6-part2/clearfix-example-pseudo.html
+++ /dev/null
@@ -1,43 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Clearfix Example</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-      font-size: 14pt;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    .clearfix:after {
-      content: '';
-      clear: both;
-      display: table;
-    }
-    .parent {
-      background-color: #89D0E5;
-    }
-    .child {
-      background-color: #15A222;
-    }
-    .sibling {
-      background-color: #D16906;
-    }
-    .left {
-      float: left;
-    }
-  </style>
-</head>
-<body>
-  <div class="bordered parent clearfix">
-    <div class="bordered child left">Child</div>
-    <div class="bordered child left">Child</div>
-  </div>
-  <div class="bordered sibling">Sibling to the parent</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/clearfix-overflow-quiz.html b/fend-refresh/lesson6-part2/clearfix-overflow-quiz.html
deleted file mode 100644
index 5689e5723..000000000
--- a/fend-refresh/lesson6-part2/clearfix-overflow-quiz.html
+++ /dev/null
@@ -1,52 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Clearfix Overflow Quiz</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-      font-size: 14pt;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    .row {
-      overflow: auto;
-      background-color: #89D0E5;
-      /*width: 100%;*/
-      /*height: 100%;*/
-    }
-    .left {
-      float: left;
-    }
-    .child {
-      width: 10em;
-      height: 50px;
-      margin: 8px;
-      padding: 8px;
-    }
-    .child:nth-child(even) {
-      background-color: #15A222;
-    }
-    .child:nth-child(odd) {
-      background-color: #D16906;
-    }
-  </style>
-</head>
-<body>
-  <div class="row bordered clearfix">
-    <div class="left bordered child">This floats left.</div>
-    <div class="left bordered child">This floats left.</div>
-    <div class="left bordered child">This floats left.</div>
-    <div class="left bordered child">This floats left.</div>
-    <div class="left bordered child">This floats left.</div>
-    <div class="left bordered child">This floats left.</div>
-    <div class="left bordered child">This floats left.</div>
-    <div class="left bordered child">This floats left.</div>
-  </div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/float-block-formatting.html b/fend-refresh/lesson6-part2/float-block-formatting.html
deleted file mode 100644
index 00e2f7229..000000000
--- a/fend-refresh/lesson6-part2/float-block-formatting.html
+++ /dev/null
@@ -1,35 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Block Formatting Context</title>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-      font-size: 14pt;
-    }
-    .child {
-      background-color: #15A222;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    .block-context {
-      overflow: auto;
-      background-color: #D16906;
-    }
-    .left {
-      float: left;
-    }
-  </style>
-</head>
-<body>
-  <div class="parent">
-    <div class="child left">Child</div>
-    <div class="child left">Child</div>
-    <div class="bordered block-context">New context</div>
-  </div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/float-clear-tests.json b/fend-refresh/lesson6-part2/float-clear-tests.json
deleted file mode 100644
index b4528259e..000000000
--- a/fend-refresh/lesson6-part2/float-clear-tests.json
+++ /dev/null
@@ -1,17 +0,0 @@
-[{
-  "name": "Float Clearing",
-  "code": "clearlycoolchapsclearcode",
-  "tests": [
-    {
-      "description": ".sibling is below the child floats",
-      "definition": {
-        "nodes": ".sibling",
-        "cssProperty": "clear",
-        "equals": [
-          "left",
-          "both"
-        ]
-      }
-    }
-  ]
-}]
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/float-clears.html b/fend-refresh/lesson6-part2/float-clears.html
deleted file mode 100644
index a71b11d2b..000000000
--- a/fend-refresh/lesson6-part2/float-clears.html
+++ /dev/null
@@ -1,62 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Block Formatting Context</title>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-      font-size: 14pt;
-    }
-    div:nth-child(even):not(.left):not(.right) {
-      background-color: #128FC2;
-    }
-    div:nth-child(odd):not(.left):not(.right) {
-      background-color: #15A222;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    .left {
-      float: left;
-      background-color: #FD9F0E;
-    }
-    .right {
-      float: right;
-      background-color: #FD9F0E;
-    }
-    .clear-left {
-      clear: left;
-    }
-    .clear-right {
-      clear: right;
-    }
-    .clear-both {
-      clear: both;
-    }
-    .wide {
-      width: 40%;
-    }
-  </style>
-</head>
-<body>
-  <!-- example 1 -->
-  <div class="bordered left">Left ← Left ← Left</div>
-  <div class="bordered clear-left">This element has been clear left'ed.</div>
-
-  <!-- example 2 -->
-  <div class="bordered right">Right → Right → Right</div>
-  <div class="bordered clear-right">This element has been clear right'ed.</div>
-
-  <!-- example 3 -->
-  <div class="left bordered">Left ← Left ← Left</div>
-  <div class="bordered">Not cleared at all!</div>
-
-  <!-- example 4 -->
-  <div class="bordered left wide">Left ← Left ← Left ← Really wide.</div>
-  <div class="bordered right wide">Right → Right → Right. Really wide.</div>
-  <div class="bordered clear-both">This element has been clear both'ed.</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/float-left-example.html b/fend-refresh/lesson6-part2/float-left-example.html
deleted file mode 100644
index 8f3854f7f..000000000
--- a/fend-refresh/lesson6-part2/float-left-example.html
+++ /dev/null
@@ -1,43 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Float Example</title>
-  <style>
-    body {
-      width: 640px;
-      margin: 0 auto;
-    }
-    img {
-      height: 200px;
-    }
-    .left {
-      float: left;
-      margin-right: 8px;
-    }
-    .right {
-      float: right;
-      margin-left: 8px;
-    }
-  </style>
-</head>
-<body>
-  <h1>Carl Sagan</h1>
-
-  <p>Birth radio telescope, brain is the seed of intelligence the carbon in our apple pies courage of our questions dispassionate extraterrestrial observer the ash of stellar alchemy courage of our questions, billions upon billions from which we spring tesseract, as a patch of light take root and flourish hydrogen atoms, the sky calls to us laws of physics Vangelis? Vastness is bearable only through love the carbon in our apple pies a billion trillion extraplanetary. Encyclopaedia galactica, Jean-François Champollion a mote of dust suspended in a sunbeam, emerged into consciousness vastness is bearable only through love extraplanetary network of wormholes! Culture, light years.</p>
-
-  <img class="left" src="images/Carl_Sagan_Planetary_Society.jpg" alt="Carl Sagan by NASA/JPL [Public domain], via Wikimedia Commons">
-
-  <p>Circumnavigated, the carbon in our apple pies citizens of distant epochs great turbulent clouds globular star cluster descended from astronomers shores of the cosmic ocean billions upon billions! Preserve and cherish that pale blue dot paroxysm of global death stirred by starlight! Ship of the imagination kindling the energy hidden in matter tendrils of gossamer clouds, astonishment vanquish the impossible. Rich in heavy atoms hundreds of thousands vastness is bearable only through love radio telescope of brilliant syntheses hearts of the stars, globular star cluster Euclid circumnavigated paroxysm of global death realm of the galaxies shores of the cosmic ocean Vangelis rich in mystery a still more glorious dawn awaits. Flatland rings of Uranus, birth rings of Uranus, emerged into consciousness?</p>
-
-  <img class="right" src="images/256px-PaleBlueDot.jpg" alt="Pale Blue Dot - Earth as seen through one of Saturn's rings">
-
-  <p>Not a sunrise but a galaxyrise galaxies vanquish the impossible. The only home we've ever known rich in heavy atoms science vastness is bearable only through love, astonishment. Prime number, paroxysm of global death. Ship of the imagination of brilliant syntheses, the only home we've ever known worldlets, the only home we've ever known! Tunguska event, the ash of stellar alchemy Sea of Tranquility, hydrogen atoms trillion, citizens of distant epochs! Quasar. Descended from astronomers. Rogue. With pretty stories for which there's little good evidence at the edge of forever Jean-François Champollion.</p>
-
-  <p>Orion's sword hearts of the stars at the edge of forever paroxysm of global death corpus callosum light years rich in heavy atoms galaxies! Rings of Uranus. Paroxysm of global death rich in mystery, corpus callosum Apollonius of Perga the ash of stellar alchemy culture, white dwarf rings of Uranus rich in heavy atoms, shores of the cosmic ocean rings of Uranus how far away preserve and cherish that pale blue dot rich in heavy atoms, not a sunrise but a galaxyrise light years emerged into consciousness Apollonius of Perga and billions upon billions upon billions upon billions upon billions upon billions upon billions.</p>
-
-  <p><em>Carl Sagan image credit: <a href="https://commons.wikimedia.org/wiki/File:Carl_Sagan_Planetary_Society.JPG">NASA/JPL [Public domain], via Wikimedia Commons</a></em></p>
-  <p><em>Pale Blue Dot image credit: <a href="https://commons.wikimedia.org/wiki/File%3APaleBlueDot.jpg">NASA/JPL [Public domain], via Wikimedia Commons</a></em></p>
-  <p><em>Lorem Ipsum text: <a href="http://saganipsum.com/">Sagan Ipsum</a></em></p>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/float-parent-sibling.html b/fend-refresh/lesson6-part2/float-parent-sibling.html
deleted file mode 100644
index 5b108c87a..000000000
--- a/fend-refresh/lesson6-part2/float-parent-sibling.html
+++ /dev/null
@@ -1,35 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Parent with Siblings and Float Children</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-      font-size: 14pt;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    .child {
-      background-color: #15A222;
-    }
-    .sibling {
-      background-color: #D16906;
-    }
-    .left {
-      float: left;
-    }
-  </style>
-</head>
-<body>
-  <div class="bordered parent">
-    <div class="bordered child left">Child</div>
-    <div class="bordered child left">Child</div>
-  </div>
-  <div class="bordered sibling">Sibling to the parent</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/float-with-parent.html b/fend-refresh/lesson6-part2/float-with-parent.html
deleted file mode 100644
index 71d44b2c4..000000000
--- a/fend-refresh/lesson6-part2/float-with-parent.html
+++ /dev/null
@@ -1,30 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Float with Parent</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-      font-size: 14pt;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    .parent {
-      width: 50%;
-    }
-    .child {
-      width: 10em;
-    }
-  </style>
-</head>
-<body>
-  <div class="parent bordered">
-    <div class="child bordered">child</div>
-  </div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/floats-left-right.html b/fend-refresh/lesson6-part2/floats-left-right.html
deleted file mode 100644
index fd2bf725b..000000000
--- a/fend-refresh/lesson6-part2/floats-left-right.html
+++ /dev/null
@@ -1,44 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Floats Left and Right</title>
-  <style>
-    @font-face {
-      font-family: 'Menlo Regular';
-      font-style: normal;
-      font-weight: normal;
-      src: local('Menlo Regular'), url('fonts/Menlo-Regular.woff');
-    }
-    * {
-      box-sizing: border-box;
-      font-family: 'Menlo Regular', monospace;
-      font-weight: bold;
-    }
-    div {
-      font-size: 44pt;
-      border: 6px solid #2e3d49;
-      width: 5em;
-      text-align: center;
-    }
-    .left {
-      float: left;
-    }
-    .right {
-      float: right;
-    }
-    .green {
-      background-color: #89D698;
-    }
-    .blue {
-      background-color: #89D0E5;
-    }
-  </style>
-</head>
-<body>
-  <div class="left 1 green">.left.1</div>
-  <div class="right 2 blue">.right.2</div>
-  <div class="left 3 green">.left.3</div>
-  <div class="right 4 blue">.right.4</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/floats-wrapping.html b/fend-refresh/lesson6-part2/floats-wrapping.html
deleted file mode 100644
index c44f603b2..000000000
--- a/fend-refresh/lesson6-part2/floats-wrapping.html
+++ /dev/null
@@ -1,53 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Floats Left and Right</title>
-  <style>
-    @font-face {
-      font-family: 'Menlo Regular';
-      font-style: normal;
-      font-weight: normal;
-      src: local('Menlo Regular'), url('fonts/Menlo-Regular.woff');
-    }
-    * {
-      box-sizing: border-box;
-      font-family: 'Menlo Regular', monospace;
-      font-weight: bold;
-    }
-    div {
-      font-size: 44pt;
-      border: 6px solid #2e3d49;
-      width: 5em;
-      text-align: center;
-    }
-    .left {
-      float: left;
-    }
-    .green {
-      background-color: #89D698;
-    }
-    .blue {
-      background-color: #89D0E5;
-    }
-  </style>
-</head>
-<body>
-  <div class="left green">.left</div>
-  <div class="left blue">.left</div>
-  <div class="left green">.left</div>
-  <div class="left blue">.left</div>
-  <div class="left green">.left</div>
-  <div class="left blue">.left</div>
-  <div class="left green">.left</div>
-  <div class="left blue">.left</div>
-  <div class="left green">.left</div>
-  <div class="left blue">.left</div>
-  <div class="left green">.left</div>
-  <div class="left blue">.left</div>
-  <div class="left green">.left</div>
-  <div class="left blue">.left</div>
-  <div class="left green">.left</div>
-  <div class="left blue">.left</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/floats.key b/fend-refresh/lesson6-part2/floats.key
deleted file mode 100644
index ab3776124..000000000
Binary files a/fend-refresh/lesson6-part2/floats.key and /dev/null differ
diff --git a/fend-refresh/lesson6-part2/fonts/Menlo-Regular.woff b/fend-refresh/lesson6-part2/fonts/Menlo-Regular.woff
deleted file mode 100755
index d4cf0829f..000000000
Binary files a/fend-refresh/lesson6-part2/fonts/Menlo-Regular.woff and /dev/null differ
diff --git a/fend-refresh/lesson6-part2/images/256px-PaleBlueDot.jpg b/fend-refresh/lesson6-part2/images/256px-PaleBlueDot.jpg
deleted file mode 100644
index 9d3e2b6d3..000000000
Binary files a/fend-refresh/lesson6-part2/images/256px-PaleBlueDot.jpg and /dev/null differ
diff --git a/fend-refresh/lesson6-part2/images/Carl_Sagan_Planetary_Society.JPG b/fend-refresh/lesson6-part2/images/Carl_Sagan_Planetary_Society.JPG
deleted file mode 100644
index 436710831..000000000
Binary files a/fend-refresh/lesson6-part2/images/Carl_Sagan_Planetary_Society.JPG and /dev/null differ
diff --git a/fend-refresh/lesson6-part2/images/Carl_Sagan_Planetary_Society.jpg b/fend-refresh/lesson6-part2/images/Carl_Sagan_Planetary_Society.jpg
deleted file mode 100644
index 436710831..000000000
Binary files a/fend-refresh/lesson6-part2/images/Carl_Sagan_Planetary_Society.jpg and /dev/null differ
diff --git a/fend-refresh/lesson6-part2/pseudoelements.html b/fend-refresh/lesson6-part2/pseudoelements.html
deleted file mode 100644
index d5d19c8a3..000000000
--- a/fend-refresh/lesson6-part2/pseudoelements.html
+++ /dev/null
@@ -1,31 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Pseudoelements Example</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-      font-size: 14pt;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    .child {
-      background-color: #15A222;
-    }
-    .child:after {
-      content: 'Pseudo-element!';
-      display: block;
-    }
-  </style>
-</head>
-<body>
-  <div class="parent">Parent
-    <div class="child bordered">Child</div>
-  </div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6-part2/quiz-float-clearing.html b/fend-refresh/lesson6-part2/quiz-float-clearing.html
deleted file mode 100644
index 75437fa1b..000000000
--- a/fend-refresh/lesson6-part2/quiz-float-clearing.html
+++ /dev/null
@@ -1,36 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Parent with Siblings and Float Children</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <meta name="udacity-grader" content="float-clear-tests.json">
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-      font-size: 14pt;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    .child {
-      background-color: #15A222;
-    }
-    .sibling {
-      background-color: #D16906;
-    }
-    .left {
-      float: left;
-    }
-  </style>
-</head>
-<body>
-  <div class="bordered parent">
-    <div class="bordered child left">Child</div>
-    <div class="bordered child left">Child</div>
-  </div>
-  <div class="bordered sibling">Sibling to the parent</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/absolute-fixed-flow/absolute-example.html b/fend-refresh/lesson6/absolute-fixed-flow/absolute-example.html
deleted file mode 100644
index 0c9a41a87..000000000
--- a/fend-refresh/lesson6/absolute-fixed-flow/absolute-example.html
+++ /dev/null
@@ -1,40 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Absolute Example</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-    }
-    div {
-      display: inline-block;
-      border: 2px solid #2e3d49;
-      width: 200px;
-      height: 100px;
-    }
-    div:nth-child(even) {
-      background-color: #ecc81a;
-    }
-    div:nth-child(odd) {
-      background-color: #02b3e4;
-    }
-    .absolute {
-      position: absolute;
-      top: 50px;
-      left: 50px;
-    }
-  </style>
-</head>
-<body>
-  <div></div>
-  <div></div>
-  <div class="absolute">Absolute
-    <div class="absolute">Absolute child of absolute</div>
-  </div>
-  <div></div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/absolute-fixed-flow/coco.md b/fend-refresh/lesson6/absolute-fixed-flow/coco.md
deleted file mode 100644
index 1a0d444d3..000000000
--- a/fend-refresh/lesson6/absolute-fixed-flow/coco.md
+++ /dev/null
@@ -1,89 +0,0 @@
-Think back to relative positioning. When you're relatively positioning elements, you can use the `top`, `left`, `bottom`, and `right` properties to shift the position of an element relative to where it should have ended up in the normal flow.
-
-`position: absolute` and `position: fixed` work similarly. Before we start, here's a quick table summarizing the differences:
-
-|                           | **Relative**                | **Absolute**           | **Fixed**              |
-|---------------------------|-------------------------|--------------------|--------------------|
-| **When**                      | After normal flow       | Before normal flow | Before normal flow |
-| **Positioned relative to...** | position in normal flow | parent             | viewport           |
-
-### Absolute Position
-
-In the case of `position: absolute`, the biggest difference is timing.
-
-Remember, relative elements are laid out in the normal flow first. After all of the elements have been laid out, then  the shift from its normal position occurs.
-
-In the case of `position: absolute`, the element is positioned relative to its parent *before* the rest of the normal flow occurs. Its siblings in the normal flow *ignore it* and are laid out as if it were not there.
-
-Take a second to examine the next example. [Play with the live version!](http://udacity.github.io/fend/fend-refresh/lesson6/absolute-fixed-flow/absolute-example.html) Notice that the blue and yellow colors should be alternating.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Absolute Example</title>
-      <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-      <style>
-        * {
-          box-sizing: border-box;
-          font-family: 'Source Sans Pro', sans-serif;
-          font-weight: bold;
-        }
-        div {
-          display: inline-block;
-          border: 2px solid #2e3d49;
-          width: 200px;
-          height: 100px;
-        }
-        div:nth-child(even) {
-          background-color: #ecc81a;
-        }
-        div:nth-child(odd) {
-          background-color: #02b3e4;
-        }
-        .absolute {
-          position: absolute;
-          top: 50px;
-          left: 50px;
-        }
-      </style>
-    </head>
-    <body>
-      <div></div>
-      <div></div>
-      <div class="absolute">Absolute
-        <div class="absolute">Absolute child of absolute</div>
-      </div>
-      <div></div>
-    </body>
-    </html>
-
-[insert image]
-
-Both `position: absolute` elements are relative to their parents. Use developer tools on [the live site](http://udacity.github.io/fend/fend-refresh/lesson6/absolute-fixed-flow/absolute-example.html) to check and uncheck `top` and `left`. You'll notice that without specified coordinates, the element appears where it would have been in the normal flow, however its siblings still ignore it. The absolute element appears on top.
-
-### Fixed Position
-
-`position: fixed` elements are in the simplest flow. For them, `top`, `bottom`, `left` and `right` indicate a position within the viewport. As the user scrolls the page, fixed elements never move. The most common use cases include headers and side navigation menus.
-
-[nytimes image]
-
-*The New York Times homepage on 17 Aug 2016*
-
-For instance, [The New York Times homepage](https://nytimes.com) uses a fixed header to keep the navigation bar in place as you scroll down the page. You can easily see this behavior with developer tools.
-
-<video width="100%" controls loop >
-  <source src="https://s3.amazonaws.com/content.udacity-data.com/courses/fend/nytimes-fixed.mp4" type="video/mp4">
-  Your browser does not support the video tag. <a href="https://s3.amazonaws.com/content.udacity-data.com/courses/fend/nytimes-fixed.mp4" target="_blank">Click here to see the animation.</a>
-</video>
-<br>
-<br>
-
-
-If you look closely at the video (or examine the site yourself!), you'll see that the `<header>` also has `top: 0; left: 0` set, meaning that the header should be laid out at the top left corner of the page.
-
-### When Would You Actually Use `position: absolute`?
-
-Frankly, `position: absolute` is best thought of as a last resort. If all the other flows fail, then *maybe* absolute is your best option. Off the top of my head, I can't actually think of an instance where I *wanted* to use `position: absolute`. There are, in fact, other CSS techniques for absolutely positioning elements, of which my favorite is [`transform: translate`](https://developer.mozilla.org/en-US/docs/Web/CSS/transform).
-
-It's good to know what `position: absolute` does, but it's rarely your best positioning option.
\ No newline at end of file
diff --git a/fend-refresh/lesson6/absolute-fixed-flow/fixed-quiz.html b/fend-refresh/lesson6/absolute-fixed-flow/fixed-quiz.html
deleted file mode 100644
index c06aaa5df..000000000
--- a/fend-refresh/lesson6/absolute-fixed-flow/fixed-quiz.html
+++ /dev/null
@@ -1,52 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Fixed Footer Quiz</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <meta name="udacity-grader" content="fixed-tests.json">
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-    }
-    body {
-      margin: 0;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    div {
-      width: 200px;
-      height: 100px;
-    }
-    .sticky-footer {
-      background-color: #15C26B;
-      width: 100%;
-      height: 50px;
-    }
-    div:nth-child(even) {
-      background-color: #ecc81a;
-    }
-    div:nth-child(odd) {
-      background-color: #02b3e4;
-    }
-  </style>
-</head>
-<body>
-  <div class="bordered">Random</div>
-  <footer class="sticky-footer">Footer! Company info, etc. Normally, this would be at the end of the HTML. I'm putting it here so it's visible at first render.</footer>
-  <div class="bordered">divs</div>
-  <div class="bordered">to</div>
-  <div class="bordered">make</div>
-  <div class="bordered">the</div>
-  <div class="bordered">document</div>
-  <div class="bordered">tall</div>
-  <div class="bordered">enough</div>
-  <div class="bordered">to</div>
-  <div class="bordered">be</div>
-  <div class="bordered">scrollable.</div>
-  <div class="bordered">You can do it!</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/absolute-fixed-flow/fixed-tests.json b/fend-refresh/lesson6/absolute-fixed-flow/fixed-tests.json
deleted file mode 100644
index b10b872a0..000000000
--- a/fend-refresh/lesson6/absolute-fixed-flow/fixed-tests.json
+++ /dev/null
@@ -1,22 +0,0 @@
-[{
-  "name": "Fixed Position",
-  "code": "glueisalsosticky",
-  "tests": [
-    {
-      "description": "Footer has fixed position",
-      "definition": {
-        "nodes": ".sticky-footer",
-        "cssProperty": "position",
-        "equals": "fixed"
-      }
-    },
-    {
-      "description": "One property is used to make the footer sticky",
-      "definition": {
-        "nodes": ".sticky-footer",
-        "cssProperty": "bottom",
-        "equals": "0px"
-      }
-    }
-  ]
-}]
\ No newline at end of file
diff --git a/fend-refresh/lesson6/inline-block/inline-block-example-final.html b/fend-refresh/lesson6/inline-block/inline-block-example-final.html
deleted file mode 100644
index 932e07513..000000000
--- a/fend-refresh/lesson6/inline-block/inline-block-example-final.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Inline-Block Example</title>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-    }
-    .inline-block {
-      display: inline-block;
-    }
-    .random {
-      border: 2px solid #2e3d49;
-      background-color: #ecc81a;
-      /*width: 20em;*/
-      height: 40px;
-    }
-  </style>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-</head>
-<body>
-  <div class="container"><span>Milk aromatic sugar ut extra cappuccino brewed trifecta cream. Cup viennese, seasonal, affogato cultivar café au lait frappuccino single shot mocha turkish pumpkin spice. </span><div class="random inline-block">This is a random div.</div> <div class="random inline-block">This is a second random div.</div><span> Crema roast, java pumpkin spice mazagran americano variety. White so, extraction, strong breve flavour dark flavour medium redeye. Steamed aftertaste variety frappuccino galão at macchiato.</span></div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/inline-block/inline-block-example-inline.html b/fend-refresh/lesson6/inline-block/inline-block-example-inline.html
deleted file mode 100644
index 86da55e68..000000000
--- a/fend-refresh/lesson6/inline-block/inline-block-example-inline.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Inline-Block Example</title>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-    }
-    .inline-block {
-      display: inline-block;
-    }
-    .random {
-      border: 2px solid #2e3d49;
-      background-color: #ecc81a;
-      width: 20em;
-      height: 40px;
-    }
-  </style>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-</head>
-<body>
-  <div class="container"><span>Milk aromatic sugar ut extra cappuccino brewed trifecta cream. Cup viennese, seasonal, affogato cultivar café au lait frappuccino single shot mocha turkish pumpkin spice. </span><span class="random inline-block">This is a random span.</span><span> Crema roast, java pumpkin spice mazagran americano variety. White so, extraction, strong breve flavour dark flavour medium redeye. Steamed aftertaste variety frappuccino galão at macchiato.</span></div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/inline-block/inline-block-example-start.html b/fend-refresh/lesson6/inline-block/inline-block-example-start.html
deleted file mode 100644
index ef2361c14..000000000
--- a/fend-refresh/lesson6/inline-block/inline-block-example-start.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Inline-Block Example</title>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-    }
-    .inline-block {
-      display: inline-block;
-    }
-    .random {
-      border: 2px solid #2e3d49;
-      background-color: #ecc81a;
-      width: 20em;
-      height: 40px;
-    }
-  </style>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-</head>
-<body>
-  <div class="container"><span>Milk aromatic sugar ut extra cappuccino brewed trifecta cream. Cup viennese, seasonal, affogato cultivar café au lait frappuccino single shot mocha turkish pumpkin spice. </span><span class="random">This is a random span.</span><span> Crema roast, java pumpkin spice mazagran americano variety. White so, extraction, strong breve flavour dark flavour medium redeye. Steamed aftertaste variety frappuccino galão at macchiato.</span></div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/normal-flow/anonymous-boxes.html b/fend-refresh/lesson6/normal-flow/anonymous-boxes.html
deleted file mode 100644
index c8346d72c..000000000
--- a/fend-refresh/lesson6/normal-flow/anonymous-boxes.html
+++ /dev/null
@@ -1,40 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Anonymous Boxes</title>
-  <style>
-    * {
-      box-sizing: border-box;
-    }
-    div:nth-child(even) {
-      background-color: #fcf;
-    }
-    div:nth-child(odd) {
-      background-color: #cfc;
-    }
-    .test {
-      height: 400px;
-    }
-    .inline {
-      display: inline-block;
-    }
-    div.inline {
-      
-    }
-  </style>
-</head>
-<body>
-  <div>
-    <p>This is text<span> and so is this</span></p>
-  </div>
-  <div>
-  sup 
-    <span class="test inline">hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi hi </span>
-    <span>yo </span>
-    <span>that</span>
-  </div>
-  <div class="inline">text</div>
-  <div class="inline">text</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/normal-flow/keynote-sample.html b/fend-refresh/lesson6/normal-flow/keynote-sample.html
deleted file mode 100644
index e85c48037..000000000
--- a/fend-refresh/lesson6/normal-flow/keynote-sample.html
+++ /dev/null
@@ -1,55 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Sample Normal Flow</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-    }
-    body {
-      /*padding-left: calc(25% - 8px);*/
-    }
-    div:nth-child(even) {
-      background-color: #ecc81a;
-    }
-    div:nth-child(odd) {
-      background-color: #02b3e4;
-    }
-    span:nth-child(even) {
-      background-color: #f95c3c;
-    }
-    span:nth-child(odd) {
-      background-color: #02ccba;
-    }
-    div {
-      height: 50px;
-      margin-bottom: 8px;
-    }
-    .first {
-      width: 100px;
-    }
-    .second {
-      width: 150px;
-    }
-    .third {
-      width: 50px;
-    }
-    span, div {
-      border: 4px solid #2e3d49;
-    }
-  </style>
-</head>
-<body>
-  <div class="first">block</div>
-  <div class="second">block</div>
-  <div class="third">block</div>
-  <span>span </span>
-  <span>span </span>
-  <span>span</span>
-  <div class="fourth">block</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/quiz-normal-flow/question.html b/fend-refresh/lesson6/quiz-normal-flow/question.html
deleted file mode 100644
index 7012fcbfd..000000000
--- a/fend-refresh/lesson6/quiz-normal-flow/question.html
+++ /dev/null
@@ -1,31 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Normal Flow Quiz</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-    }
-    span, div {
-      border: 2px solid #2e3d49;
-    }
-    .blue {
-      background-color: #02b3e4;
-    }
-  </style>
-</head>
-<body>
-  <div class="blue">
-    <span>HTML, </span>
-    <div>CSS </div>
-    <span>and </span>
-    <span>JavaScript </span>
-    <div>are the programming languages</div>
-    <div> of the web.</div>
-  </div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/quiz-relative-flow/index.html b/fend-refresh/lesson6/quiz-relative-flow/index.html
deleted file mode 100644
index 19626367a..000000000
--- a/fend-refresh/lesson6/quiz-relative-flow/index.html
+++ /dev/null
@@ -1,54 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Relative Flow Quiz</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <meta name="udacity-grader" content="tests.json">
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-      font-size: 14pt;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    .parent {
-      height: 100%;
-      background-color: #dbe2e8;
-      padding: 8px;
-    }
-    .light-olive {
-      background-color: #DFDFD1;
-    }
-    .relative {
-      position: relative;
-      top: 50px;
-    }
-    .sibling {
-      display: inline-block;
-      background-color: #15C26B;
-      width: 150px;
-      height: 100px;
-    }
-    .child {
-      background-color: #ffae0c;
-    }
-  </style>
-</head>
-<body>
-  <div class="parent">Parent<br>
-    <div class="sibling bordered">Sibling</div>
-    <div class="sibling relative bordered">Relative Sibling
-      <div class="child bordered">Child</div>
-      <div class="child bordered">Child</div>
-    </div>
-    <div class="sibling bordered">Sibling</div>
-  </div>
-  <span class="light-olive">
-    Sibling to the parent
-  </span>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/quiz-relative-flow/tests.json b/fend-refresh/lesson6/quiz-relative-flow/tests.json
deleted file mode 100644
index 90401d4a4..000000000
--- a/fend-refresh/lesson6/quiz-relative-flow/tests.json
+++ /dev/null
@@ -1,12 +0,0 @@
-[{
-  "name": "Debugging CSS",
-  "code": "movin-on-up",
-  "tests": [{
-    "description": "The non-relative siblings have moved up",
-    "definition": {
-      "nodes": ".sibling:not(.relative)",
-      "cssProperty": "verticalAlign",
-      "equals": ["top", "text-top"]
-    }
-  }]
-}]
\ No newline at end of file
diff --git a/fend-refresh/lesson6/quiz-why-two-lines/baseline.md b/fend-refresh/lesson6/quiz-why-two-lines/baseline.md
deleted file mode 100644
index c99b2e956..000000000
--- a/fend-refresh/lesson6/quiz-why-two-lines/baseline.md
+++ /dev/null
@@ -1,62 +0,0 @@
-In the next two quizzes, you'll be diving headfirst into debugging a very strange situation with CSS. But before you get there, you need a little more background on text layout.
-
-Rendered text on a website, like the text you're reading now, takes up space on the page. The font and font size you use is a major factor in calculating the size of the line boxes of inline elements. Each font defines a text-top, text-bottom and <a href="https://en.wikipedia.org/wiki/Baseline_(typography)" target="_blank">baseline</a>, which the browser uses to calculate the height of the line boxes.
-
-<<diagram of font height lines>>
-Fonts are more complicated than this, of course, but this is generally the picture you should keep in your head for web development.
-
-There are two properties that you can use to align text: `text-align` for [horizontal alignment](https://developer.mozilla.org/en-US/docs/Web/CSS/text-align) and `vertical-align` for [vertical alignment](https://developer.mozilla.org/en-US/docs/Web/CSS/vertical-align).
-
-### Horizontal Alignment
-
-Horizontal alignment starts with another property, `direction`, which has two options: `ltr` and `rtl`. `ltr` is the default value and it stands for "left to right". `rtl` stands for "right to left". You'll need to set `direction: rtl` when working with text in languages like Hebrew (עִברִית) and Arabic (العربية), which are read from right to left (compare the two directions on [our landing page for our Egypt program](https://www.udacity.com/egypt)!).
-
-`text-align` takes on the default value of `start`. In the case of `ltr`, `start` is the same as `left`. With `rtl`, `start` is equivalent to `right`. This is normal text alignment, where the text pushes against the start of the container. `justify` is another option. Newspapers (in real life) tend to use `justify` to keep the left and right edges of text nicely aligned with the edges of the column, but it's not used as much online. Besides that, `left`, `right`, and `center` do exactly what you think they do - align text to the left, right or center of the line box.
-
-### Vertical Alignment
-
-By default, text sits on the baseline inside its container. More specifically, the baseline of the text will match the baseline of the parent. Let me show you an example.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Baselines</title>
-      <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-      <style>
-        * {
-          box-sizing: border-box;
-          font-family: 'Source Sans Pro', sans-serif;
-          font-weight: bold;
-          font-size: 14pt;
-        }
-        .bordered {
-          border: 2px solid #2e3d49;
-        }
-        span {
-          display: inline-block; /* so I can set a width */
-          width: 10em; /* with a limited width, the text is forced to wrap */
-        }
-      </style>
-    </head>
-    <body>
-      <div class="parent bordered">
-        <span>This is text.</span>
-        <span>This is more text.</span>
-        <span>This is text that extends a few lines down so that you can see that its baseline is lower.</span>
-      </div>
-    </body>
-    </html>
-
-<<img baselines>>
-Notice that all the text is aligned at the bottom of the parent.
-
-In this case, the larger span pushes the baseline of the parent lower because the parent must expand to contain the span. The two shorter spans drop down to sit on the parent's baseline.
-
-There are two sets of values you can use to change text vertical alignment. The first set focuses on the parent's size, while the second set focuses on the element's *line*.
-
-`vertical-align: text-top`, `vertical-align: text-bottom` and `vertical-align: middle` are options for aligning text to the [eponymous](https://en.wikipedia.org/wiki/Eponym) locations in the parent.
-
-`vertical-align: top` and `vertical-align: bottom` will align with the *line* instead.
-
-Deciding how and when to use `vertical-align` is usually more of an exercise in trial-and-error than careful consideration. So in the next quiz, you'll be trying them out!
\ No newline at end of file
diff --git a/fend-refresh/lesson6/quiz-why-two-lines/baselines.html b/fend-refresh/lesson6/quiz-why-two-lines/baselines.html
deleted file mode 100644
index b56257d18..000000000
--- a/fend-refresh/lesson6/quiz-why-two-lines/baselines.html
+++ /dev/null
@@ -1,31 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Baselines</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-      font-size: 14pt;
-    }
-    .bordered {
-      border: 2px solid #2e3d49;
-    }
-    span {
-      display: inline-block; /* so I can set a width */
-      width: 10em;
-      vertical-align: top;
-    }
-  </style>
-</head>
-<body>
-  <div class="parent bordered">
-    <span>This is text.</span>
-    <span>This is more text.</span>
-    <span>This is text that extends a few lines down so that you can see that its baseline is lower.</span>
-  </div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/quiz-why-two-lines/coco.md b/fend-refresh/lesson6/quiz-why-two-lines/coco.md
deleted file mode 100644
index 77a4607da..000000000
--- a/fend-refresh/lesson6/quiz-why-two-lines/coco.md
+++ /dev/null
@@ -1,188 +0,0 @@
-Engineering projects are big, complicated endeavors. Subsystems work together to create larger systems. Components and connections create subsystems. Understanding the system as a whole involves recognizing how the many layers fit together. This may sound daunting but there's good news:
-
-> ### Simple ideas form the basis of even the most complex system.
-
-The layouts of real websites are no different - simple CSS properties combine to form complex layous.
-
-Being able to reason about, isolate and work with individual aspects of any large system is critical for your career as a developer. For this quiz, I want you to practice breaking down a complex problem by fixing [this website](http://udacity.github.io/fend/fend-refresh/lesson6/quiz-relative-flow/). The HTML is below. Take a moment to read through the HTML and then predict the general layout of this site.
-
-    <!DOCTYPE html>
-    <html lang="en">
-    <head>
-      <meta charset="UTF-8">
-      <title>Relative Flow Quiz</title>
-      <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-      <style>
-        * {
-          box-sizing: border-box;
-          font-family: 'Source Sans Pro', sans-serif;
-          font-weight: bold;
-          font-size: 14pt;
-        }
-        .bordered {
-          border: 2px solid #2e3d49;
-        }
-        .block-container {
-          background-color: #dbe2e8;
-          padding: 8px;
-        }
-        .inline-container {
-          background-color: #DFDFD1;
-        }
-        .relative {
-          position: relative;
-          top: 50px;
-        }
-        .sibling {
-          display: inline-block;
-          background-color: #15C26B;
-          width: 150px;
-          height: 100px;
-        }
-        .child {
-          background-color: #ffae0c;
-        }
-      </style>
-    </head>
-    <body>
-      <div class="block-container">Parent<br>
-        <div class="sibling bordered">Sibling</div>
-        <div class="sibling relative bordered">Relative Sibling
-          <div class="child bordered">Child</div>
-          <div class="child bordered">Child</div>
-        </div>
-        <div class="sibling bordered">Sibling</div>
-      </div>
-      <span class="inline-container">
-        Sibling to the parent
-      </span>
-    </body>
-    </html>
-
-It'd be reasonable to assume that the `.relative` div will end up 50 pixels lower than the two other `.sibling`s. However, that's not the case.
-
-<<img start>>
-What it looks like now.
-
-Let me point out another oddity of the site the way it is now.
-
-<<img pointing to the slight diff in heights between relative and other sibs>>
-
-Why is there a slight difference here? [annotate?]
-
-<<img end>>
-This is how you probably thought the site should look.
-
-This will be a two-part quiz. In both parts, you'll need to do some research and develop hypotheses.
-
-### Part 1
-
-The image below shows how I want you to make this site look. You'll use developer tools to fix it. To do so, you only need to add **one** line of CSS on the `.sibling` class. My advice is to think back to what you just learned about `text-align` and `vertical-align`.
-
-I want you to download the site and work with it on your own machine. When you've fixed the site, you'll get a code that you can copy and paste into the box at the bottom of this page.
-
-### Part 2
-
-Making the site look right is only half of this challenge. The other half is uncovering the *cause* of the surprising layout. I want you to investigate the difference between the heights of the siblings. More on this after you finish part 1 by filling in the code below.
-
-### Instructions
-
-1. Download the site from the resources section.
-2. Edit the site to make it look like the image above - *you only need to add one CSS property to* `.sibling`!
-3. Copy the code from the Udacity Feedback extension into the box below.
-
-
-
-
-In part 1, you used `vertical-align: top` to align the siblings with the top of the parent and fix the layout. While this fixes the problem, it doesn't explain *why* there is the small gap between the relative div and its siblings. So why is it there?
-
-<<img pointing out height diff>>
-Why???
-
-This is a *crazy* problem and the answer isn't simple. I want you to do your best but don't get disheartened if you're stumped. It's okay if you just want to skip ahead to my walkthrough. I ran into this situation on accident when I was preparing part 1 of this quiz and it took me some time to uncover everything that's happening. Think of this as a bonus challenge.
-
-Frankly, this is a *very* strange situation. But CSS has a lot of these, so you should get some experience debugging one now. Here's how I want you to tackle this problem.
-
-### Hints
-
-* Consider *the order* in which layout happens. When is the relative shift applied?
-* Think back to baselines and inline elements. How do the baselines of the siblings align against the parent?
-
-### Instructions
-
-1. Prepare and do some background reading! No one remembers everything about CSS. We all refer to documentation, guides and references *constantly*.
-  * Read this quick chapter on [Box Positioning in CSS from *Learn CSS Layout*](http://book.mixu.net/css/1-positioning.html), an amazing online book about the details of CSS by [Mikito Takada](http://mixu.net/). I specifically recommend the section on [inline formatting](http://book.mixu.net/css/1-positioning.html#normal-flow-inline-formatting).
-2. Open the site on your own computer. (It's the same site as the last quiz).
-3. Try things out! Test your ideas quickly with developer tools.
-  * Make a hypothesis about an idea.
-  * Test your idea.
-  * Asses whether or not it worked.
-  * If it didn't work, integrate what you learned into a new hypothesis and test a new idea!
-4. When you think you know the answer, write it down! Compare what you think to my walkthrough on the next page.
-
-
-
-
-// solution
-
-As I said earlier, I came across this problem on accident. I'm presenting the solution in an order that's efficient and effective for your understanding, but I want you to know that this is the end product of a lot of experimentation. I spent quite a bit of time in developer tools playing with CSS properties, predicting what would happen before I made a change and then drawing conclusions after. I'm not alone in my approach. Here's a quote from Warren Ouyang, our lead front-end engineer, to whom I gave this problem. After he finished it, he said,
-
-> I would love to say I just looked at the code and figured it out, but **I also did a bunch of playing around with it to understand it**. [emphasis mine]
-
-Here we go!
-
----
-
-Remember, the shift from `position: relative` happens *after* the normal flow finishes. Let's start with the normal flow. Ignore `position: relative` for now.
-
-Unchecking `position: relative` gives you this:
-
-<video width="100%" controls loop >
-  <source src="https://s3.amazonaws.com/content.udacity-data.com/courses/fend/ps-css-debugging.mp4" type="video/mp4">
-  Your browser does not support the video tag. <a href="https://s3.amazonaws.com/content.udacity-data.com/courses/fend/ps-css-debugging.mp4" target="_blank">Click here to see the animation.</a>
-</video>
-
-*Notice that the layout of two non-relative siblings stays the same!*
-
-Here is your smoking gun. Look at how the text lines up. You've seen this before.
-
-<<img from baseline showing text lined up w/baselines>>
-Look at the text lining up!
-
-The sibling is an inline box and the "Child" text inside it is its text. As you learned a few pages ago, text will line up with the baseline of a parent. The baseline of the parent is lowered by the extra text inside the relative sibling. As a result, the text of the other siblings is lowered.
-
-Now, realize that the *text* lines up, not the whole inline block. Siblings have a defined height, which then extends below the text. The parent extends lower to fit all of the children. This leaves you with the result of the normal flow!
-
-<<img of w/out relative>>
-The result of the normal flow. Still no relative.
-
-Now that the normal flow has been laid out, the relative shift is applied. It *just so happens* that the relative shift puts the relative div slightly higher than its siblings.
-
-There's something curious about solving the last problem where you applied `vertical-align: top` to `.sibling`. You could have actually solved the problem by applying `vertical-align: top` to `.relative` too! `vertical-align: top` shifts the baseline of the relative element to the top, which means that the parent's baseline is back to the top. As a result, the two other siblings no longer get pushed up. Try it yourself and see what happens!
-
-### Conclusion
-
-A very valid response to this problem would be:
-
-> This is infuriating! Why would anyone do layout this way!?
-
-I'd argue that this is the correct response. Inline blocks are great for arranging the elements inside little widgets like buttons, but you should not rely on them for general layout. The fact that they carry properties of inline elements creates many opportunities for gotchas, much like what you just enountered.
-
-There are much, much, *much* better solutions for page layout. In fact, you'll be working with one of the more popular options for layout, `float`, in the next lesson!
-
-
-
-
-Weird things happening:
-* vertical-align is happening to the *bottom* of the text in the child divs. That means that the "Sibling"s want to line up with "Child". This is a quirk of inline-block.
-* there's a weird shift at first between the tops of all three siblings. It looks about a border's height. Honestly, no clue why that's happening.
-
-
-
-* inline block
-* baseline is set to the lowest level of text of any of the three siblings
-* siblings respect the bottom of the baseline of their siblings
-* siblings are laid out in the normal flow. the siblings respect the lowest "child" as the baseline, hence moving their baslines down
-* setting position: relative; top: 50; just happens to shift the relative sibling near where its other siblings end up
-* but if the relative sibling has vertical-align: top, its baseline is effectively the parents baseline
-* hence the two siblings stay at the top
diff --git a/fend-refresh/lesson6/quiz-why-two-lines/index.html b/fend-refresh/lesson6/quiz-why-two-lines/index.html
deleted file mode 100644
index e988d09f0..000000000
--- a/fend-refresh/lesson6/quiz-why-two-lines/index.html
+++ /dev/null
@@ -1,35 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Why two lines?</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-    }
-    .blue {
-      background-color: #02b3e4;
-    }
-    .boxed {
-      border: 2px solid #2e3d49;
-    }
-    .container {
-      background-color: #dbe2e8;
-      padding: 8px;
-    }
-    .child {
-      display: inline-block;
-      width: 50%;
-    }
-  </style>
-</head>
-<body>
-  <div class="container">
-    <div class="blue boxed child">Child 1</div>
-    <div class="blue boxed child">Child 2</div>
-  </div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/relative-flow/animation.html b/fend-refresh/lesson6/relative-flow/animation.html
deleted file mode 100644
index 6d7eb962b..000000000
--- a/fend-refresh/lesson6/relative-flow/animation.html
+++ /dev/null
@@ -1,34 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Animation Example</title>
-  <style>
-    * {
-      box-sizing: border-box;
-    }
-    div {
-      display: inline-block;
-      height: 50px;
-      width: 200px;
-    }
-    .green {
-      background-color: #009a36;
-    }
-    .blue {
-      background-color: #0098d0;
-      position: relative;
-      top: 10px;
-      left: 10px;
-    }
-    .purple {
-      background-color: #9b4fff;
-    }
-  </style>
-</head>
-<body>
-  <div class="green"></div>
-  <div class="blue"></div>
-  <div class="purple"></div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/relative-flow/shift-three.html b/fend-refresh/lesson6/relative-flow/shift-three.html
deleted file mode 100644
index 00e63fda7..000000000
--- a/fend-refresh/lesson6/relative-flow/shift-three.html
+++ /dev/null
@@ -1,40 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Relative Flow Example</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-    }
-    div {
-      display: inline-block;
-      border: 2px solid #2e3d49;
-      width: 300px;
-      height: 50px;
-    }
-    div:nth-child(even) {
-      background-color: #02b3e4;
-    }
-    div:nth-child(odd) {
-      background-color: #ecc81a;
-    }
-    .shift {
-      /*position: relative;*/
-      top: 10px;
-      left: 10px;
-    }
-    .relative {
-      position: relative;
-    }
-  </style>
-</head>
-<body>
-  <div>I'm an inline-block div!</div>
-  <div class="shift">I'm an inline-block div!</div>
-  <div>I'm an inline-block div!</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/fend-refresh/lesson6/relative-flow/shift-two.html b/fend-refresh/lesson6/relative-flow/shift-two.html
deleted file mode 100644
index 7a80d9de4..000000000
--- a/fend-refresh/lesson6/relative-flow/shift-two.html
+++ /dev/null
@@ -1,39 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Relative Flow Example</title>
-  <link href='https://fonts.googleapis.com/css?family=Source+Sans+Pro' rel='stylesheet' type='text/css'>
-  <style>
-    * {
-      box-sizing: border-box;
-      font-family: 'Source Sans Pro', sans-serif;
-      font-weight: bold;
-    }
-    div {
-      display: inline-block;
-      border: 2px solid #2e3d49;
-      width: 300px;
-      height: 50px;
-    }
-    div:nth-child(even) {
-      background-color: #02b3e4;
-    }
-    div:nth-child(odd) {
-      background-color: #ecc81a;
-    }
-    .shift {
-      /*position: relative;*/
-      top: 10px;
-      left: 10px;
-    }
-    .relative {
-      position: relative;
-    }
-  </style>
-</head>
-<body>
-  <div>I'm an inline-block div!</div>
-  <div class="shift">I'm an inline-block div!</div>
-</body>
-</html>
\ No newline at end of file
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diff --git a/fend-refresh/logos/url-1.png b/fend-refresh/logos/url-1.png
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diff --git a/fend-refresh/logos/url.png b/fend-refresh/logos/url.png
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diff --git a/fend-refresh/logos/webpack-logo-600x419.gif b/fend-refresh/logos/webpack-logo-600x419.gif
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index e8ed9b7d8..000000000
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diff --git a/fend-refresh/logos/yeti.png b/fend-refresh/logos/yeti.png
deleted file mode 100755
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diff --git a/fend-refresh/quiz-assets/l2-whats-wrong.py b/fend-refresh/quiz-assets/l2-whats-wrong.py
deleted file mode 100644
index 0fa8a7808..000000000
--- a/fend-refresh/quiz-assets/l2-whats-wrong.py
+++ /dev/null
@@ -1,41 +0,0 @@
-missing_slash = widget_inputs["check1"]
-p_em_em_p = widget_inputs["check2"]
-bad_span = widget_inputs["check3"]
-p_em_p_em = widget_inputs["check4"]
-
-comments = []
-def commentizer(new):
-    if new not in comments:
-        comments.append(new)
-
-is_correct = False
-
-if not missing_slash:
-    is_correct = is_correct and False
-    commentizer("Take another look at tags of the first one. Are there opening and closing tags?")
-else:
-    is_correct = True
-
-if p_em_em_p:
-    is_correct = is_correct and False
-    commentizer("Take another look at the second one. Is anything wrong besides the typo?")
-else:
-    is_correct = is_correct and True
-
-if not bad_span:
-    is_correct = is_correct and False
-    commentizer("Take another look at the third one. Do the colors look strange? Are there opening and closing tags?")
-else:
-    is_correct = is_correct and True
-
-if not p_em_p_em:
-    is_correct = is_correct and False
-    commentizer("Take another look at the last one and pay close attention to the order of the tags.")
-else:
-    is_correct = is_correct and True
-
-if is_correct:
-    commentizer("Great job! You're learning how to pay attention to details when writing HTML.")
-
-grade_result["comment"] = "\n\n".join(comments)
-grade_result["correct"] = is_correct
\ No newline at end of file
diff --git a/fend-refresh/tablet-assets/l1-overwhelming-2.psd b/fend-refresh/tablet-assets/l1-overwhelming-2.psd
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diff --git a/keynotes/lesson6.key b/keynotes/lesson6.key
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diff --git a/lessons/L0/README.md b/lessons/L0/README.md
deleted file mode 100644
index 5a7c15851..000000000
--- a/lessons/L0/README.md
+++ /dev/null
@@ -1 +0,0 @@
-# Assets for Establishing a Web Developer Mindset
\ No newline at end of file
diff --git a/lessons/L1/README.md b/lessons/L1/README.md
deleted file mode 100644
index b31d61a67..000000000
--- a/lessons/L1/README.md
+++ /dev/null
@@ -1 +0,0 @@
-# Assets for Nanodegree Orientation
\ No newline at end of file
diff --git a/lessons/L2/README.md b/lessons/L2/README.md
deleted file mode 100644
index 6d67f92e9..000000000
--- a/lessons/L2/README.md
+++ /dev/null
@@ -1 +0,0 @@
-# Assets for HTML Syntax
\ No newline at end of file
diff --git a/lessons/L2/fend-refresh-html-structure.mp4 b/lessons/L2/fend-refresh-html-structure.mp4
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diff --git a/lessons/L3/README.md b/lessons/L3/README.md
deleted file mode 100644
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--- a/lessons/L3/README.md
+++ /dev/null
@@ -1 +0,0 @@
-# Assets for CSS Syntax
\ No newline at end of file
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diff --git a/lessons/L3/concepts/02-what-is-css/img/out-cold.png b/lessons/L3/concepts/02-what-is-css/img/out-cold.png
deleted file mode 100644
index a0fd3d7f7..000000000
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diff --git a/lessons/L3/concepts/02-what-is-css/img/retro-beach.png b/lessons/L3/concepts/02-what-is-css/img/retro-beach.png
deleted file mode 100644
index 8e90b8de2..000000000
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diff --git a/lessons/L3/concepts/02-what-is-css/what-is-css-1.html b/lessons/L3/concepts/02-what-is-css/what-is-css-1.html
deleted file mode 100644
index 95becef06..000000000
--- a/lessons/L3/concepts/02-what-is-css/what-is-css-1.html
+++ /dev/null
@@ -1,23 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<title>My Portfolio</title>
-</head>
-<body>
-	<div>
-		<ul>
-			<li><a href="#">Home</a></li>
-			<li><a href="#">About</a></li>
-			<li><a href="#">Portfolio</a></li>
-			<li><a href="#">Contact</a></li>
-		</ul>
-	</div>
-	<div>
-		<h1>My Portfolio</h1>
-		<img src="img/out-cold.png" alt="out cold logo" width="300">
-		<p>This specific design features a 3D floating mountain above a weathered, rugged font to insinuate a winter outdoor theme. This logo would be a perfect fit for an outdoor product company or ski resort.</p>
-		<img src="img/retro-beach.png" alt="retro beach logo" width="300">
-		<p>This specific design features a beach-themed fading sunset with palm trees. The fading vertical bars in the sun resemble warmth as it fades away into the sunset.</p>
-	</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/concepts/02-what-is-css/what-is-css-2.html b/lessons/L3/concepts/02-what-is-css/what-is-css-2.html
deleted file mode 100644
index ca8e5d0be..000000000
--- a/lessons/L3/concepts/02-what-is-css/what-is-css-2.html
+++ /dev/null
@@ -1,37 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<title>My Portfolio</title>
-	<style>
-		.container {
-			display: flex;
-			flex-wrap: wrap;
-		}
-		.menu {
-			width: 15%;
-		}
-		.portfolio {
-			width: 85%;
-		}
-	</style>
-</head>
-<body>
-	<div class="container">
-		<div class="menu">
-			<ul>
-				<li><a href="#">Home</a></li>
-				<li><a href="#">About</a></li>
-				<li><a href="#">Portfolio</a></li>
-				<li><a href="#">Contact</a></li>
-			</ul>
-		</div>
-		<div class="portfolio">
-			<h1>My Portfolio</h1>
-			<img src="img/out-cold.png" alt="out cold logo" width="300">
-			<p>This specific design features a 3D floating mountain above a weathered, rugged font to insinuate a winter outdoor theme. This logo would be a perfect fit for an outdoor product company or ski resort.</p>
-			<img src="img/retro-beach.png" alt="retro beach logo" width="300">
-			<p>This specific design features a beach-themed fading sunset with palm trees. The fading vertical bars in the sun resemble warmth as it fades away into the sunset.</p>
-		</div>
-	</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/concepts/02-what-is-css/what-is-css-3.html b/lessons/L3/concepts/02-what-is-css/what-is-css-3.html
deleted file mode 100644
index 7729ec3f3..000000000
--- a/lessons/L3/concepts/02-what-is-css/what-is-css-3.html
+++ /dev/null
@@ -1,48 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<title>My Portfolio</title>
-	<link href="https://fonts.googleapis.com/css?family=Roboto:400,700" rel="stylesheet" type="text/css">
-	<style>
-		* {
-			font-family: 'Roboto', sans-serif;
-		}
-		.container {
-			display: flex;
-			flex-wrap: wrap;
-		}
-		.menu {
-			width: 15%;
-		}
-		.portfolio {
-			width: 85%;
-		}
-		.item {
-			width: 100%;
-		}
-	</style>
-</head>
-<body>
-	<div class="container">
-		<div class="menu">
-			<ul>
-				<li><a href="#">Home</a></li>
-				<li><a href="#">About</a></li>
-				<li><a href="#">Portfolio</a></li>
-				<li><a href="#">Contact</a></li>
-			</ul>
-		</div>
-		<div class="portfolio">
-			<h1>My Portfolio</h1>
-			<div>
-				<img src="img/out-cold.png" alt="out cold logo" width="300">
-				<p>This specific design features a 3D floating mountain above a weathered, rugged font to insinuate a winter outdoor theme. This logo would be a perfect fit for an outdoor product company or ski resort.</p>
-			</div>
-			<div>
-				<img src="img/retro-beach.png" alt="retro beach logo" width="300">
-				<p>This specific design features a beach-themed fading sunset with palm trees. The fading vertical bars in the sun resemble warmth as it fades away into the sunset.</p>
-			</div>
-		</div>
-	</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/concepts/02-what-is-css/what-is-css-4.html b/lessons/L3/concepts/02-what-is-css/what-is-css-4.html
deleted file mode 100644
index f036e3e4d..000000000
--- a/lessons/L3/concepts/02-what-is-css/what-is-css-4.html
+++ /dev/null
@@ -1,57 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<title>My Portfolio</title>
-	<link href="https://fonts.googleapis.com/css?family=Roboto:400,700" rel="stylesheet" type="text/css">
-	<style>
-		* {
-			font-family: 'Roboto', sans-serif;
-		}
-		.container {
-			display: flex;
-			flex-wrap: wrap;
-		}
-		.menu {
-			width: 15%;
-		}
-		.portfolio {
-			width: 85%;
-		}
-		.item {
-			width: 100%;
-			clear: both;
-		}
-		.item img {
-			float: left
-		}
-		.item span {
-			display: table-cell;
-    		vertical-align: middle;
-        	height: 240px;
-		}
-	</style>
-</head>
-<body>
-	<div class="container">
-		<div class="menu">
-			<ul>
-				<li><a href="#">Home</a></li>
-				<li><a href="#">About</a></li>
-				<li><a href="#">Portfolio</a></li>
-				<li><a href="#">Contact</a></li>
-			</ul>
-		</div>
-		<div class="portfolio">
-			<h1>My Portfolio</h1>
-			<div class="item">
-				<img src="img/out-cold.png" alt="out cold logo" width="300">
-				<span>This specific design features a 3D floating mountain above a weathered, rugged font to insinuate a winter outdoor theme. This logo would be a perfect fit for an outdoor product company or ski resort.</span>
-			</div>
-			<div class="item">
-				<img src="img/retro-beach.png" alt="retro beach logo" width="300">
-				<span>This specific design features a beach-themed fading sunset with palm trees. The fading vertical bars in the sun resemble warmth as it fades away into the sunset.</span>
-			</div>
-		</div>
-	</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/concepts/02-what-is-css/youtube-css.png b/lessons/L3/concepts/02-what-is-css/youtube-css.png
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diff --git a/lessons/L3/concepts/02-what-is-css/youtube-webpage.png b/lessons/L3/concepts/02-what-is-css/youtube-webpage.png
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diff --git a/lessons/L3/concepts/03-css-or-html/html-or-css-1.html b/lessons/L3/concepts/03-css-or-html/html-or-css-1.html
deleted file mode 100644
index 44d718a5a..000000000
--- a/lessons/L3/concepts/03-css-or-html/html-or-css-1.html
+++ /dev/null
@@ -1,17 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<title>HTML or CSS?</title>
-</head>
-<body>
-	<img src="img/bread.jpg" alt="bread">
-	<ol>
-		<li>First</li>
-		<li>Second</li>
-		<li>Third</li>
-		<li>Fourth</li>
-	</ol>
-	<p>Slow-carb etsy venmo ugh asymmetrical. Polaroid VHS williamsburg stumptown shoreditch beard you probably haven't heard of them, venmo before they sold out microdosing 90's listicle kinfolk twee farm-to-table. Pinterest blue bottle iPhone, etsy pickled neutra schlitz irony taxidermy. Street art +1 chicharrones, kickstarter etsy blog mlkshk flexitarian freegan skateboard cardigan listicle. Knausgaard direct trade literally biodiesel cornhole cold-pressed, cardigan next level typewriter thundercats polaroid umami chicharrones. Irony XOXO mustache fanny pack. Taxidermy literally mixtape, twee thundercats polaroid knausgaard ugh.</p>
-	<p>8-bit twee fanny pack, farm-to-table paleo cred intelligentsia flexitarian chambray vice shabby chic PBR&amp;B. Roof party mumblecore gluten-free, try-hard DIY put a bird on it ethical wayfarers wolf vinyl art party ramps synth. Fap selfies kale chips humblebrag aesthetic, tote bag you probably haven't heard of them irony +1 gochujang bushwick. Authentic raw denim humblebrag disrupt you probably haven't heard of them kinfolk, portland four loko chia direct trade normcore 3 wolf moon. Yuccie YOLO pug hella, shoreditch cold-pressed sustainable twee beard gastropub gluten-free umami retro trust fund. Blue bottle gochujang aesthetic celiac gluten-free. Selvage selfies flexitarian mustache, schlitz yr DIY four loko sartorial.</p>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/concepts/03-css-or-html/html-or-css-1.png b/lessons/L3/concepts/03-css-or-html/html-or-css-1.png
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diff --git a/lessons/L3/concepts/03-css-or-html/html-or-css-2.html b/lessons/L3/concepts/03-css-or-html/html-or-css-2.html
deleted file mode 100644
index 48bba5b63..000000000
--- a/lessons/L3/concepts/03-css-or-html/html-or-css-2.html
+++ /dev/null
@@ -1,13 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<title>HTML or CSS?</title>
-</head>
-<body>
-	<h1>Art party asymmetrical fixie</h1>
-	<h2>VHS art party poutine </h2>
-	<h3>Crucifix seitan ethical scenester</h3>
-	<h4>Vegan four dollar toast</h4>
-	<a href="#">Brunch aesthetic mlkshk pabst</a>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/concepts/03-css-or-html/html-or-css-2.png b/lessons/L3/concepts/03-css-or-html/html-or-css-2.png
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diff --git a/lessons/L3/concepts/03-css-or-html/html-or-css-3.png b/lessons/L3/concepts/03-css-or-html/html-or-css-3.png
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diff --git a/lessons/L3/concepts/03-css-or-html/image-form.jpeg b/lessons/L3/concepts/03-css-or-html/image-form.jpeg
deleted file mode 100644
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diff --git a/lessons/L3/concepts/03-css-or-html/img/bread.jpg b/lessons/L3/concepts/03-css-or-html/img/bread.jpg
deleted file mode 100644
index 0e62b6a6e..000000000
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diff --git a/lessons/L3/concepts/03-css-or-html/instructions.md b/lessons/L3/concepts/03-css-or-html/instructions.md
deleted file mode 100644
index a8c50994b..000000000
--- a/lessons/L3/concepts/03-css-or-html/instructions.md
+++ /dev/null
@@ -1,9 +0,0 @@
-## Instructions
-
-### Which example is using CSS?
-
-<br>
-
-- ![option 1](http://udacity.github.io/fend/lessons/L3/concepts/03-css-or-html/html-or-css-1.png)
-- ![option 2](http://udacity.github.io/fend/lessons/L3/concepts/03-css-or-html/html-or-css-2.png)
-- ![option 3](http://udacity.github.io/fend/lessons/L3/concepts/03-css-or-html/html-or-css-3.png)
\ No newline at end of file
diff --git a/lessons/L3/concepts/04-css-rulesets/coca-cola.css b/lessons/L3/concepts/04-css-rulesets/coca-cola.css
deleted file mode 100644
index 437e1aa4f..000000000
--- a/lessons/L3/concepts/04-css-rulesets/coca-cola.css
+++ /dev/null
@@ -1,1037 +0,0 @@
-/*!
- * Bootstrap v2.1.0
- *
- * Copyright 2012 Twitter, Inc
- * Licensed under the Apache License v2.0
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Designed and built with all the love in the world @twitter by @mdo and @fat.
- */.clearfix{*zoom:1}
-.clearfix:before,.clearfix:after{display:table;content:"";line-height:0}
-.clearfix:after{clear:both}
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-.cq-sidekick-edit{background-image:url(../../../libs/cq/ui/widgets/themes/default/widgets/wcm/Sidekick/edit.png)!important}
-html.mobile #recaptcha_area{margin-left:-9px}
-#recaptcha_input_area{position:relative}
-#recaptcha_response_field{position:absolute;top:0;height:20px;left:0}
-/*!
- *  Font Awesome 3.2.1
- *  the iconic font designed for Bootstrap
- *  ------------------------------------------------------------------------------
- *  The full suite of pictographic icons, examples, and documentation can be
- *  found at http://fontawesome.io.  Stay up to date on Twitter at
- *  http://twitter.com/fontawesome.
- *
- *  License
- *  ------------------------------------------------------------------------------
- *  - The Font Awesome font is licensed under SIL OFL 1.1 -
- *    http://scripts.sil.org/OFL
- *  - Font Awesome CSS, LESS, and SASS files are licensed under MIT License -
- *    http://opensource.org/licenses/mit-license.html
- *  - Font Awesome documentation licensed under CC BY 3.0 -
- *    http://creativecommons.org/licenses/by/3.0/
- *  - Attribution is no longer required in Font Awesome 3.0, but much appreciated:
- *    "Font Awesome by Dave Gandy - http://fontawesome.io"
- *
- *  Author - Dave Gandy
- *  ------------------------------------------------------------------------------
- *  Email: dave@fontawesome.io
- *  Twitter: http://twitter.com/byscuits
- *  Work: Lead Product Designer @ Kyruus - http://kyruus.com
- */@font-face{font-family:'FontAwesome';src:url('main/styles/fonts/fontawesome-webfont.eot?v=3.2.1');src:url('main/styles/fonts/fontawesome-webfont.eot?#iefix&v=3.2.1') format('embedded-opentype'),url('main/styles/fonts/fontawesome-webfont.woff?v=3.2.1') format('woff'),url('main/styles/fonts/fontawesome-webfont.ttf?v=3.2.1') format('truetype'),url('main/styles/fonts/fontawesome-webfont.svg#fontawesomeregular?v=3.2.1') format('svg');font-weight:normal;font-style:normal}
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-html[dir="rtl"] #addToHomeScreen{text-align:right}
-html[dir="rtl"] #addToHomeScreen{text-align:right}
-#addToHomeScreen.addToHomeIpad{width:268px;font-size:18px;padding:14px}
-#addToHomeScreen.addToHomeWide{width:296px}
-#addToHomeScreen.addToHomeIpad.addToHomeWide{width:320px;font-size:18px;padding:14px}
-#addToHomeScreen .addToHomeArrow{position:absolute;background-image:-webkit-gradient(linear,0 0,100% 100%,color-stop(0,rgba(204,204,204,0)),color-stop(0.4,rgba(204,204,204,0)),color-stop(0.4,#ccc));border-width:0 1px 1px 0;border-style:solid;border-color:#505050;width:16px;height:16px;-webkit-transform:rotateZ(45deg);bottom:-9px;left:50%;margin-left:-8px;-webkit-box-shadow:inset -1px -1px 0 #a9a9a9;-webkit-border-bottom-right-radius:2px}
-#addToHomeScreen.addToHomeIpad .addToHomeArrow{-webkit-transform:rotateZ(-135deg);background-image:-webkit-gradient(linear,0 0,100% 100%,color-stop(0,rgba(238,238,238,0)),color-stop(0.4,rgba(238,238,238,0)),color-stop(0.4,#eee));-webkit-box-shadow:inset -1px -1px 0 #fff;top:-9px;bottom:auto;left:50%}
-#addToHomeScreen .addToHomeClose{-webkit-box-sizing:border-box;position:absolute;right:4px;top:4px;width:18px;height:18px;line-height:14px;text-align:center;text-indent:1px;-webkit-border-radius:9px;background:rgba(0,0,0,0.12);color:#707070;-webkit-box-shadow:0 1px 0 #fff;font-size:16px}
-html[dir="rtl"] #addToHomeScreen .addToHomeClose{right:auto;left:4px}
-html[dir="rtl"] #addToHomeScreen .addToHomeClose{right:auto;left:4px}
-#addToHomeScreen .addToHomePlus{font-weight:bold;font-size:1.3em}
-#addToHomeScreen .addToHomeShare{display:inline-block;width:18px;height:15px;background-repeat:no-repeat;background-image:url("data:image/png;base64,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");background-size:18px 15px;text-indent:-9999em;overflow:hidden}
-#addToHomeScreen .addToHomeTouchIcon{display:block;float:left;-webkit-border-radius:6px;-webkit-box-shadow:0 1px 3px rgba(0,0,0,0.5),inset 0 0 2px rgba(255,255,255,0.9);background-repeat:no-repeat;width:57px;height:57px;-webkit-background-size:57px 57px;margin:0 12px 0 0;border:1px solid #333;-webkit-background-clip:padding-box}
-html[dir="rtl"] #addToHomeScreen .addToHomeTouchIcon{float:right}
-html[dir="rtl"] #addToHomeScreen .addToHomeTouchIcon{float:right}
-html[dir="rtl"] #addToHomeScreen .addToHomeTouchIcon{margin:0 0 0 12px}
-html[dir="rtl"] #addToHomeScreen .addToHomeTouchIcon{margin:0 0 0 12px}
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diff --git a/lessons/L3/concepts/04-css-rulesets/hello-world.html b/lessons/L3/concepts/04-css-rulesets/hello-world.html
deleted file mode 100644
index e3becdd87..000000000
--- a/lessons/L3/concepts/04-css-rulesets/hello-world.html
+++ /dev/null
@@ -1,16 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<title>Hello, world!</title>
-	<style>
-		p {
-			color: blue;
-		}
-	</style>
-</head>
-<body>
-	<h1>Hello, world!</h1>
-	<p>Are you ready for your first challenge?</p>
-	<p>Let's add some style to this webpage!</p>
-</body>
-</html>
diff --git a/lessons/L3/concepts/05-css-syntax/answer.html b/lessons/L3/concepts/05-css-syntax/answer.html
deleted file mode 100644
index c1b989fc6..000000000
--- a/lessons/L3/concepts/05-css-syntax/answer.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Change the color of the heading "Hello, world!" to green. -->
-
-<html>
-<head>
-	<title>Quiz - Hello, world!</title>
-    <style>
-		p {
-			color: blue;
-		}
-        h1 {
-        	color: green;
-        }
-    </style>
-</head>
-<body>
-	<h1>Hello, world!</h1>
-	<p>Are you ready for your first challenge?</p>
-	<p>Let's add some style to this webpage!</p>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/concepts/05-css-syntax/instructions.md b/lessons/L3/concepts/05-css-syntax/instructions.md
deleted file mode 100644
index c97a17e2c..000000000
--- a/lessons/L3/concepts/05-css-syntax/instructions.md
+++ /dev/null
@@ -1,5 +0,0 @@
-## Instructions
-
-### Add the following changes to this webpage:
-
-* change the color of "Hello, world!" to green
\ No newline at end of file
diff --git a/lessons/L3/concepts/05-css-syntax/question.html b/lessons/L3/concepts/05-css-syntax/question.html
deleted file mode 100644
index 53619e335..000000000
--- a/lessons/L3/concepts/05-css-syntax/question.html
+++ /dev/null
@@ -1,20 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Change the color of the heading "Hello, world!" to green. -->
-
-<html>
-<head>
-	<title>Quiz - Hello, world!</title>
-    <style>
-		p {
-			color: blue;
-		}
-        /* add CSS here */
-    </style>
-</head>
-<body>
-	<h1>Hello, world!</h1>
-	<p>Are you ready for your first challenge?</p>
-	<p>Let's add some style to this webpage!</p>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/concepts/05-css-syntax/tests.js b/lessons/L3/concepts/05-css-syntax/tests.js
deleted file mode 100644
index ad2b91016..000000000
--- a/lessons/L3/concepts/05-css-syntax/tests.js
+++ /dev/null
@@ -1,631 +0,0 @@
-var Grader = (function() {
-  // elem refers to css selector
-
-  // http://stackoverflow.com/questions/1068834/object-comparison-in-javascript?lq=1
-  function deepCompare () {
-    var i, l, leftChain, rightChain;
-
-    function compare2Objects (x, y) {
-      var p;
-
-      // remember that NaN === NaN returns false
-      // and isNaN(undefined) returns true
-      if (isNaN(x) && isNaN(y) && typeof x === 'number' && typeof y === 'number') {
-        return true;
-      }
-
-      // Compare primitives and functions.
-      // Check if both arguments link to the same object.
-      // Especially useful on step when comparing prototypes
-      if (x === y) {
-        return true;
-      }
-
-      // Works in case when functions are created in constructor.
-      // Comparing dates is a common scenario. Another built-ins?
-      // We can even handle functions passed across iframes
-      if ((typeof x === 'function' && typeof y === 'function') ||
-        (x instanceof Date && y instanceof Date) ||
-        (x instanceof RegExp && y instanceof RegExp) ||
-        (x instanceof String && y instanceof String) ||
-        (x instanceof Number && y instanceof Number)) {
-          return x.toString() === y.toString();
-      }
-
-      // At last checking prototypes as good a we can
-      if (!(x instanceof Object && y instanceof Object)) {
-        return false;
-      }
-
-      if (x.isPrototypeOf(y) || y.isPrototypeOf(x)) {
-        return false;
-      }
-
-      if (x.constructor !== y.constructor) {
-        return false;
-      }
-
-      if (x.prototype !== y.prototype) {
-        return false;
-      }
-
-      // Check for infinitive linking loops
-      if (leftChain.indexOf(x) > -1 || rightChain.indexOf(y) > -1) {
-         return false;
-      }
-
-      // Quick checking of one object beeing a subset of another.
-      // todo: cache the structure of arguments[0] for performance
-      for (p in y) {
-        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {
-          return false;
-        }
-        else if (typeof y[p] !== typeof x[p]) {
-          return false;
-        }
-      }
-
-      for (p in x) {
-        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {
-          return false;
-        }
-        else if (typeof y[p] !== typeof x[p]) {
-          return false;
-        }
-
-        switch (typeof (x[p])) {
-          case 'object':
-          case 'function':
-            leftChain.push(x);
-            rightChain.push(y);
-
-            if (!compare2Objects (x[p], y[p])) {
-              return false;
-            }
-
-            leftChain.pop();
-            rightChain.pop();
-            break;
-
-          default:
-            if (x[p] !== y[p]) {
-              return false;
-            }
-            break;
-        }
-      }
-
-      return true;
-    }
-
-    if (arguments.length < 1) {
-      return true; //Die silently? Don't know how to handle such case, please help...
-      // throw "Need two or more arguments to compare";
-    }
-
-    for (i = 1, l = arguments.length; i < l; i++) {
-
-      leftChain = []; //Todo: this can be cached
-      rightChain = [];
-
-      if (!compare2Objects(arguments[0], arguments[i])) {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  function Queue(grader) {
-    this.grader = grader;
-    this.gradingSteps = [];
-    this.flushing = false;
-    this.alwaysGo = false;
-  };
-
-  Queue.prototype = {
-    add: function(callback, messages, keepGoing) {
-      if (keepGoing !== false) {
-        keepGoing = true;
-      }
-
-      if (!callback) {
-        throw new Error("UD: Every test added to the queue must have a valid function.");
-      }
-
-      this.gradingSteps.push({
-        callback: callback,
-        isCorrect: false,
-        wrongMessage: messages.wrongMessage || null,
-        comment: messages.comment || null,
-        category: messages.category || null,
-        keepGoing: keepGoing
-      });
-    },
-
-    flush: function() {
-      if (!this.flushing) {
-        this.flushing = true;
-      }
-      this.step();
-    },
-
-    clear: function() {
-      this.flushing = false;
-      this.gradingSteps = [];
-    },
-
-    step: function() {
-      if (this.gradingSteps.length === 0) {
-        this.clear();
-      }
-
-      if (this.flushing) {
-        var test = this.gradingSteps.shift();
-
-        try {
-          test.isCorrect = test.callback();
-        } catch (e) {
-          console.log(e);
-          test.isCorrect = false;
-        }
-
-        if (!test.isCorrect) {
-          // console.log(test.wrongMessage + " " + test.isCorrect);
-        }
-
-        this.registerResults(test);
-
-        if (test.isCorrect || test.keepGoing || this.alwaysGo) {
-          this.step();
-        } else {
-          this.clear();
-        }
-      }
-    },
-
-    registerResults: function (test) {
-      this.grader.registerResults(test);
-    }
-  };
-
-  function Grader (categoryMessages) {
-    var self = this;
-
-    this.specificFeedback = [];
-    this.comments = [];
-    this.isCorrect = false;
-    this.correctHasChanged = false;
-    this.queue = new Queue(self);
-    this.categoryMessages = categoryMessages || null;
-    this.generalFeedback = [];
-  };
-
-  Grader.prototype = {
-    addTest: function (callback, messages, keepGoing) {
-      this.queue.add(callback, messages, keepGoing);
-    },
-
-    runTests: function (options) {
-      if (options) {
-        this.queue.alwaysGo = options.ignoreCheckpoints || false;
-      }
-      this.queue.flush();
-    },
-
-    registerResults: function (test) {
-      this.generateSpecificFeedback(test);
-      this.generateGeneralFeedback(test);
-      this.setCorrect(test);
-    },
-
-    // TODO: CHECK ALL OF THIS LOGIC!
-    generateSpecificFeedback: function (test) {
-      if (!test.isCorrect && test.wrongMessage) {
-        this.addSpecificFeedback(test.wrongMessage);
-      } else if (test.isCorrect && test.comment) {
-        this.addComment(test.comment)
-      }
-    },
-
-    generateGeneralFeedback: function (test) {
-      if (!test.isCorrect && test.category) {
-        if (this.generalFeedback.indexOf(this.categoryMessages[test.category]) === -1) {
-          this.generalFeedback.push(this.categoryMessages[test.category]);
-        }
-      }
-    },
-
-    setCorrect: function (test) {
-      if (this.correctHasChanged) {
-        this.isCorrect = this.isCorrect && test.isCorrect;
-      } else {
-        this.correctHasChanged = true;
-        this.isCorrect = test.isCorrect;
-      }
-    },
-
-    addSpecificFeedback: function (feedback) {
-      this.specificFeedback.push(feedback);
-    },
-
-    addComment: function (feedback) {
-      this.comments.push(feedback);
-    },
-
-    getFormattedWrongMessages: function (separator) {
-      var allMessages, message;
-
-      allMessages = this.specificFeedback.concat(this.generalFeedback);
-      message = allMessages.join(separator);
-
-      return message;
-    },
-
-    getFormattedComments: function (separator) {
-      return this.comments.join(separator);
-    },
-
-    isType: function (theirValue, expectedType, showDefaultWrongMessage) {
-      showDefaultWrongMessage = showDefaultWrongMessage || false;
-      var isCorrect = false;
-
-      if (typeof theirValue !== expectedType) {
-
-        if (typeof theirValue === 'function') {
-          theirValue = theirValue.name;
-        };
-
-        isCorrect = false;
-      } else if (typeof theirValue === expectedType){
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isInstance: function (theirValue, expectedInstance, showDefaultWrongMessage) {
-      showDefaultWrongMessage = showDefaultWrongMessage || false;
-      var isCorrect = false;
-
-      if (theirValue instanceof expectedInstance !== true) {
-
-        isCorrect = false;
-      } else if (theirValue instanceof expectedInstance === true){
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isValue: function (theirValue, expectedValue, showDefaultWrongMessage) {
-      showDefaultWrongMessage = showDefaultWrongMessage || false;
-      var isCorrect = false;
-
-      if (!deepCompare(theirValue, expectedValue)) {
-        isCorrect = false;
-      } else if (deepCompare(theirValue, expectedValue)) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isInRange: function (theirValue, lower, upper, showDefaultWrongMessage) {
-      showDefaultWrongMessage = showDefaultWrongMessage || false;
-      var isCorrect = false;
-
-      if (typeof theirValue !== 'number' || isNaN(theirValue)) {
-        isCorrect = false
-      } else if (theirValue > upper || theirValue < lower) {
-        isCorrect = false;
-
-      } else if (theirValue < upper || theirValue > lower) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    // TODO: does this ever actually fail? or does it just error?
-    isSet: function (value, showDefaultWrongMessage) {
-      showDefaultWrongMessage = showDefaultWrongMessage || false;
-      var isCorrect = false;
-
-      if (value === undefined) {
-        isCorrect = false;
-
-      } else {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isjQuery: function (elem) {
-      // could use obj.jquery, which will only return true if it is a jquery object
-      if (elem instanceof $) return true;
-      return false;
-    },
-
-    hasCorrectTag: function (elem, tag) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.is(tag)) return true;
-      return false;
-    },
-
-    hasCorrectClass: function (elem, className) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.hasClass(className)) return true;
-      return false;
-    },
-
-    hasCorrectId: function (elem, id) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.is('#' + id)) return true;
-      return false;
-    },
-
-    hasCorrectText: function(elem, text) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasText = false;
-      var re = new RegExp(text);
-      if (elem.text().match(re)) {
-        hasText = true;
-      }
-      return hasText;
-    },
-
-    hasAttr: function (elem, attrName, correctAttr) {
-      var isCorrect = false;
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (correctAttr && elem.attr(attrName) === correctAttr) {
-        isCorrect = true;
-      } else if (!correctAttr && elem.attr(attrName)) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    hasCorrectLength: function (elems, _length) {
-      if (!this.isjQuery(elems)) {
-        elems = $(elems);
-      }
-      var cLength = elems.length;
-      if (cLength === _length) return true;
-      return false;
-    },
-
-    isCorrectElem: function (elem, correctElem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.is(correctElem)) return true;
-      return false;
-    },
-
-    isCorrectCollection: function (collection, correctCollection) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (collection.is(correctCollection)) return true;
-      return false;
-    },
-
-    hasCorrectStyle: function (elem, cssProperty, _correctStyle) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasCorrectStyle = false;
-      /* if one style is passed, convert to array */
-      if (typeof _correctStyle === 'string') {
-        _correctStyle = [_correctStyle];
-      }
-      var currentStyle = elem.css(cssProperty);
-      for (var i = 0; i < _correctStyle.length; i++) {
-          if (currentStyle === _correctStyle[i]) {
-            hasCorrectStyle = true;
-          }
-       }
-      return hasCorrectStyle;
-    },
-
-    hasCalledFunction: function (func) {
-      var hasCalledFunction = false;
-      $("script:contains(." + func + ")").each(function() {
-        if ($(this).text().search("For this quiz") !== -1 && $(this).text().search("returns true if") === -1) hasCalledFunction = true;
-      });
-      return hasCalledFunction;
-    },
-
-    doesExistInParent: function (elem, parentElem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (!this.isjQuery(parentElem)) {
-        parentElem = $(parentElem);
-      }
-      if (parentElem.find(elem).length > 0) return true;
-      return false;
-    },
-
-    doesNotExistInParent: function (elem, parentElem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (!this.isjQuery(parentElem)) {
-        parentElem = $(parentElem);
-      }
-      if (parentElem.find(elem).length === 0) return true;
-      return false;
-    },
-
-    doesExist: function (elem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.length > 0) return true;
-      return false;
-    },
-
-    areSiblings: function (elem1, elem2) {
-      if (!this.isjQuery(elem1)) {
-        elem1 = $(elem1);
-      }
-      if (!this.isjQuery(elem2)) {
-        elem2 = $(elem2);
-      }
-      if (elem1.siblings(elem2).length > 0) return true;
-      return false;
-    },
-
-    /**
-     * Determine if an elem is an immediate child of a parent.
-     * @param  {String}  elem       CSS selector
-     * @param  {[type]}  parentElem CSS selector or $
-     */
-    isImmediateChild: function (elem, parentElem) {
-      var isCorrect = false;
-      if (this.isjQuery(elem)) {
-        throw new Error("elem needs to be a string for Grader.isImmediateChild()");
-      }
-      if (!this.isjQuery(parentElem)) {
-        parentElem = $(parentElem);
-      }
-      if (parentElem.children(elem).length > 0) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    hasParent: function (elem, parentElem) {
-      var isCorrect = false;
-      if (this.isjQuery(parentElem)) {
-        throw new Error("parentElem needs to be a string for Grader.hasParent()");
-      }
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.closest(parentElem).length > 0) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    }
-  }
-
-  function sendResultsToExecutor() {
-    var output = {
-      isCorrect: false,
-      test_feedback: "",
-      test_comments: "",
-      congrats: ""
-    }
-    for (arg in arguments) {
-      var thisIsCorrect = arguments[arg].isCorrect;
-      var thisTestFeedback = arguments[arg].getFormattedWrongMessages();
-      var thisTestComment = arguments[arg].getFormattedComments();
-      if (typeof thisIsCorrect !== 'boolean') {
-        thisIsCorrect = false;
-      }
-
-      switch (arg) {
-        case '0':
-          output.congrats = arguments[arg];
-        case '1':
-          output.isCorrect = thisIsCorrect;
-          output.test_feedback = thisTestFeedback;
-          output.test_comments = thisTestComment;
-          break;
-        default:
-          output.isCorrect = thisIsCorrect && output.isCorrect;
-          if (output.test_feedback !== "") {
-            output.test_feedback = [output.test_feedback, thisTestFeedback].join('\n');
-          } else {
-            output.test_feedback = thisTestFeedback;
-          }
-
-          if (output.test_comments !== "") {
-            output.test_comments = [output.test_comments, thisTestFeedback].join('\n');
-          } else {
-            output.test_comments = thisTestComment;
-          }
-          break;
-      }
-    }
-    output = JSON.stringify(output);
-    console.info("UDACITY_RESULT:" + output);
-  }
-  return Grader;
-})();
-
-function performTesting() {
-  return {'result': 'noop'}
-}
-
-function performSubmission() {
-  var grader = new Grader({
-    // can add shared messages here
-  });
-
-  grader.addTest(function() {
-    return grader.hasCorrectText($('style'), 'h1');
-  }, {
-    wrongMessage: "Have you added a selector for h1 yet? It looks like it's missing."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasCorrectText($('style'), 'h1\\s*{\\s*.*\\s*}');
-  }, {
-    wrongMessage: "Did you remember to add curly braces after the selector? It should look like `h1 { ... }`."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasCorrectText($('style'), 'h1\\s*{\\s*.*color.*\\s*}');
-  }, {
-    wrongMessage: "You should be using the property `color` to change the color of \"Hello, world!\"."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasCorrectStyle($('h1'), 'color', 'rgb(0, 128, 0)');
-  }, {
-    wrongMessage: "\"Hello, world!\" needs to be green."
-  });
-
-  grader.addTest(function() {
-    return (grader.hasCorrectText($('style'), 'h1\\s*{\\s*color\\s*:\\s*.*\\s*}') && !grader.hasCorrectStyle($('h1'), 'color', 'rgb(0, 0, 0)'));
-  }, {
-    wrongMessage: "\"Hello, world!\" did not change color. Check the value you passed to color."
-  }, false);
-
-  grader.addTest(function() {
-    return !(!grader.hasCorrectStyle($('h1'), 'color', 'rgb(0, 0, 0)') && !grader.hasCorrectStyle($('h1'), 'color', 'rgb(0, 128, 0)') && !grader.hasCorrectStyle($('h1'), 'color', 'rgb(0, 255, 0)'));
-  }, {
-    wrongMessage: "You changed the color of \"Hello, world!\", but it's not green."
-  }, false);
-
-  grader.addTest(function() {
-    return !(!grader.hasCorrectStyle($('h1'), 'color', 'rgb(0, 128, 0)') && grader.hasCorrectStyle($('h1'), 'color', 'rgb(0, 255, 0)'));
-  }, {
-    wrongMessage: "Did you use color: #00ff00 or color: rgb(0, 255, 0)?\nNeither of those are actually \"green\". Try Googling the named color value for green."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasCorrectText($('style'), 'h1\\s*{\\s*color\\s*:\\s*green;\\s*}');
-  }, {
-    wrongMessage: "This works, but you should end every declaration with a semi-colon.\nAdd a semi-colon after green to pass the test."
-  });
-
-  grader.runTests();
-
-  result = {
-    is_correct: grader.isCorrect,
-    test_feedback: grader.getFormattedWrongMessages('\n'),
-    test_comments: grader.getFormattedComments('\n'),
-    congrats: "Perfect! Congratulations on adding your first style to a webpage."
-  };
-  return result;
-};
\ No newline at end of file
diff --git a/lessons/L3/concepts/06-tag-selectors/image-form.jpeg b/lessons/L3/concepts/06-tag-selectors/image-form.jpeg
deleted file mode 100644
index 747d0925f..000000000
Binary files a/lessons/L3/concepts/06-tag-selectors/image-form.jpeg and /dev/null differ
diff --git a/lessons/L3/concepts/06-tag-selectors/instructions.md b/lessons/L3/concepts/06-tag-selectors/instructions.md
deleted file mode 100644
index 2c84f1d81..000000000
--- a/lessons/L3/concepts/06-tag-selectors/instructions.md
+++ /dev/null
@@ -1,12 +0,0 @@
-## Instructions
-
-### Which paragraph(s) would be affected by the style?
-
-```css
-p {
-  text-align: right;
-}
-```
-
-- the first paragraph
-- all paragraphs
\ No newline at end of file
diff --git a/lessons/L3/concepts/06-tag-selectors/tag-selectors.html b/lessons/L3/concepts/06-tag-selectors/tag-selectors.html
deleted file mode 100644
index c8ba6b5ed..000000000
--- a/lessons/L3/concepts/06-tag-selectors/tag-selectors.html
+++ /dev/null
@@ -1,18 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<title>Tag Selectors</title>
-	<style>
-		body {
-			width: 800px;
-			margin: 0 auto;
-		}
-	</style>
-</head>
-<body>
-	<p>90's chia blue bottle bushwick, kinfolk vice photo booth chillwave asymmetrical. Disrupt hammock vice twee thundercats. IPhone church-key 8-bit, lomo 90's DIY locavore godard sartorial mlkshk farm-to-table franzen next level typewriter. Pinterest gastropub pour-over ethical church-key kombucha banh mi single-origin coffee DIY swag. Church-key affogato celiac, deep v asymmetrical blog try-hard quinoa drinking vinegar. Sriracha banjo food truck tacos, four loko slow-carb post-ironic. Echo park master cleanse kinfolk man braid gluten-free slow-carb.</p>
-	<p>Try-hard fashion axe umami flannel kogi plaid, ugh offal deep v franzen cold-pressed YOLO. Cornhole quinoa semiotics kickstarter. Fashion axe etsy tilde kombucha, twee meditation leggings literally thundercats chia. Listicle pickled yuccie beard. Messenger bag taxidermy asymmetrical schlitz poutine. Pickled waistcoat blue bottle mustache austin. Farm-to-table PBR&amp;B brooklyn pour-over, venmo letterpress wayfarers cardigan organic.</p>
-	<p>Vegan yr bicycle rights four dollar toast. Migas pop-up pour-over chambray, mumblecore neutra man braid mixtape pug cred microdosing 8-bit fashion axe vegan. Four dollar toast chia squid, williamsburg brooklyn portland pug shabby chic banjo four loko narwhal kickstarter craft beer. Truffaut kitsch gochujang gluten-free echo park. Venmo microdosing humblebrag typewriter franzen keytar, sriracha freegan cold-pressed 90's. Dreamcatcher selfies migas thundercats, helvetica gentrify schlitz stumptown pug gluten-free. Keytar ramps everyday carry XOXO, bitters aesthetic sustainable VHS umami yr single-origin coffee four loko tote bag.</p>
-	<p>Asymmetrical letterpress franzen, stumptown bitters roof party next level portland mumblecore artisan. Tumblr direct trade austin ugh kickstarter cardigan. Ethical ennui shabby chic roof party wolf, keffiyeh helvetica shoreditch chia paleo 8-bit cronut vegan. Ethical paleo man braid, 3 wolf moon forage bitters craft beer 8-bit banh mi cronut bicycle rights. Chia williamsburg gochujang artisan freegan. Cronut flannel tilde post-ironic small batch taxidermy. Cold-pressed schlitz distillery seitan, mixtape hoodie church-key bespoke kogi selfies wolf letterpress.</p>
-</body>
-</html>
diff --git a/lessons/L3/concepts/07-attributes-and-selectors/attributes-and-selectors.html b/lessons/L3/concepts/07-attributes-and-selectors/attributes-and-selectors.html
deleted file mode 100644
index d851afc0c..000000000
--- a/lessons/L3/concepts/07-attributes-and-selectors/attributes-and-selectors.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<meta charset="utf-8">
-	<title>My Book Website</title>
-	<style>
-		.book-summary {
-			color: blue;
-		}
-		#site-description {
-			color: red;
-		}
-	</style>
-</head>
-<body>
-	<h1>My Book Website</h1>
-	<p id="site-description">Check out my awesome book website. I've listed some of my favorite books below.</p>
-	<hr>
-	<h2 class="book-title">Robinson Crusoe</h2>
-	<p class="book-summary">Thought to have been inspired by the true-life experiences of a marooned sailor, Robinson Crusoe tells the story of the sole survivor of a shipwreck, stranded on a Caribbean island, who prevails against all odds, enduring almost three decades of solitude while mastering both himself and his strange new world.</p>
-	<h2 class="book-title">Hatchet</h2>
-	<p class="book-summary">Thirteen-year-old Brian Robeson is on his way to visit his father when the single-engine plane in which he is flying crashes. Suddenly, Brian finds himself alone in the Canadian wilderness with nothing but a tattered Windbreaker and the hatchet his mother gave him as a present—and the dreadful secret that has been tearing him apart since his parent’s divorce. But now Brian has no time for anger, self pity, or despair—it will take all his know-how and determination, and more courage than he knew he possessed, to survive.</p>
-	<h2 class="book-title">The Old Man and The Sea</h2>
-	<p class="book-summary">The Old Man and the Sea is one of Hemingway's most enduring works. Told in language of great simplicity and power, it is the story of an old Cuban fisherman, down on his luck, and his supreme ordeal -- a relentless, agonizing battle with a giant marlin far out in the Gulf Stream.</p>
-</body>
-</html>
diff --git a/lessons/L3/concepts/08-using-selectors/image-form.jpeg b/lessons/L3/concepts/08-using-selectors/image-form.jpeg
deleted file mode 100644
index ec92da563..000000000
Binary files a/lessons/L3/concepts/08-using-selectors/image-form.jpeg and /dev/null differ
diff --git a/lessons/L3/concepts/08-using-selectors/instructions.md b/lessons/L3/concepts/08-using-selectors/instructions.md
deleted file mode 100644
index 0c3f56225..000000000
--- a/lessons/L3/concepts/08-using-selectors/instructions.md
+++ /dev/null
@@ -1,14 +0,0 @@
-## Instructions
-
-### Which HTML elements match the given CSS statement?
-
-```css
-.right {
-  text-align: right;
-}
-```
-
-- `<div class="right"></div>`
-- `<a href="#" class="leftright"></a>`
-- `<button id="right"></button>`
-- `<p class="highlight module right"></p>`
\ No newline at end of file
diff --git a/lessons/L3/concepts/08-using-selectors/using-selectors.py b/lessons/L3/concepts/08-using-selectors/using-selectors.py
deleted file mode 100644
index 1176b94bf..000000000
--- a/lessons/L3/concepts/08-using-selectors/using-selectors.py
+++ /dev/null
@@ -1,41 +0,0 @@
-class_right = widget_inputs["check1"]
-class_leftright = widget_inputs["check2"]
-id_right = widget_inputs["check3"]
-multi_class_with_right = widget_inputs["check4"]
-
-comments = []
-def commentizer(new):
-	if new not in comments:
-		comments.append(new)
-
-is_correct = False
-
-if not class_right:
-	is_correct = is_correct and False
-	commentizer("Take a look at the first one. You could try testing it out to see if it works.")
-else:
-	is_correct = True
-
-if class_leftright:
-	is_correct = is_correct and False
-	commentizer("Take a look at the second one and look at the class name being passed. Is it the same class name being selected?")
-else:
-	is_correct = is_correct and True
-
-if id_right:
-	is_correct = is_correct and False
-	commentizer("Take a look at the third one. What attribute is being passed the value `right`?")
-else:
-	is_correct = is_correct and True
-
-if not multi_class_with_right:
-	is_correct = is_correct and False
-	commentizer("Take a look at the last one. It's okay to pass multiple class names to an element.")
-else:
-	is_correct = is_correct and True
-
-if is_correct:
-	commentizer("Awesome! Understanding selectors is the biggest key to understanding CSS.")
-
-grade_result["comment"] = "\n\n".join(comments)
-grade_result["correct"] = is_correct
\ No newline at end of file
diff --git a/lessons/L3/concepts/09-using-css-references/image-form.jpeg b/lessons/L3/concepts/09-using-css-references/image-form.jpeg
deleted file mode 100644
index b440f0e15..000000000
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diff --git a/lessons/L3/concepts/09-using-css-references/instructions.md b/lessons/L3/concepts/09-using-css-references/instructions.md
deleted file mode 100644
index f679a117b..000000000
--- a/lessons/L3/concepts/09-using-css-references/instructions.md
+++ /dev/null
@@ -1,13 +0,0 @@
-## Instructions
-
-### Answer the questions below.
-
-- What CSS property is used to italicize text?
-- What CSS property is used to underline text?
-- What CSS property is used to uppercase text?
-- What CSS property is used to bold text?
-
-### CSS References
-
-- Mozilla Developer Network - [CSS Reference](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference)
-- css-tricks.com - [CSS Almanac](https://css-tricks.com/almanac/)
\ No newline at end of file
diff --git a/lessons/L3/concepts/09-using-css-references/using-css-references.py b/lessons/L3/concepts/09-using-css-references/using-css-references.py
deleted file mode 100644
index f3a7ce19a..000000000
--- a/lessons/L3/concepts/09-using-css-references/using-css-references.py
+++ /dev/null
@@ -1,97 +0,0 @@
-import re
-
-italicize = widget_inputs["text1"].strip()
-underline = widget_inputs["text2"].strip()
-uppercase = widget_inputs["text3"].strip()
-bold = widget_inputs["text4"].strip()
-
-comments = []
-congrats = ""
-def commentizer(new):
-	if new not in comments:
-		comments.append(new)
-
-is_correct = False
-
-def run_through_problems():
-	# check if student has answered all question
-	if not (italicize and underline and uppercase and bold):
-		commentizer("At least one of the questions is missing an answer. Make sure to answer each question.")
-		return False
-
-	# check first question
-	if re.match("font-stlye|font-sltye|font-styel|font-stle", italicize):
-		commentizer("Take a look at number one. Did you misspell style?")
-		return False
-
-	if not re.match("^font-style$", italicize):
-		commentizer("Take another look at number one. There's a property that starts with `font` that you might want to check out.")
-
-	if re.match("<i>|<\/i>|^i$", italicize):
-		commentizer("You can use `<i>`, but I'm looking for the **CSS property** used to italicize text.")
-		return False
-
-	if re.match("<em>|<\/em>|^em$", italicize):
-		commentizer("You can use `<em>`, but I'm looking for the **CSS property** used to italicize text.")
-		return False
-
-	if re.match("^font-.*$", italicize) and not re.match("^font-style$", italicize):
-		commentizer("Are you sure that's the right `font` property?")
-		return False
-
-	# check second question
-	if re.match("text-deceration|text-decotaion|text-decoraton|text-decoratin|text-decarttion|text-decorate", underline):
-		commentizer("Take a look at number two. Did you misspell decoration?")
-		return False
-
-	if not re.match("^text-decoration$", underline):
-		commentizer("Take another look at number two. Hint: Try Googling the question.")
-
-	if re.match("^text-.*$", underline) and not re.match("^text-decoration$", underline):
-		commentizer("Are you sure that's the right `text` property?")
-		return False
-
-	# check third question
-	if re.match("text-transfrm|text-tarnsform|txt-transform|txt-tarnsform|txt-transfrm", uppercase):
-		commentizer("Take a look at number three. Did you misspell transform?")
-		return False
-
-	if not re.match("^text-transform$", uppercase):
-		commentizer("Take another look at number three. Have you tried searching MDN's CSS Reference or css-tricks.com's CSS Almanac?")
-
-	if re.match("^text-.*$", uppercase) and not re.match("^text-transform$", uppercase):
-		commentizer("Are you sure that's the right `text` property?")
-		return False
-
-	# check fourth question
-	if re.match("font-wieght|font-wait|font-weght|font-wight", bold):
-		commentizer("Take a look at number four. Did you misspell weight?")
-		return False
-
-	if not re.match("^font-weight$", bold):
-		commentizer("Take another look at number four. There's a CSS property you can use to bold text.")
-
-	if re.match("<b>|<\/b>|^b$", bold):
-		commentizer("You can use `<b>`, but I'm looking for the **CSS property** used to bold text.")
-		return False
-
-	if re.match("<strong>|<\/strong>|^strong$", bold):
-		commentizer("You can use `<strong>`, but I'm looking for the **CSS property** used to bold text.")
-		return False
-
-	if re.match("^font-.*$", bold) and not re.match("^font-weight$", bold):
-		commentizer("Are you sure that's the right `font` property?")
-		return False
-	return False
-
-if (re.match("^font-style$", italicize) and re.match("^text-decoration$", underline) and re.match("^text-transform$", uppercase) and re.match("^font-weight$", bold)):
-	congrats = "Looks good! Remember to use CSS references when you need help or get stuck."
-	is_correct = True
-else:
-	run_through_problems()
-
-if is_correct:
-	commentizer(congrats)
-
-grade_result["comment"] = "\n\n".join(comments)
-grade_result["correct"] = is_correct
\ No newline at end of file
diff --git a/lessons/L3/concepts/11-using-developer-tools/image-form.jpeg b/lessons/L3/concepts/11-using-developer-tools/image-form.jpeg
deleted file mode 100644
index 570cdab68..000000000
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diff --git a/lessons/L3/concepts/11-using-developer-tools/instructions.md b/lessons/L3/concepts/11-using-developer-tools/instructions.md
deleted file mode 100644
index eddb49610..000000000
--- a/lessons/L3/concepts/11-using-developer-tools/instructions.md
+++ /dev/null
@@ -1,7 +0,0 @@
-## Instructions
-
-### Answer the questions below.
-
-- What HTML tags are used to build the content on the page?
-- Are the names of id and class attributes descriptive?
-- Does the website use tag, id, or class selectors to style their elements?
\ No newline at end of file
diff --git a/lessons/L3/concepts/12-developer-tools-on-different-browsers/chrome-menu.png b/lessons/L3/concepts/12-developer-tools-on-different-browsers/chrome-menu.png
deleted file mode 100644
index 6eca30d51..000000000
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diff --git a/lessons/L3/concepts/12-developer-tools-on-different-browsers/mind-blown-meme.jpg b/lessons/L3/concepts/12-developer-tools-on-different-browsers/mind-blown-meme.jpg
deleted file mode 100644
index edea62546..000000000
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diff --git a/lessons/L3/concepts/12-developer-tools-on-different-browsers/mozilla-menu.png b/lessons/L3/concepts/12-developer-tools-on-different-browsers/mozilla-menu.png
deleted file mode 100644
index 181746b4b..000000000
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diff --git a/lessons/L3/concepts/12-developer-tools-on-different-browsers/notes.md b/lessons/L3/concepts/12-developer-tools-on-different-browsers/notes.md
deleted file mode 100644
index e86e208d2..000000000
--- a/lessons/L3/concepts/12-developer-tools-on-different-browsers/notes.md
+++ /dev/null
@@ -1,46 +0,0 @@
-## Developer Tools on Different Browsers
-
-Did you know, every modern web browser includes its own set of developer tools?
-
-![mind blown](http://udacity.github.io/fend/lessons/L3/concepts/12-developer-tools-on-different-browsers/mind-blown-meme.jpg)
-
-If you didn't, that's okay. Developer tools aren't always the easiest thing to find in your browser. So, we've decided to help you out by creating this guide to developer tools!
-
-### Google Chrome
-
-The Chrome DevTools are a set of web authoring and debugging tools built into Google Chrome. Use the DevTools to iterate, debug and profile your site. To learn more, [click here](https://developers.google.com/web/tools/chrome-devtools/).
-
-To open Chrome DevTools, either right-click on any page element and select `Inspect` or open the Chrome menu ![chrome menu](http://udacity.github.io/fend/lessons/L3/concepts/12-developer-tools-on-different-browsers/chrome-menu.png) in the top-right corner of your browser window and select `More Tools > Developer Tools`. Alternatively, you can use the shortcut `⌘ + ⌥ + I` (Mac) or `Ctrl + ⇧ + I` (Windows/Linux).
-
-### Mozilla Firefox
-
-Firefox Developer Tools allow you to examine, edit, and debug HTML, CSS, and JavaScript on the desktop and on mobile. Also, you can download a version of of Firefox called Firefox Developer Edition that is tailored for developers, featuring the latest Firefox features and experimental developer tools. To learn more, [click here](https://developer.mozilla.org/en-US/docs/Tools).
-
-To open Firefox Developer Tools, either right-click on any page element and select `Inspect Element` or open the Firefox menu ![firefox menu](http://udacity.github.io/fend/lessons/L3/concepts/12-developer-tools-on-different-browsers/mozilla-menu.png) in the top-right corner of your browser window and select `Developer`. Alternatively, you can use the shortcut `⌘ + ⌥ + I` (Mac) or `Ctrl + ⇧ + I` (Windows/Linux).
-
-### Internet Explorer
-
-For any Windows users, if you're still using a version of Internet Explorer, then you can access F12 developer tools by simply pressing `F12`. The features vary between versions, but starting at Internet Explorer 8 remain pretty consistent. Below, we've linked to documentation for each version, but if you've upgraded to Microsoft Edge, then check the next section.
-
-- [Internet Explorer 8](https://msdn.microsoft.com/en-us/library/dd565628.aspx)
-- [Internet Explorer 9](https://msdn.microsoft.com/en-us/library/gg589512.aspx)
-- [Internet Explorer 10](https://msdn.microsoft.com/en-us/library/hh673549.aspx)
-- [Internet Explorer 11](https://msdn.microsoft.com/en-us/library/bg182636.aspx)
-
-### Microsoft Edge
-
-Microsoft Edge introduces great new improvements to the F12 developer tools seen in Internet Explorer. The new tools are built in TypeScript, and are always running, so no reloads are required. In addition, F12 developer tools documentation is now fully available on [GitHub](https://github.com/MicrosoftEdge/MicrosoftEdge-Documentation). To learn more, [click here](https://dev.windows.com/en-us/microsoft-edge/platform/documentation/f12-devtools-guide/).
-
-Just like Internet Explorer, to open developer tools in Microsoft Edge simply press `F12`.
-
-### Safari
-
-For any Mac users, Safari includes Web Inspector, a powerful tool that makes it easy to modify, debug, and optimize a website for peak performance and compatibility on both platforms. To learn more, [click here](https://developer.apple.com/safari/tools/).
-
-To access Safari's Web Development Tools, enable the Develop menu in Safari’s Advanced preferences. Once enabled, you can right-click on any page element and select `Inspect Element` to open Web Development Tools or use the shortcut `⌘ + ⌥ + I`.
-
-### Opera
-
-Fast, lean and powerful, Opera comes prepacked with a fully-featured suite of developer tools. Named Opera Dragonfly, it is designed to make your job easier. To learn more, [click here](http://www.opera.com/dragonfly/).
-
-Launch Opera Dragonfly by pressing `⌘ + ⌥ + I` (Mac) or `Ctrl + ⇧ + I` (Windows/Linux). Alternatively, you can target a specific element by right-clicking in the page and selecting `Inspect Element`.
\ No newline at end of file
diff --git a/lessons/L3/concepts/13-css-units/car.png b/lessons/L3/concepts/13-css-units/car.png
deleted file mode 100644
index 88a9d395e..000000000
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diff --git a/lessons/L3/concepts/13-css-units/notes.md b/lessons/L3/concepts/13-css-units/notes.md
deleted file mode 100644
index 2025e7d2e..000000000
--- a/lessons/L3/concepts/13-css-units/notes.md
+++ /dev/null
@@ -1,11 +0,0 @@
-### CSS Units
-
-- Mozilla Developer Network - [CSS Length](https://developer.mozilla.org/en-US/docs/Web/CSS/length)
-- css-tricks.com - [The Length of CSS](https://css-tricks.com/the-lengths-of-css/)
-
----
-
-### Image Credits
-
-- 'Karakoram Highway' by [Marc van der Chijs](https://www.flickr.com/photos/chijs/) via Flickr, Creative Commons.
-- 'Silhouette of Car with Driver' by [Inkwina](https://commons.wikimedia.org/wiki/User:Inkwina) via Wikipedia, Creative Commons.
\ No newline at end of file
diff --git a/lessons/L3/concepts/13-css-units/road.jpg b/lessons/L3/concepts/13-css-units/road.jpg
deleted file mode 100644
index 5462f8a3b..000000000
Binary files a/lessons/L3/concepts/13-css-units/road.jpg and /dev/null differ
diff --git a/lessons/L3/concepts/14-units-in-css/answer.html b/lessons/L3/concepts/14-units-in-css/answer.html
deleted file mode 100644
index 6153adc09..000000000
--- a/lessons/L3/concepts/14-units-in-css/answer.html
+++ /dev/null
@@ -1,42 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Add the following changes to this webpage:
-
-* set the first div's width to 100px (pixels)
-* set the second div's height to 200px (pixels)
-* set the third div's margin to 1em
-* set the fourth div's font-size to 2em
-
--->
-
-<html>
-<head>
-    <title>Quiz - Units in CSS</title>
-    <style>
-    	.first {
-            width: 100px;
-    	}
-    	.second {
-            height: 200px;
-    	}
-    	.third {
-            margin: 1em;
-    	}
-    	.fourth {
-            font-size: 2em;
-    	}
-        /* extra css */
-        div { height: 100px;}
-        .first      { background-color: #ffc; }
-        .second     { background-color: #fcf; }
-        .third      { background-color: #cff; }
-        .fourth     { background-color: #cfc; }
-    </style>
-</head>
-<body>
-	<div class="first"></div>
-	<div class="second"></div>
-	<div class="third">Hammock ex plaid nulla. Nihil stumptown gastropub, dreamcatcher gochujang franzen cillum cliche keffiyeh pop-up pug small batch knausgaard. Fanny pack elit you probably haven't heard of them before they sold out. Sint elit tofu et veniam irony 3 wolf moon. VHS slow-carb trust fund chartreuse wolf. Qui sed dreamcatcher cronut, hoodie fixie normcore. Gochujang dolor consectetur post-ironic.</div>
-	<div class="fourth">Hammock ex plaid nulla. Nihil stumptown gastropub, dreamcatcher gochujang franzen cillum cliche keffiyeh pop-up pug small batch knausgaard. Fanny pack elit you probably haven't heard of them before they sold out. Sint elit tofu et veniam irony 3 wolf moon. VHS slow-carb trust fund chartreuse wolf. Qui sed dreamcatcher cronut, hoodie fixie normcore. Gochujang dolor consectetur post-ironic.</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/concepts/14-units-in-css/instructions.md b/lessons/L3/concepts/14-units-in-css/instructions.md
deleted file mode 100644
index 2e423d507..000000000
--- a/lessons/L3/concepts/14-units-in-css/instructions.md
+++ /dev/null
@@ -1,8 +0,0 @@
-## Instructions
-
-### Add the following changes to this webpage:
-
-* set the first div's `width` to `100px` (pixels)
-* set the second div's `height` to `200px` (pixels)
-* set the third div's `margin` to `1em`
-* set the fourth div's `font-size` to `2em`
\ No newline at end of file
diff --git a/lessons/L3/concepts/14-units-in-css/question.html b/lessons/L3/concepts/14-units-in-css/question.html
deleted file mode 100644
index fdfbcee6d..000000000
--- a/lessons/L3/concepts/14-units-in-css/question.html
+++ /dev/null
@@ -1,42 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Add the following changes to this webpage:
-
-* set the first div's width to 100px (pixels)
-* set the second div's height to 200px (pixels)
-* set the third div's margin to 1em
-* set the fourth div's font-size to 2em
-
--->
-
-<html>
-<head>
-    <title>Quiz - Units in CSS</title>
-    <style>
-    	.first {
-            /* add CSS here */
-    	}
-    	.second {
-            /* add CSS here */
-    	}
-    	.third {
-            /* add CSS here */
-    	}
-    	.fourth {
-            /* add CSS here */
-    	}
-        /* extra css */
-        div { height: 100px;}
-        .first      { background-color: #ffc; }
-        .second     { background-color: #fcf; }
-        .third      { background-color: #cff; }
-        .fourth     { background-color: #cfc; }
-    </style>
-</head>
-<body>
-	<div class="first"></div>
-	<div class="second"></div>
-	<div class="third">Hammock ex plaid nulla. Nihil stumptown gastropub, dreamcatcher gochujang franzen cillum cliche keffiyeh pop-up pug small batch knausgaard. Fanny pack elit you probably haven't heard of them before they sold out. Sint elit tofu et veniam irony 3 wolf moon. VHS slow-carb trust fund chartreuse wolf. Qui sed dreamcatcher cronut, hoodie fixie normcore. Gochujang dolor consectetur post-ironic.</div>
-	<div class="fourth">Hammock ex plaid nulla. Nihil stumptown gastropub, dreamcatcher gochujang franzen cillum cliche keffiyeh pop-up pug small batch knausgaard. Fanny pack elit you probably haven't heard of them before they sold out. Sint elit tofu et veniam irony 3 wolf moon. VHS slow-carb trust fund chartreuse wolf. Qui sed dreamcatcher cronut, hoodie fixie normcore. Gochujang dolor consectetur post-ironic.</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/concepts/14-units-in-css/tests.js b/lessons/L3/concepts/14-units-in-css/tests.js
deleted file mode 100644
index ea708fae8..000000000
--- a/lessons/L3/concepts/14-units-in-css/tests.js
+++ /dev/null
@@ -1,654 +0,0 @@
-function performTesting() { return {result: 'noop'}; };
-var Grader = (function() {
-
-  // http://stackoverflow.com/questions/1068834/object-comparison-in-javascript?lq=1
-  function deepCompare () {
-    var i, l, leftChain, rightChain;
-
-    function compare2Objects (x, y) {
-      var p;
-
-      // remember that NaN === NaN returns false
-      // and isNaN(undefined) returns true
-      if (isNaN(x) && isNaN(y) && typeof x === 'number' && typeof y === 'number') {
-        return true;
-      }
-
-      // Compare primitives and functions.
-      // Check if both arguments link to the same object.
-      // Especially useful on step when comparing prototypes
-      if (x === y) {
-        return true;
-      }
-
-      // Works in case when functions are created in constructor.
-      // Comparing dates is a common scenario. Another built-ins?
-      // We can even handle functions passed across iframes
-      if ((typeof x === 'function' && typeof y === 'function') ||
-        (x instanceof Date && y instanceof Date) ||
-        (x instanceof RegExp && y instanceof RegExp) ||
-        (x instanceof String && y instanceof String) ||
-        (x instanceof Number && y instanceof Number)) {
-          return x.toString() === y.toString();
-      }
-
-      // At last checking prototypes as good a we can
-      if (!(x instanceof Object && y instanceof Object)) {
-        return false;
-      }
-
-      if (x.isPrototypeOf(y) || y.isPrototypeOf(x)) {
-        return false;
-      }
-
-      if (x.constructor !== y.constructor) {
-        return false;
-      }
-
-      if (x.prototype !== y.prototype) {
-        return false;
-      }
-
-      // Check for infinitive linking loops
-      if (leftChain.indexOf(x) > -1 || rightChain.indexOf(y) > -1) {
-         return false;
-      }
-
-      // Quick checking of one object beeing a subset of another.
-      // todo: cache the structure of arguments[0] for performance
-      for (p in y) {
-        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {
-          return false;
-        }
-        else if (typeof y[p] !== typeof x[p]) {
-          return false;
-        }
-      }
-
-      for (p in x) {
-        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {
-          return false;
-        }
-        else if (typeof y[p] !== typeof x[p]) {
-          return false;
-        }
-
-        switch (typeof (x[p])) {
-          case 'object':
-          case 'function':
-            leftChain.push(x);
-            rightChain.push(y);
-
-            if (!compare2Objects (x[p], y[p])) {
-              return false;
-            }
-
-            leftChain.pop();
-            rightChain.pop();
-            break;
-
-          default:
-            if (x[p] !== y[p]) {
-              return false;
-            }
-            break;
-        }
-      }
-
-      return true;
-    }
-
-    if (arguments.length < 1) {
-      return true; //Die silently? Don't know how to handle such case, please help...
-      // throw "Need two or more arguments to compare";
-    }
-
-    for (i = 1, l = arguments.length; i < l; i++) {
-
-      leftChain = []; //Todo: this can be cached
-      rightChain = [];
-
-      if (!compare2Objects(arguments[0], arguments[i])) {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  function Queue (grader) {
-    this.grader = grader;
-    this.gradingSteps = [];
-    this.flushing = false;
-    this.alwaysGo = false;
-  };
-
-  Queue.prototype = {
-    add: function(callback, messages, keepGoing) {
-      if (keepGoing !== false) {
-        keepGoing = true;
-      }
-
-      if (!callback) {
-        throw new Error("Every test added to the queue must have a valid function.");
-      }
-
-      this.gradingSteps.push({
-        callback: callback,
-        isCorrect: false,
-        wrongMessage: messages.wrongMessage || null,
-        comment: messages.comment || null,
-        category: messages.category || null,
-        keepGoing: keepGoing
-      });
-    },
-
-    _flush: function() {
-      if (!this.flushing) {
-        this.flushing = true;
-      }
-      this.step();
-    },
-
-    clear: function() {
-      this.flushing = false;
-      this.gradingSteps = [];
-      this.grader.endTests();
-    },
-
-    step: function() {
-      var self = this;
-      if (this.gradingSteps.length === 0) {
-        this.clear();
-      }
-
-      function executeInPromise (fn) {
-        return new Promise(function(resolve, reject) {
-          if (fn) {
-            try {
-              var result = fn();
-            } catch (e) {
-              self.clear();
-              console.log(e);
-            }
-          }
-          resolve(result);
-        });
-      };
-
-      function takeNextStep (test, result) {
-        test.isCorrect = result;
-
-        self.registerResults(test);
-
-        if (test.isCorrect || test.keepGoing || self.alwaysGo) {
-          self.step();
-        } else {
-          self.clear();
-        }
-      };
-
-      if (this.flushing) {
-        var test = this.gradingSteps.shift();
-
-        if (this.grader.async) {
-          executeInPromise(test.callback).then(function(resolve) {
-            takeNextStep(test, resolve);
-          });
-        } else if (!this.grader.async) {
-          try {
-            var result = test.callback();
-          } catch (e) {
-            console.log(e);
-            throw new Error();
-          }
-          takeNextStep(test, result);
-        }
-
-      }
-    },
-
-    registerResults: function(test) {
-      this.grader.registerResults(test);
-    }
-  };
-
-  function Grader (type, categoryMessages) {
-    var self = this;
-    this.specificFeedback = [];
-    this.comments = [];
-    this.isCorrect = false;
-    this.correctHasChanged = false;
-    this.queue = new Queue(self);
-    this.async = false;
-    this.categoryMessages = null;
-    this.generalFeedback = [];
-    this.onresult = function() {};
-
-    for (n in arguments) {
-      switch (typeof arguments[n]) {
-        case 'string':
-          if (arguments[n] === 'async') {
-            this.async = true;
-          } else if (arguments[n] === 'sync') {
-            this.async = false;
-          } else {
-            throw new Error("Invalid type argument in Grader constructor");
-          }
-          break;
-        case 'object':
-          this.categoryMessages = arguments[n];
-          break;
-        default:
-          throw new TypeError("Invalid argument in Grader constructor");
-          break;
-      }
-    }
-  };
-
-  Object.defineProperties(Grader.prototype, {
-    // sometimes used instead of isCorrect
-    is_correct: {
-      get: function() {
-        return this.isCorrect;
-      }
-    }
-  });
-
-  Grader.prototype = {
-    addTest: function(callback, messages, keepGoing) {
-      this.queue.add(callback, messages, keepGoing);
-    },
-
-    runTests: function(options) {
-      if (options) {
-        this.queue.alwaysGo = options.ignoreCheckpoints || false;
-      }
-      this.queue._flush();
-    },
-
-    endTests: function() {
-      if (this.queue.flushing) {
-        this.queue.clear();
-      } else {
-        var results = this.gatherResults();
-        this.onresult(results);
-      }
-    },
-
-    registerResults: function(test) {
-      this.generateSpecificFeedback(test);
-      this.generateGeneralFeedback(test);
-      this.setCorrect(test);
-    },
-
-    generateSpecificFeedback: function(test) {
-      if (!test.isCorrect && test.wrongMessage) {
-        this.addSpecificFeedback(test.wrongMessage);
-      } else if (test.isCorrect && test.comment) {
-        this.addComment(test.comment)
-      }
-    },
-
-    generateGeneralFeedback: function(test) {
-      if (!test.isCorrect && test.category) {
-        if (this.generalFeedback.indexOf(this.categoryMessages[test.category]) === -1) {
-          this.generalFeedback.push(this.categoryMessages[test.category]);
-        }
-      }
-    },
-
-    setCorrect: function(test) {
-      if (this.correctHasChanged) {
-        this.isCorrect = this.isCorrect && test.isCorrect;
-      } else {
-        this.correctHasChanged = true;
-        this.isCorrect = test.isCorrect;
-      }
-    },
-
-    addSpecificFeedback: function(feedback) {
-      this.specificFeedback.push(feedback);
-    },
-
-    addComment: function(feedback) {
-      this.comments.push(feedback);
-    },
-
-    gatherResults: function() {
-      var self = this;
-      return {
-        isCorrect: self.isCorrect,
-        testFeedback: self.specificFeedback.concat(self.generalFeedback),
-        testComments: self.comments
-      }
-    },
-
-    getFormattedWrongMessages: function(separator) {
-      var allMessages, message;
-
-      allMessages = this.specificFeedback.concat(this.generalFeedback);
-      message = allMessages.join(separator);
-
-      return message;
-    },
-
-    getFormattedComments: function(separator) {
-      return this.comments.join(separator);
-    },
-
-    isType: function(value, expectedType) {
-      var isCorrect = false;
-
-      if (typeof value !== expectedType) {
-
-        if (typeof value === 'function') {
-          value = value.name;
-        };
-
-        isCorrect = false;
-      } else if (typeof value === expectedType){
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isInstance: function(value, expectedInstance) {
-      var isCorrect = false;
-
-      if (value instanceof expectedInstance !== true) {
-
-        isCorrect = false;
-      } else if (value instanceof expectedInstance === true){
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isValue: function(value1, value2) {
-      var isCorrect = false;
-
-      if (!deepCompare(value1, value2)) {
-        isCorrect = false;
-      } else if (deepCompare(value1, value2)) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isInRange: function(value, lower, upper) {
-      var isCorrect = false;
-
-      if (typeof value !== 'number' || isNaN(value)) {
-        isCorrect = false
-      } else if (value > upper || value < lower) {
-        isCorrect = false;
-
-      } else if (value < upper || value > lower) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isSet: function(value) {
-      var isCorrect = false;
-
-      if (value === undefined) {
-        isCorrect = false;
-
-      } else {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isjQuery: function(elem) {
-      // could use obj.jquery, which will only return true if it is a jquery object
-      var isjQ = false;
-      if (elem instanceof $) {
-        isjQ = true;
-      }
-      return isjQ;
-    },
-
-    hasCorrectTag: function(elem, tag) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasTag = false;
-      if (elem.is(tag)) {
-        hasTag = true;
-      }
-      return hasTag;
-    },
-
-    hasCorrectClass: function(elem, className) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasClass = false;
-      if (elem.hasClass(className)) {
-        hasClass = true;
-      }
-      return hasClass;
-    },
-
-    hasCorrectId: function(elem, id) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.is('#' + id)) return true;
-      return false;
-    },
-
-    hasCorrectText: function(elem, text) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasText = false;
-      var re = new RegExp(text);
-      if (elem.text().match(re)) {
-        hasText = true;
-      }
-      return hasText;
-    },
-
-    hasAttr: function(elem, attrName, correctAttr) {
-      var isCorrect = false;
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (correctAttr && elem.attr(attrName) === correctAttr) {
-        isCorrect = true;
-      } else if (!correctAttr && elem.attr(attrName)) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    hasCorrectLength: function(elems, _length) {
-      if (!this.isjQuery(elems)) {
-        elems = $(elems);
-      }
-      var correctLength = false;
-      var cLength = elems.length;
-      if (cLength === _length) {
-        correctLength = true;
-      }
-      return correctLength;
-    },
-
-    isCorrectElem: function(elem, correctElem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.is(correctElem)) {
-        is = true;
-      }
-      return is;
-    },
-
-    isCorrectCollection: function(collection, correctCollection) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (collection.is(correctCollection)) {
-        is = true;
-      }
-      return is;
-    },
-
-    hasCorrectStyle: function(elem, cssProperty, _correctStyle) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasCorrectStyle = false;
-      /* if one style is passed, convert to array */
-      if (typeof _correctStyle === 'string') {
-        _correctStyle = [_correctStyle];
-      }
-      var currentStyle = elem.css(cssProperty);
-      for (var i = 0; i < _correctStyle.length; i++) {
-          if (currentStyle === _correctStyle[i]) {
-            hasCorrectStyle = true;
-          }
-       }
-      return hasCorrectStyle;
-    },
-
-    propertyIsLessThan : function (elem, cssProperty, value) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.css(cssProperty) < value) {
-        is = true;
-      }
-      return is;
-    },
-
-    propertyIsGreaterThan : function (elem, cssProperty, value) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.css(cssProperty) > value) {
-        is = true;
-      }
-      return is;
-    },
-
-    doesExistInParent: function (elem, parentElem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (!this.isjQuery(parentElem)) {
-        parentElem = $(parentElem);
-      }
-      var inParent = false;
-      if (parentElem.find(elem).length > 0) {
-        inParent = true;
-      }
-      return inParent;
-    },
-
-    elemDoesExist: function(elem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var exists = false;
-      if (elem.length > 0) {
-        exists = true;
-      }
-      return exists;
-    },
-
-    areSiblings: function(elem1, elem2) {
-      if (!this.isjQuery(elem1)) {
-        elem1 = $(elem1);
-      }
-      if (!this.isjQuery(elem2)) {
-        elem2 = $(elem2);
-      }
-      var siblingLove = false;
-      if (elem1.siblings(elem2).length > 0) {
-        siblingLove = true;
-      }
-      return siblingLove;
-    },
-
-    isImmediateChild: function(elem, parentElem) {
-      var isCorrect = false;
-      if (this.isjQuery(elem)) {
-        throw new Error("elem needs to be a string for Grader.isImmediateChild()");
-      }
-      if (!this.isjQuery(parentElem)) {
-        parentElem = $(parentElem);
-      }
-      if (parentElem.children(elem).length > 0) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    hasParent: function(elem, parentElem) {
-      var isCorrect = false;
-      if (this.isjQuery(parentElem)) {
-        throw new Error("parentElem needs to be a string for Grader.hasParent()");
-      }
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.closest(parentElem).length > 0) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    sendResultsToExecutor: function(o) {
-      var output = JSON.stringify(o);
-      console.info("UDACITY_RESULT:" + output);
-    }
-  }
-  return Grader;
-})();
-function performSubmission() {
-  var grader = new Grader({
-    // can add shared messages here
-  });
-
-  grader.addTest(function() {
-    return grader.hasCorrectStyle($('.first'), 'width', '100px');
-  }, {
-    wrongMessage: "The width of the first div should be 100px. Are you using the right property?"
-  });
-
-  grader.addTest(function() {
-    return grader.hasCorrectStyle($('.second'), 'height', '200px');
-  }, {
-    wrongMessage: "The height of the second div is supposed to be 200px. Make sure you don't add space between the number value and unit of measurement."
-  });
-
-  grader.addTest(function() {
-    return (grader.hasCorrectStyle($('.third'), 'margin-top', '16px') && grader.hasCorrectStyle($('.third'), 'margin-bottom', '16px') && grader.hasCorrectStyle($('.third'), 'margin-left', '16px') && grader.hasCorrectStyle($('.third'), 'margin-right', '16px'));
-  }, {
-    wrongMessage: "Set the margin of the third div to 1em. If done correctly, you will see white space around the third div."
-  });
-
-  grader.addTest(function() {
-    return grader.hasCorrectStyle($('.fourth'), 'font-size', '32px');
-  }, {
-    wrongMessage: "The font-size of the text in the fourth div should be 2em or double its normal size."
-  });
-
-  grader.runTests();
-
-  result = {
-    is_correct: grader.isCorrect,
-    test_feedback: grader.getFormattedWrongMessages('\n'),
-    test_comments: grader.getFormattedComments('\n'),
-    congrats: "Goob job! Getting comfortable with units is necessary for creating stylized websites."
-  };
-  return result;
-};
\ No newline at end of file
diff --git a/lessons/L3/concepts/15-css-colors/color-1-bw.jpg b/lessons/L3/concepts/15-css-colors/color-1-bw.jpg
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diff --git a/lessons/L3/concepts/15-css-colors/css-colors-browser-1.png b/lessons/L3/concepts/15-css-colors/css-colors-browser-1.png
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diff --git a/lessons/L3/concepts/15-css-colors/css-colors-browser-2.png b/lessons/L3/concepts/15-css-colors/css-colors-browser-2.png
deleted file mode 100644
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diff --git a/lessons/L3/concepts/15-css-colors/notes.md b/lessons/L3/concepts/15-css-colors/notes.md
deleted file mode 100644
index 9ca95463f..000000000
--- a/lessons/L3/concepts/15-css-colors/notes.md
+++ /dev/null
@@ -1,11 +0,0 @@
-### How Hexadecimal Works
-
-- [The Hexadecimal Numeral System](https://en.wikipedia.org/wiki/Hexadecimal)
-- [Hex to RGB Convertor](http://hex.colorrrs.com/)
-
----
-
-### Image Credits
-
-- Photos by [Markus Spiske](http://www.raumrot.com) via Raumrot, Creative Commons.
-- 'A powerful light shining in the dark' by [Zouavman Le Zouave](https://commons.wikimedia.org/wiki/User:Zouavman_Le_Zouave) via Wikipedia, Creative Commons.
\ No newline at end of file
diff --git a/lessons/L3/concepts/16-identifying-colors/identifying-colors.py b/lessons/L3/concepts/16-identifying-colors/identifying-colors.py
deleted file mode 100644
index 153d22152..000000000
--- a/lessons/L3/concepts/16-identifying-colors/identifying-colors.py
+++ /dev/null
@@ -1,48 +0,0 @@
-first = widget_inputs["check1"]
-second = widget_inputs["check2"]
-third = widget_inputs["check3"]
-fourth = widget_inputs["check4"]
-fifth = widget_inputs["check5"]
-
-comments = []
-def commentizer(new):
-    if new not in comments:
-        comments.append(new)
-
-is_correct = False
-
-if first:
-    is_correct = is_correct and False
-    commentizer("Are you sure about the first one? Think about which digits correspond to red, green, and blue (RGB).")
-else:
-    is_correct = True
-
-if not second:
-    is_correct = is_correct and False
-    commentizer("Take a look at the second one again. Do you remember using this in a previous exercise?")
-else:
-    is_correct = is_correct and True
-
-if not third:
-    is_correct = is_correct and False
-    commentizer("Take another look at the third one. When using RGB, `0` means no presence of the color and `255` means full presence of the color.")
-else:
-    is_correct = is_correct and True
-
-if fourth:
-    is_correct = is_correct and False
-    commentizer("Give the fourth one another peek. What color do you get if you use `#ffff00` in a color picker?")
-else:
-    is_correct = is_correct and True
-
-if not fifth:
-    is_correct = is_correct and False
-    commentizer("Look at the last one. Is it possible to use shorthand when writing CSS?")
-else:
-    is_correct = is_correct and True
-
-if is_correct:
-    commentizer("Right on! To quickly identify a color's rgb/hex value, try using the color picker in developer tools.")
-
-grade_result["comment"] = "\n\n".join(comments)
-grade_result["correct"] = is_correct
\ No newline at end of file
diff --git a/lessons/L3/concepts/16-identifying-colors/image-form.jpeg b/lessons/L3/concepts/16-identifying-colors/image-form.jpeg
deleted file mode 100644
index 0f672ae30..000000000
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diff --git a/lessons/L3/concepts/16-identifying-colors/instructions.md b/lessons/L3/concepts/16-identifying-colors/instructions.md
deleted file mode 100644
index 2e7750558..000000000
--- a/lessons/L3/concepts/16-identifying-colors/instructions.md
+++ /dev/null
@@ -1,14 +0,0 @@
-## Instructions
-
-### Which CSS declarations can be used to represent the standard color for blue?
-
-- `color: #ff0000;`
-- `color: blue;`
-- `color: rgb(0, 0, 255);`
-- `color: #ffff00;`
-- `color: #00f;`
-
-### References
-
-- [Named Colors and Hex Equivalents](https://css-tricks.com/snippets/css/named-colors-and-hex-equivalents/)
-- [Shorthand Properties](https://developer.mozilla.org/en-US/docs/Web/CSS/Shorthand_properties)
\ No newline at end of file
diff --git a/lessons/L3/keynotes/lesson3.key b/lessons/L3/keynotes/lesson3.key
deleted file mode 100644
index 55570ef16..000000000
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diff --git a/lessons/L3/problem-set/01-welcome-to-the-problem-set/notes.md b/lessons/L3/problem-set/01-welcome-to-the-problem-set/notes.md
deleted file mode 100644
index 004187640..000000000
--- a/lessons/L3/problem-set/01-welcome-to-the-problem-set/notes.md
+++ /dev/null
@@ -1,10 +0,0 @@
-### Welcome to the CSS syntax problem set!
-
-The purpose of this problem set is to get you familiar with the CSS syntax and practice using different CSS properties. As you go through each exercise, recall the things you learned in the previous lesson. If you get stuck, remember that you can use references and developer tools to help you out.
-
-After you've completed the problem set, you should feel more confident when adding style to your webpages and you'll be ready to learn new techniques to improve your front-end web development process.
-
-### CSS References
-
-- Mozilla Developer Network - [CSS Reference](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference)
-- css-tricks.com - [CSS Almanac](https://css-tricks.com/almanac/)
\ No newline at end of file
diff --git a/lessons/L3/problem-set/02-style-an-image/answer.html b/lessons/L3/problem-set/02-style-an-image/answer.html
deleted file mode 100644
index 56e17972a..000000000
--- a/lessons/L3/problem-set/02-style-an-image/answer.html
+++ /dev/null
@@ -1,30 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Replicate the same styling seen in the kitten image below. -->
-
-<!-- Hints:
-
-* the image has a border
-* the image has a shadow
-* the border color is #FA8072 (salmon)
-* the border has rounded corners
-* the cursor looks different than normal
-
--->
-
-<html>
-<head>
-    <title>Style an Image Quiz</title>
-    <style>
-    	.kitten-image {
-			border: 5px dashed salmon;
-			border-radius: 5px;
-			cursor: pointer;
-			box-shadow: 5px 5px 20px #ccc;
-    	}
-    </style>
-</head>
-<body>
-    <img src="http://udacity.github.io/fend/lessons/L3/problem-set/02-style-an-image/kitten.jpg" alt="kitten" class="kitten-image">
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/problem-set/02-style-an-image/answer.md b/lessons/L3/problem-set/02-style-an-image/answer.md
deleted file mode 100644
index 8105baecc..000000000
--- a/lessons/L3/problem-set/02-style-an-image/answer.md
+++ /dev/null
@@ -1,20 +0,0 @@
-Here's what I added to  `.kitten-image` :
-
-```css
-.kitten-image {
-  border: 5px dashed salmon;
-  border-radius: 5px;
-  cursor: pointer;
-  box-shadow: 5px 5px 20px #ccc;
-}
-```
-
-The properties `border` and `border-radius` were used to create the border seen in the image. However, you could have split the border property into `border-width`, `border-style`, and `border-color`. My solution is just using the [shorthand](https://developer.mozilla.org/en-US/docs/Web/CSS/Shorthand_properties "Shorthand CSS Properties") version instead.
-
-The `cursor` property was used to change the mouse cursor from its default setting to the pointing finger.
-
-Finally, I added the property `box-shadow` to produce the drop shadow behind the image.
-
-Here's the before and after:
-
-![kitten solution](http://udacity.github.io/fend/lessons/L3/problem-set/02-style-an-image/solution.gif)
\ No newline at end of file
diff --git a/lessons/L3/problem-set/02-style-an-image/border-styles.jpg b/lessons/L3/problem-set/02-style-an-image/border-styles.jpg
deleted file mode 100644
index 3c367f8de..000000000
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diff --git a/lessons/L3/problem-set/02-style-an-image/borders.html b/lessons/L3/problem-set/02-style-an-image/borders.html
deleted file mode 100644
index d6625db9d..000000000
--- a/lessons/L3/problem-set/02-style-an-image/borders.html
+++ /dev/null
@@ -1,33 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="UTF-8">
-	<title>Borders</title>
-	<style>
-		div { width: 100px; height: 100px; margin: 5px; display: block; float: left; text-align: center; line-height: 100px; }
-		.one { border: 3px; border-style: none; }
-		.two { border: 3px; border-style: solid; }
-		.three { border: 3px; border-style: dashed; }
-		.four { border: 3px; border-style: dotted; }
-		.five { border: 3px; border-style: double; }
-		.six { border: 3px; border-style: groove; }
-		.seven { border: 3px; border-style: ridge; }
-		.eight { border: 3px; border-style: inset; }
-		.nine { border: 3px; border-style: outset; }
-		.ten { border: 3px; border-style: hidden; }
-		.six { clear: both; }
-	</style>
-</head>
-<body>
-	<div class="one">none</div>
-	<div class="two">solid</div>
-	<div class="three">dashed</div>
-	<div class="four">dotted</div>
-	<div class="five">double</div>
-	<div class="six">groove</div>
-	<div class="seven">ridge</div>
-	<div class="eight">inset</div>
-	<div class="nine">outset</div>
-	<div class="ten">hidden</div>
-</body>
-</html>
diff --git a/lessons/L3/problem-set/02-style-an-image/box-shadow.jpg b/lessons/L3/problem-set/02-style-an-image/box-shadow.jpg
deleted file mode 100644
index 79abd2c1d..000000000
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diff --git a/lessons/L3/problem-set/02-style-an-image/cursors.jpg b/lessons/L3/problem-set/02-style-an-image/cursors.jpg
deleted file mode 100644
index 9ec530356..000000000
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diff --git a/lessons/L3/problem-set/02-style-an-image/instructions.md b/lessons/L3/problem-set/02-style-an-image/instructions.md
deleted file mode 100644
index fbe35fde9..000000000
--- a/lessons/L3/problem-set/02-style-an-image/instructions.md
+++ /dev/null
@@ -1,17 +0,0 @@
-**Note: This quiz is having "interkitten" issues with certain browsers. For the time being, grading has been removed from this quiz. Try your best to complete the exercise and check your answer by viewing the solution.**
-
-### How to Complete this Quiz
-
-Edit `index.html` in the Udacity classroom to replicate the same styling seen in the solution image.
-
-![kitten solution](http://udacity.github.io/fend/lessons/L3/problem-set/02-style-an-image/kitten-solution-instructions.jpg)
-
-- I've already written the **selector** portion of the code, you just need to fill in the styles.
-
-```css
-.kitten-image {
-  /* add CSS here */
-}
-```
-
-Click "Skip to Quiz" when you're ready to start.
\ No newline at end of file
diff --git a/lessons/L3/problem-set/02-style-an-image/kitten-solution-instructions.jpg b/lessons/L3/problem-set/02-style-an-image/kitten-solution-instructions.jpg
deleted file mode 100644
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diff --git a/lessons/L3/problem-set/02-style-an-image/kitten-solution.jpg b/lessons/L3/problem-set/02-style-an-image/kitten-solution.jpg
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diff --git a/lessons/L3/problem-set/02-style-an-image/kitten.jpg b/lessons/L3/problem-set/02-style-an-image/kitten.jpg
deleted file mode 100644
index 88dede91b..000000000
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diff --git a/lessons/L3/problem-set/02-style-an-image/mac-cursor-hand.png b/lessons/L3/problem-set/02-style-an-image/mac-cursor-hand.png
deleted file mode 100644
index af7f68d0b..000000000
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diff --git a/lessons/L3/problem-set/02-style-an-image/mac-cursor.png b/lessons/L3/problem-set/02-style-an-image/mac-cursor.png
deleted file mode 100644
index c66e1f563..000000000
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diff --git a/lessons/L3/problem-set/02-style-an-image/question.html b/lessons/L3/problem-set/02-style-an-image/question.html
deleted file mode 100644
index 2df760c70..000000000
--- a/lessons/L3/problem-set/02-style-an-image/question.html
+++ /dev/null
@@ -1,18 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Replicate the same styling seen in the kitten image below. -->
-
-<html>
-<head>
-    <title>Style an Image Quiz</title>
-    <style>
-    	.kitten-image {
-            /* add CSS here */
-    	}
-    </style>
-</head>
-<body>
-	<!-- Image credit: Nicolas Suzor, https://www.flickr.com/photos/nicsuzor/ - via Flickr, Creative Commons. -->
-    <img src="http://udacity.github.io/fend/lessons/L3/problem-set/02-style-an-image/kitten.jpg" alt="kitten" class="kitten-image">
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/problem-set/02-style-an-image/question.md b/lessons/L3/problem-set/02-style-an-image/question.md
deleted file mode 100644
index 429f11b26..000000000
--- a/lessons/L3/problem-set/02-style-an-image/question.md
+++ /dev/null
@@ -1,43 +0,0 @@
-For your first quiz, I want you to take this black and white image of a kitten and add some style to it.
-
-![kitten image](http://udacity.github.io/fend/lessons/L3/problem-set/02-style-an-image/kitten.jpg)
-
-_Aww, isn't it cute!_ 🐱
-
-I'll give you the image and the HTML, and it will be your job to add the style. But, you won't be adding just any style. Instead, you will need to use properties for `border`, `cursor`, and `box-shadow` to produce the following result.
-
-![kitten solution](http://udacity.github.io/fend/lessons/L3/problem-set/02-style-an-image/kitten-solution.jpg)
-
-_Hint: The color of the border is salmon (#fa8072)_
-
-### Border
-
-If you've ever used a table in a word processor or spreedsheet, then you should be familiar with borders. With CSS, you can add a border to just about anything. There are a ton of different options for customizing borders like style, width, and color! Click [here](https://developer.mozilla.org/en-US/docs/Web/CSS/border "CSS Borders") to learn more.
-
-![border styles](http://udacity.github.io/fend/lessons/L3/problem-set/02-style-an-image/border-styles.jpg)
-
-_An example of the different border styles you can achieve with CSS_
-
-### Cursor
-
-It's possible you've never noticed your cursor change when viewing a website because it's so subtle. But, changing the cursor can be extremely helpful when trying to communicate things to the user. For example, if a user hovers over a link, changing the cursor to a pointer let's the user know the link can be clicked.
-
-![cursor example](http://udacity.github.io/fend/lessons/L3/problem-set/02-style-an-image/cursors.jpg)
-
-_A normal button on the left, and the same button while a mouse is hovering over it on the right_
-
-For most situations your browser automatically changes the cursor, but you can use the cursor property to override its behavior. See [this demo](https://css-tricks.com/almanac/properties/c/cursor/ "Cursors Demo") of all the different cursors in action! Obvisouly, this property only applies to users with a mouse 😉 .
-
-### Box-Shadow
-
-![box-shadow example](http://udacity.github.io/fend/lessons/L3/problem-set/02-style-an-image/box-shadow.jpg)
-
-_Use shadows to add a sense of depth to images_
-
-The box-shadow property is relatively new to the world of CSS. You can use it to add a shadow to an element. If you want to try experimenting with box-shadows, check out this [box-shadow generator](http://www.cssmatic.com/box-shadow "Box-Shadow Generator") from CSSmatic.
-
----
-
-### Image Credit
-
-- 'Kitten' by [Nicolas Suzor](https://www.flickr.com/photos/nicsuzor/) via Flickr, Creative Commons.
\ No newline at end of file
diff --git a/lessons/L3/problem-set/02-style-an-image/solution.gif b/lessons/L3/problem-set/02-style-an-image/solution.gif
deleted file mode 100644
index 8a8f3bff6..000000000
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diff --git a/lessons/L3/problem-set/02-style-an-image/tests.js b/lessons/L3/problem-set/02-style-an-image/tests.js
deleted file mode 100644
index f83d15e0c..000000000
--- a/lessons/L3/problem-set/02-style-an-image/tests.js
+++ /dev/null
@@ -1,678 +0,0 @@
-function performTesting() { return {result: 'noop'}; };
-var Grader = (function() {
-
-  // http://stackoverflow.com/questions/1068834/object-comparison-in-javascript?lq=1
-  function deepCompare () {
-    var i, l, leftChain, rightChain;
-
-    function compare2Objects (x, y) {
-      var p;
-
-      // remember that NaN === NaN returns false
-      // and isNaN(undefined) returns true
-      if (isNaN(x) && isNaN(y) && typeof x === 'number' && typeof y === 'number') {
-        return true;
-      }
-
-      // Compare primitives and functions.
-      // Check if both arguments link to the same object.
-      // Especially useful on step when comparing prototypes
-      if (x === y) {
-        return true;
-      }
-
-      // Works in case when functions are created in constructor.
-      // Comparing dates is a common scenario. Another built-ins?
-      // We can even handle functions passed across iframes
-      if ((typeof x === 'function' && typeof y === 'function') ||
-        (x instanceof Date && y instanceof Date) ||
-        (x instanceof RegExp && y instanceof RegExp) ||
-        (x instanceof String && y instanceof String) ||
-        (x instanceof Number && y instanceof Number)) {
-          return x.toString() === y.toString();
-      }
-
-      // At last checking prototypes as good a we can
-      if (!(x instanceof Object && y instanceof Object)) {
-        return false;
-      }
-
-      if (x.isPrototypeOf(y) || y.isPrototypeOf(x)) {
-        return false;
-      }
-
-      if (x.constructor !== y.constructor) {
-        return false;
-      }
-
-      if (x.prototype !== y.prototype) {
-        return false;
-      }
-
-      // Check for infinitive linking loops
-      if (leftChain.indexOf(x) > -1 || rightChain.indexOf(y) > -1) {
-         return false;
-      }
-
-      // Quick checking of one object beeing a subset of another.
-      // todo: cache the structure of arguments[0] for performance
-      for (p in y) {
-        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {
-          return false;
-        }
-        else if (typeof y[p] !== typeof x[p]) {
-          return false;
-        }
-      }
-
-      for (p in x) {
-        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {
-          return false;
-        }
-        else if (typeof y[p] !== typeof x[p]) {
-          return false;
-        }
-
-        switch (typeof (x[p])) {
-          case 'object':
-          case 'function':
-            leftChain.push(x);
-            rightChain.push(y);
-
-            if (!compare2Objects (x[p], y[p])) {
-              return false;
-            }
-
-            leftChain.pop();
-            rightChain.pop();
-            break;
-
-          default:
-            if (x[p] !== y[p]) {
-              return false;
-            }
-            break;
-        }
-      }
-
-      return true;
-    }
-
-    if (arguments.length < 1) {
-      return true; //Die silently? Don't know how to handle such case, please help...
-      // throw "Need two or more arguments to compare";
-    }
-
-    for (i = 1, l = arguments.length; i < l; i++) {
-
-      leftChain = []; //Todo: this can be cached
-      rightChain = [];
-
-      if (!compare2Objects(arguments[0], arguments[i])) {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  function Queue (grader) {
-    this.grader = grader;
-    this.gradingSteps = [];
-    this.flushing = false;
-    this.alwaysGo = false;
-  };
-
-  Queue.prototype = {
-    add: function(callback, messages, keepGoing) {
-      if (keepGoing !== false) {
-        keepGoing = true;
-      }
-
-      if (!callback) {
-        throw new Error("Every test added to the queue must have a valid function.");
-      }
-
-      this.gradingSteps.push({
-        callback: callback,
-        isCorrect: false,
-        wrongMessage: messages.wrongMessage || null,
-        comment: messages.comment || null,
-        category: messages.category || null,
-        keepGoing: keepGoing
-      });
-    },
-
-    _flush: function() {
-      if (!this.flushing) {
-        this.flushing = true;
-      }
-      this.step();
-    },
-
-    clear: function() {
-      this.flushing = false;
-      this.gradingSteps = [];
-      this.grader.endTests();
-    },
-
-    step: function() {
-      var self = this;
-      if (this.gradingSteps.length === 0) {
-        this.clear();
-      }
-
-      function executeInPromise (fn) {
-        return new Promise(function(resolve, reject) {
-          if (fn) {
-            try {
-              var result = fn();
-            } catch (e) {
-              self.clear();
-              console.log(e);
-            }
-          }
-          resolve(result);
-        });
-      };
-
-      function takeNextStep (test, result) {
-        test.isCorrect = result;
-
-        self.registerResults(test);
-
-        if (test.isCorrect || test.keepGoing || self.alwaysGo) {
-          self.step();
-        } else {
-          self.clear();
-        }
-      };
-
-      if (this.flushing) {
-        var test = this.gradingSteps.shift();
-
-        if (this.grader.async) {
-          executeInPromise(test.callback).then(function(resolve) {
-            takeNextStep(test, resolve);
-          });
-        } else if (!this.grader.async) {
-          try {
-            var result = test.callback();
-          } catch (e) {
-            console.log(e);
-            throw new Error();
-          }
-          takeNextStep(test, result);
-        }
-
-      }
-    },
-
-    registerResults: function(test) {
-      this.grader.registerResults(test);
-    }
-  };
-
-  function Grader (type, categoryMessages) {
-    var self = this;
-    this.specificFeedback = [];
-    this.comments = [];
-    this.isCorrect = false;
-    this.correctHasChanged = false;
-    this.queue = new Queue(self);
-    this.async = false;
-    this.categoryMessages = null;
-    this.generalFeedback = [];
-    this.onresult = function() {};
-
-    for (n in arguments) {
-      switch (typeof arguments[n]) {
-        case 'string':
-          if (arguments[n] === 'async') {
-            this.async = true;
-          } else if (arguments[n] === 'sync') {
-            this.async = false;
-          } else {
-            throw new Error("Invalid type argument in Grader constructor");
-          }
-          break;
-        case 'object':
-          this.categoryMessages = arguments[n];
-          break;
-        default:
-          throw new TypeError("Invalid argument in Grader constructor");
-          break;
-      }
-    }
-  };
-
-  Object.defineProperties(Grader.prototype, {
-    // sometimes used instead of isCorrect
-    is_correct: {
-      get: function() {
-        return this.isCorrect;
-      }
-    }
-  });
-
-  Grader.prototype = {
-    addTest: function(callback, messages, keepGoing) {
-      this.queue.add(callback, messages, keepGoing);
-    },
-
-    runTests: function(options) {
-      if (options) {
-        this.queue.alwaysGo = options.ignoreCheckpoints || false;
-      }
-      this.queue._flush();
-    },
-
-    endTests: function() {
-      if (this.queue.flushing) {
-        this.queue.clear();
-      } else {
-        var results = this.gatherResults();
-        this.onresult(results);
-      }
-    },
-
-    registerResults: function(test) {
-      this.generateSpecificFeedback(test);
-      this.generateGeneralFeedback(test);
-      this.setCorrect(test);
-    },
-
-    generateSpecificFeedback: function(test) {
-      if (!test.isCorrect && test.wrongMessage) {
-        this.addSpecificFeedback(test.wrongMessage);
-      } else if (test.isCorrect && test.comment) {
-        this.addComment(test.comment)
-      }
-    },
-
-    generateGeneralFeedback: function(test) {
-      if (!test.isCorrect && test.category) {
-        if (this.generalFeedback.indexOf(this.categoryMessages[test.category]) === -1) {
-          this.generalFeedback.push(this.categoryMessages[test.category]);
-        }
-      }
-    },
-
-    setCorrect: function(test) {
-      if (this.correctHasChanged) {
-        this.isCorrect = this.isCorrect && test.isCorrect;
-      } else {
-        this.correctHasChanged = true;
-        this.isCorrect = test.isCorrect;
-      }
-    },
-
-    addSpecificFeedback: function(feedback) {
-      this.specificFeedback.push(feedback);
-    },
-
-    addComment: function(feedback) {
-      this.comments.push(feedback);
-    },
-
-    gatherResults: function() {
-      var self = this;
-      return {
-        isCorrect: self.isCorrect,
-        testFeedback: self.specificFeedback.concat(self.generalFeedback),
-        testComments: self.comments
-      }
-    },
-
-    getFormattedWrongMessages: function(separator) {
-      var allMessages, message;
-
-      allMessages = this.specificFeedback.concat(this.generalFeedback);
-      message = allMessages.join(separator);
-
-      return message;
-    },
-
-    getFormattedComments: function(separator) {
-      return this.comments.join(separator);
-    },
-
-    isType: function(value, expectedType) {
-      var isCorrect = false;
-
-      if (typeof value !== expectedType) {
-
-        if (typeof value === 'function') {
-          value = value.name;
-        };
-
-        isCorrect = false;
-      } else if (typeof value === expectedType){
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isInstance: function(value, expectedInstance) {
-      var isCorrect = false;
-
-      if (value instanceof expectedInstance !== true) {
-
-        isCorrect = false;
-      } else if (value instanceof expectedInstance === true){
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isValue: function(value1, value2) {
-      var isCorrect = false;
-
-      if (!deepCompare(value1, value2)) {
-        isCorrect = false;
-      } else if (deepCompare(value1, value2)) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isInRange: function(value, lower, upper) {
-      var isCorrect = false;
-
-      if (typeof value !== 'number' || isNaN(value)) {
-        isCorrect = false
-      } else if (value > upper || value < lower) {
-        isCorrect = false;
-
-      } else if (value < upper || value > lower) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isSet: function(value) {
-      var isCorrect = false;
-
-      if (value === undefined) {
-        isCorrect = false;
-
-      } else {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isjQuery: function(elem) {
-      // could use obj.jquery, which will only return true if it is a jquery object
-      var isjQ = false;
-      if (elem instanceof $) {
-        isjQ = true;
-      }
-      return isjQ;
-    },
-
-    hasCorrectTag: function(elem, tag) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasTag = false;
-      if (elem.is(tag)) {
-        hasTag = true;
-      }
-      return hasTag;
-    },
-
-    hasCorrectClass: function(elem, className) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasClass = false;
-      if (elem.hasClass(className)) {
-        hasClass = true;
-      }
-      return hasClass;
-    },
-
-    hasCorrectId: function(elem, id) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.is('#' + id)) return true;
-      return false;
-    },
-
-    hasCorrectText: function(elem, text) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasText = false;
-      var re = new RegExp(text);
-      if (elem.text().match(re)) {
-        hasText = true;
-      }
-      return hasText;
-    },
-
-    hasAttr: function(elem, attrName, correctAttr) {
-      var isCorrect = false;
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (correctAttr && elem.attr(attrName) === correctAttr) {
-        isCorrect = true;
-      } else if (!correctAttr && elem.attr(attrName)) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    hasCorrectLength: function(elems, _length) {
-      if (!this.isjQuery(elems)) {
-        elems = $(elems);
-      }
-      var correctLength = false;
-      var cLength = elems.length;
-      if (cLength === _length) {
-        correctLength = true;
-      }
-      return correctLength;
-    },
-
-    isCorrectElem: function(elem, correctElem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.is(correctElem)) {
-        is = true;
-      }
-      return is;
-    },
-
-    isCorrectCollection: function(collection, correctCollection) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (collection.is(correctCollection)) {
-        is = true;
-      }
-      return is;
-    },
-
-    hasCorrectStyle: function(elem, cssProperty, _correctStyle) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasCorrectStyle = false;
-      /* if one style is passed, convert to array */
-      if (typeof _correctStyle === 'string') {
-      	_correctStyle = [_correctStyle];
-      }
-      var currentStyle = elem.css(cssProperty);
-      for (var i = 0; i < _correctStyle.length; i++) {
-          if (currentStyle === _correctStyle[i]) {
-            hasCorrectStyle = true;
-          }
-       }
-      return hasCorrectStyle;
-    },
-
-    propertyIsLessThan : function (elem, cssProperty, value) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.css(cssProperty) < value) {
-        is = true;
-      }
-      return is;
-    },
-
-    propertyIsGreaterThan : function (elem, cssProperty, value) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.css(cssProperty) > value) {
-        is = true;
-      }
-      return is;
-    },
-
-    doesExistInParent: function (elem, parentElem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (!this.isjQuery(parentElem)) {
-        parentElem = $(parentElem);
-      }
-      var inParent = false;
-      if (parentElem.find(elem).length > 0) {
-        inParent = true;
-      }
-      return inParent;
-    },
-
-    elemDoesExist: function(elem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var exists = false;
-      if (elem.length > 0) {
-        exists = true;
-      }
-      return exists;
-    },
-
-    areSiblings: function(elem1, elem2) {
-      if (!this.isjQuery(elem1)) {
-        elem1 = $(elem1);
-      }
-      if (!this.isjQuery(elem2)) {
-        elem2 = $(elem2);
-      }
-      var siblingLove = false;
-      if (elem1.siblings(elem2).length > 0) {
-        siblingLove = true;
-      }
-      return siblingLove;
-    },
-
-    isImmediateChild: function(elem, parentElem) {
-      var isCorrect = false;
-      if (this.isjQuery(elem)) {
-        throw new Error("elem needs to be a string for Grader.isImmediateChild()");
-      }
-      if (!this.isjQuery(parentElem)) {
-        parentElem = $(parentElem);
-      }
-      if (parentElem.children(elem).length > 0) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    hasParent: function(elem, parentElem) {
-      var isCorrect = false;
-      if (this.isjQuery(parentElem)) {
-        throw new Error("parentElem needs to be a string for Grader.hasParent()");
-      }
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.closest(parentElem).length > 0) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    sendResultsToExecutor: function(o) {
-      var output = JSON.stringify(o);
-      console.info("UDACITY_RESULT:" + output);
-    }
-  }
-  return Grader;
-})();
-function performSubmission() {
-  var grader = new Grader({
-    // can add shared messages here
-  });
-
-  grader.addTest(function() {
-    return (grader.propertyIsGreaterThan($('.kitten-image'), 'border-top-width', '0px') && grader.propertyIsGreaterThan($('.kitten-image'), 'border-bottom-width', '0px') && grader.propertyIsGreaterThan($('.kitten-image'), 'border-left-width', '0px') && grader.propertyIsGreaterThan($('.kitten-image'), 'border-right-width', '0px'));
-  }, {
-    wrongMessage: "The kitten image is missing a border. Try using the border or border-width property."
-  }, false);
-
-  grader.addTest(function() {
-    return (grader.hasCorrectStyle($('.kitten-image'), 'border-top-width', '5px') && grader.hasCorrectStyle($('.kitten-image'), 'border-bottom-width', '5px') && grader.hasCorrectStyle($('.kitten-image'), 'border-left-width', '5px') && grader.hasCorrectStyle($('.kitten-image'), 'border-right-width', '5px') && grader.hasCorrectStyle($('.kitten-image'), 'border-top-style', 'dashed') && grader.hasCorrectStyle($('.kitten-image'), 'border-bottom-style', 'dashed') && grader.hasCorrectStyle($('.kitten-image'), 'border-left-style', 'dashed') && grader.hasCorrectStyle($('.kitten-image'), 'border-right-style', 'dashed') && grader.hasCorrectStyle($('.kitten-image'), 'border-top-color', 'rgb(250, 128, 114)') && grader.hasCorrectStyle($('.kitten-image'), 'border-bottom-color', 'rgb(250, 128, 114)') && grader.hasCorrectStyle($('.kitten-image'), 'border-left-color', 'rgb(250, 128, 114)') && grader.hasCorrectStyle($('.kitten-image'), 'border-right-color', 'rgb(250, 128, 114)') && grader.propertyIsGreaterThan($('.kitten-image'), 'border-top-left-radius', '0px') && grader.propertyIsGreaterThan($('.kitten-image'), 'border-top-right-radius', '0px') && grader.propertyIsGreaterThan($('.kitten-image'), 'border-bottom-left-radius', '0px') && grader.propertyIsGreaterThan($('.kitten-image'), 'border-bottom-right-radius', '0px'));
-  }, {
-    wrongMessage: "Check your border's style."
-  });
-
-  grader.addTest(function() {
-    return (grader.hasCorrectStyle($('.kitten-image'), 'border-top-width', '5px') && grader.hasCorrectStyle($('.kitten-image'), 'border-bottom-width', '5px') && grader.hasCorrectStyle($('.kitten-image'), 'border-left-width', '5px') && grader.hasCorrectStyle($('.kitten-image'), 'border-right-width', '5px'));
-  }, {
-    wrongMessage: "The border's width looks off. Try setting the border's width to 5 pixels instead."
-  }, false);
-
-  grader.addTest(function() {
-    return (grader.hasCorrectStyle($('.kitten-image'), 'border-top-style', 'dashed') && grader.hasCorrectStyle($('.kitten-image'), 'border-bottom-style', 'dashed') && grader.hasCorrectStyle($('.kitten-image'), 'border-left-style', 'dashed') && grader.hasCorrectStyle($('.kitten-image'), 'border-right-style', 'dashed'));
-  }, {
-    wrongMessage: "The border around the kitten image has spaces.\nSee the different values for border-style using a CSS reference."
-  }, false);
-
-  grader.addTest(function() {
-    return (grader.hasCorrectStyle($('.kitten-image'), 'border-top-color', 'rgb(250, 128, 114)') && grader.hasCorrectStyle($('.kitten-image'), 'border-bottom-color', 'rgb(250, 128, 114)') && grader.hasCorrectStyle($('.kitten-image'), 'border-left-color', 'rgb(250, 128, 114)') && grader.hasCorrectStyle($('.kitten-image'), 'border-right-color', 'rgb(250, 128, 114)'));
-  }, {
-    wrongMessage: "The border color looks wrong.\nRemember, you can use named color values, like blue or silver, in CSS."
-  }, false);
-
-  grader.addTest(function() {
-    return (grader.propertyIsGreaterThan($('.kitten-image'), 'border-top-left-radius', '0px') && grader.propertyIsGreaterThan($('.kitten-image'), 'border-top-right-radius', '0px') && grader.propertyIsGreaterThan($('.kitten-image'), 'border-bottom-left-radius', '0px') && grader.propertyIsGreaterThan($('.kitten-image'), 'border-bottom-right-radius', '0px'));
-  }, {
-    wrongMessage: "The border around the kitten image needs rounded corners.\nHave you investigated all the different border properties in CSS yet?"
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasCorrectStyle($('.kitten-image'), 'cursor', 'pointer');
-  }, {
-    wrongMessage: "When you hover over the kitten image, the mouse cursor should be pointing.\nWhat property changes the mouse cursor? Try searching online to find the answer."
-  }, false);
-
-  grader.addTest(function() {
-    return !grader.hasCorrectStyle($('.kitten-image'), 'box-shadow', 'none');
-  }, {
-    wrongMessage: "You've almost got it!\nWhat's missing is subtle, but the kitten image should have a shadow.\nGo back and take a look at the box-shadow property."
-  });
-
-  grader.runTests();
-
-  result = {
-    is_correct: grader.isCorrect,
-    test_feedback: grader.getFormattedWrongMessages('\n'),
-    test_comments: grader.getFormattedComments('\n'),
-    congrats: "Awesome! As a front-end developer, it is common to replicate a concept in CSS."
-  };
-  return result;
-};
\ No newline at end of file
diff --git a/lessons/L3/problem-set/03-style-the-font/answer.html b/lessons/L3/problem-set/03-style-the-font/answer.html
deleted file mode 100644
index 41daa9c81..000000000
--- a/lessons/L3/problem-set/03-style-the-font/answer.html
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Replicate the same styling seen in the Udacity text below. -->
-
-<!-- Hints:
-
-* the font color is #8001ff
-* the font size has been increased
-* the text is using a sans-serif font
-
--->
-
-<html>
-<head>
-    <title>Style the Font Quiz</title>
-    <style>
-    	.udacity-text {
-			font-family: Helvetica;
-			font-size: 60px;
-			text-transform: uppercase;
-			text-decoration: underline;
-			color: #8001ff;
-    	}
-    </style>
-</head>
-<body>
-    <h1 class="udacity-text">udacity</h1>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/problem-set/03-style-the-font/answer.md b/lessons/L3/problem-set/03-style-the-font/answer.md
deleted file mode 100644
index 30c9fa3de..000000000
--- a/lessons/L3/problem-set/03-style-the-font/answer.md
+++ /dev/null
@@ -1,21 +0,0 @@
-Here's my answer:
-
-```css
-.udacity-text {
-  font-family: Helvetica, Arial, sans-serif;
-  font-size: 60px;
-  text-transform: uppercase;
-  text-decoration: underline;
-  color: #8001ff;
-}
-```
-
-The `font-family` property is used to change the font to Helvetica, Arial, or the default sans-serif font installed on the operating system.
-
-Next, the `font-size` property is used to increase the size of the font to be larger and the `text-transform` and `text-decoration` properties are used to capitalize and underline the text.
-
-Finally, `color` is used to change the color to the shade of purple you see in the solution image below.
-
-Check out the before and after:
-
-![text solution](http://udacity.github.io/fend/lessons/L3/problem-set/03-style-the-font/solution.gif)
\ No newline at end of file
diff --git a/lessons/L3/problem-set/03-style-the-font/fonts.jpg b/lessons/L3/problem-set/03-style-the-font/fonts.jpg
deleted file mode 100644
index e5f198644..000000000
Binary files a/lessons/L3/problem-set/03-style-the-font/fonts.jpg and /dev/null differ
diff --git a/lessons/L3/problem-set/03-style-the-font/instructions.md b/lessons/L3/problem-set/03-style-the-font/instructions.md
deleted file mode 100644
index e3711f704..000000000
--- a/lessons/L3/problem-set/03-style-the-font/instructions.md
+++ /dev/null
@@ -1,15 +0,0 @@
-### How to Complete this Quiz
-
-Edit `index.html` in the Udacity classroom to replicate the same styling seen in the solution image.
-
-![text solution](http://udacity.github.io/fend/lessons/L3/problem-set/03-style-the-font/text-solution-instructions.jpg)
-
-- Again, I've helped you out by writing the **selector** with an empty declaration block to put your changes. You're welcome 😉 .
-
-```css
-.udacity-text {
-  /* add CSS here */
-}
-```
-
-When you're ready, click "Skip to Quiz" to get started.
\ No newline at end of file
diff --git a/lessons/L3/problem-set/03-style-the-font/question.html b/lessons/L3/problem-set/03-style-the-font/question.html
deleted file mode 100644
index e5bd823e7..000000000
--- a/lessons/L3/problem-set/03-style-the-font/question.html
+++ /dev/null
@@ -1,17 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Replicate the same styling seen in the Udacity text below. -->
-
-<html>
-<head>
-    <title>Style the Font Quiz</title>
-    <style>
-    	.udacity-text {
-            /* add CSS here */
-    	}
-    </style>
-</head>
-<body>
-    <h1 class="udacity-text">udacity</h1>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/problem-set/03-style-the-font/question.md b/lessons/L3/problem-set/03-style-the-font/question.md
deleted file mode 100644
index 16bd0bfdb..000000000
--- a/lessons/L3/problem-set/03-style-the-font/question.md
+++ /dev/null
@@ -1,35 +0,0 @@
-For this quiz, you'll experiment with styling font using the "udacity" text below.
-
-![text image](http://udacity.github.io/fend/lessons/L3/problem-set/03-style-the-font/text.jpg)
-
-_This text looks pretty boring!_
-
-Just like the previous quiz, I'll give you the HTML and it will be your job to add the style. You'll need to use properties related to `font` and `text` to produce the following result.
-
-![text solution](http://udacity.github.io/fend/lessons/L3/problem-set/03-style-the-font/text-solution.jpg)
-
-_Hint: The font color is a shade of purple (`#8001ff`)_
-
-## Fonts
-
-When using fonts on the web, you must first consider what fonts are available to your users. Every operating system, be it Windows, OS X, or Linux, comes with a set of pre-installed fonts that you can use for customizing your website. For a complete list of "web-safe" fonts, follow this [link](http://www.cssfontstack.com/ "Web Safe Fonts").
-
-The way it works is fairly simple. When using the `font-family` property, you specify the font(s) you want to use in your HTML.
-
-```css
-font-family: font1, font2, font3, ...;
-```
-
-Then, the browser, starting from left to right, looks at the font(s) you've specified and checks to see if it can render the text using the font(s) you've provided. If it can't use the first font, then the browser moves to the next font, and so-on.
-
-The purpose for specifying multiple fonts is because not all fonts are available on every operating system. So, specifying multiple, similar fonts ensures users have a consistent experience regardless of the operating system they are using.
-
-![arial vs helvetica font](http://udacity.github.io/fend/lessons/L3/problem-set/03-style-the-font/fonts.jpg)
-
-_Arial vs. Helvetica comparison_
-
-In the solution, I specified `font-family: Helvetica, Arial, sans-serif;`. Therefore, the browser first tries to render the font Helvetica. On Macs this works because Helvetica is a standard font packaged with the operating system. However, on Windows and Linux machines, it is possible (not likely) that those operating systems do not have support for the Helvetica font by default, so the browser would then try to use Arial. If Arial doesn't exist, then the browser will use whatever sans-serif font is available.
-
-### Custom Fonts
-
-It is also possible to use custom fonts on the web. If you want to go ahead and start experimenting, you can check out [Google Fonts](https://www.google.com/fonts "Google Fonts") to see some open-source web fonts in action! With custom web fonts, it's not as important to specify multiple fonts like seen above; however, it is still smart to specify at least one backup font in case your custom font doesn't load.
\ No newline at end of file
diff --git a/lessons/L3/problem-set/03-style-the-font/solution.gif b/lessons/L3/problem-set/03-style-the-font/solution.gif
deleted file mode 100644
index bddc372ac..000000000
Binary files a/lessons/L3/problem-set/03-style-the-font/solution.gif and /dev/null differ
diff --git a/lessons/L3/problem-set/03-style-the-font/tests.js b/lessons/L3/problem-set/03-style-the-font/tests.js
deleted file mode 100644
index 68e063175..000000000
--- a/lessons/L3/problem-set/03-style-the-font/tests.js
+++ /dev/null
@@ -1,816 +0,0 @@
-var Grader = (function() {
-
-  /*!
-   * @overview es6-promise - a tiny implementation of Promises/A+.
-   * @copyright Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors (Conversion to ES6 API by Jake Archibald)
-   * @license   Licensed under MIT license
-   *            See https://raw.githubusercontent.com/jakearchibald/es6-promise/master/LICENSE
-   * @version   3.0.2
-   */
-  if (!Promise) {
-    (function(){"use strict";function lib$es6$promise$utils$$objectOrFunction(x){return typeof x==="function"||typeof x==="object"&&x!==null}function lib$es6$promise$utils$$isFunction(x){return typeof x==="function"}function lib$es6$promise$utils$$isMaybeThenable(x){return typeof x==="object"&&x!==null}var lib$es6$promise$utils$$_isArray;if(!Array.isArray){lib$es6$promise$utils$$_isArray=function(x){return Object.prototype.toString.call(x)==="[object Array]"}}else{lib$es6$promise$utils$$_isArray=Array.isArray}var lib$es6$promise$utils$$isArray=lib$es6$promise$utils$$_isArray;var lib$es6$promise$asap$$len=0;var lib$es6$promise$asap$$toString={}.toString;var lib$es6$promise$asap$$vertxNext;var lib$es6$promise$asap$$customSchedulerFn;var lib$es6$promise$asap$$asap=function asap(callback,arg){lib$es6$promise$asap$$queue[lib$es6$promise$asap$$len]=callback;lib$es6$promise$asap$$queue[lib$es6$promise$asap$$len+1]=arg;lib$es6$promise$asap$$len+=2;if(lib$es6$promise$asap$$len===2){if(lib$es6$promise$asap$$customSchedulerFn){lib$es6$promise$asap$$customSchedulerFn(lib$es6$promise$asap$$flush)}else{lib$es6$promise$asap$$scheduleFlush()}}};function lib$es6$promise$asap$$setScheduler(scheduleFn){lib$es6$promise$asap$$customSchedulerFn=scheduleFn}function lib$es6$promise$asap$$setAsap(asapFn){lib$es6$promise$asap$$asap=asapFn}var lib$es6$promise$asap$$browserWindow=typeof window!=="undefined"?window:undefined;var lib$es6$promise$asap$$browserGlobal=lib$es6$promise$asap$$browserWindow||{};var lib$es6$promise$asap$$BrowserMutationObserver=lib$es6$promise$asap$$browserGlobal.MutationObserver||lib$es6$promise$asap$$browserGlobal.WebKitMutationObserver;var lib$es6$promise$asap$$isNode=typeof process!=="undefined"&&{}.toString.call(process)==="[object process]";var lib$es6$promise$asap$$isWorker=typeof Uint8ClampedArray!=="undefined"&&typeof importScripts!=="undefined"&&typeof MessageChannel!=="undefined";function lib$es6$promise$asap$$useNextTick(){return function(){process.nextTick(lib$es6$promise$asap$$flush)}}function lib$es6$promise$asap$$useVertxTimer(){return function(){lib$es6$promise$asap$$vertxNext(lib$es6$promise$asap$$flush)}}function lib$es6$promise$asap$$useMutationObserver(){var iterations=0;var observer=new lib$es6$promise$asap$$BrowserMutationObserver(lib$es6$promise$asap$$flush);var node=document.createTextNode("");observer.observe(node,{characterData:true});return function(){node.data=iterations=++iterations%2}}function lib$es6$promise$asap$$useMessageChannel(){var channel=new MessageChannel;channel.port1.onmessage=lib$es6$promise$asap$$flush;return function(){channel.port2.postMessage(0)}}function lib$es6$promise$asap$$useSetTimeout(){return function(){setTimeout(lib$es6$promise$asap$$flush,1)}}var lib$es6$promise$asap$$queue=new Array(1e3);function lib$es6$promise$asap$$flush(){for(var i=0;i<lib$es6$promise$asap$$len;i+=2){var callback=lib$es6$promise$asap$$queue[i];var arg=lib$es6$promise$asap$$queue[i+1];callback(arg);lib$es6$promise$asap$$queue[i]=undefined;lib$es6$promise$asap$$queue[i+1]=undefined}lib$es6$promise$asap$$len=0}function lib$es6$promise$asap$$attemptVertx(){try{var r=require;var vertx=r("vertx");lib$es6$promise$asap$$vertxNext=vertx.runOnLoop||vertx.runOnContext;return lib$es6$promise$asap$$useVertxTimer()}catch(e){return lib$es6$promise$asap$$useSetTimeout()}}var lib$es6$promise$asap$$scheduleFlush;if(lib$es6$promise$asap$$isNode){lib$es6$promise$asap$$scheduleFlush=lib$es6$promise$asap$$useNextTick()}else if(lib$es6$promise$asap$$BrowserMutationObserver){lib$es6$promise$asap$$scheduleFlush=lib$es6$promise$asap$$useMutationObserver()}else if(lib$es6$promise$asap$$isWorker){lib$es6$promise$asap$$scheduleFlush=lib$es6$promise$asap$$useMessageChannel()}else if(lib$es6$promise$asap$$browserWindow===undefined&&typeof require==="function"){lib$es6$promise$asap$$scheduleFlush=lib$es6$promise$asap$$attemptVertx()}else{lib$es6$promise$asap$$scheduleFlush=lib$es6$promise$asap$$useSetTimeout()}function lib$es6$promise$$internal$$noop(){}var lib$es6$promise$$internal$$PENDING=void 0;var lib$es6$promise$$internal$$FULFILLED=1;var lib$es6$promise$$internal$$REJECTED=2;var lib$es6$promise$$internal$$GET_THEN_ERROR=new lib$es6$promise$$internal$$ErrorObject;function lib$es6$promise$$internal$$selfFulfillment(){return new TypeError("You cannot resolve a promise with itself")}function lib$es6$promise$$internal$$cannotReturnOwn(){return new TypeError("A promises callback cannot return that same promise.")}function lib$es6$promise$$internal$$getThen(promise){try{return promise.then}catch(error){lib$es6$promise$$internal$$GET_THEN_ERROR.error=error;return lib$es6$promise$$internal$$GET_THEN_ERROR}}function lib$es6$promise$$internal$$tryThen(then,value,fulfillmentHandler,rejectionHandler){try{then.call(value,fulfillmentHandler,rejectionHandler)}catch(e){return e}}function lib$es6$promise$$internal$$handleForeignThenable(promise,thenable,then){lib$es6$promise$asap$$asap(function(promise){var sealed=false;var error=lib$es6$promise$$internal$$tryThen(then,thenable,function(value){if(sealed){return}sealed=true;if(thenable!==value){lib$es6$promise$$internal$$resolve(promise,value)}else{lib$es6$promise$$internal$$fulfill(promise,value)}},function(reason){if(sealed){return}sealed=true;lib$es6$promise$$internal$$reject(promise,reason)},"Settle: "+(promise._label||" unknown promise"));if(!sealed&&error){sealed=true;lib$es6$promise$$internal$$reject(promise,error)}},promise)}function lib$es6$promise$$internal$$handleOwnThenable(promise,thenable){if(thenable._state===lib$es6$promise$$internal$$FULFILLED){lib$es6$promise$$internal$$fulfill(promise,thenable._result)}else if(thenable._state===lib$es6$promise$$internal$$REJECTED){lib$es6$promise$$internal$$reject(promise,thenable._result)}else{lib$es6$promise$$internal$$subscribe(thenable,undefined,function(value){lib$es6$promise$$internal$$resolve(promise,value)},function(reason){lib$es6$promise$$internal$$reject(promise,reason)})}}function lib$es6$promise$$internal$$handleMaybeThenable(promise,maybeThenable){if(maybeThenable.constructor===promise.constructor){lib$es6$promise$$internal$$handleOwnThenable(promise,maybeThenable)}else{var then=lib$es6$promise$$internal$$getThen(maybeThenable);if(then===lib$es6$promise$$internal$$GET_THEN_ERROR){lib$es6$promise$$internal$$reject(promise,lib$es6$promise$$internal$$GET_THEN_ERROR.error)}else if(then===undefined){lib$es6$promise$$internal$$fulfill(promise,maybeThenable)}else if(lib$es6$promise$utils$$isFunction(then)){lib$es6$promise$$internal$$handleForeignThenable(promise,maybeThenable,then)}else{lib$es6$promise$$internal$$fulfill(promise,maybeThenable)}}}function lib$es6$promise$$internal$$resolve(promise,value){if(promise===value){lib$es6$promise$$internal$$reject(promise,lib$es6$promise$$internal$$selfFulfillment())}else if(lib$es6$promise$utils$$objectOrFunction(value)){lib$es6$promise$$internal$$handleMaybeThenable(promise,value)}else{lib$es6$promise$$internal$$fulfill(promise,value)}}function lib$es6$promise$$internal$$publishRejection(promise){if(promise._onerror){promise._onerror(promise._result)}lib$es6$promise$$internal$$publish(promise)}function lib$es6$promise$$internal$$fulfill(promise,value){if(promise._state!==lib$es6$promise$$internal$$PENDING){return}promise._result=value;promise._state=lib$es6$promise$$internal$$FULFILLED;if(promise._subscribers.length!==0){lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish,promise)}}function lib$es6$promise$$internal$$reject(promise,reason){if(promise._state!==lib$es6$promise$$internal$$PENDING){return}promise._state=lib$es6$promise$$internal$$REJECTED;promise._result=reason;lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publishRejection,promise)}function lib$es6$promise$$internal$$subscribe(parent,child,onFulfillment,onRejection){var subscribers=parent._subscribers;var length=subscribers.length;parent._onerror=null;subscribers[length]=child;subscribers[length+lib$es6$promise$$internal$$FULFILLED]=onFulfillment;subscribers[length+lib$es6$promise$$internal$$REJECTED]=onRejection;if(length===0&&parent._state){lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish,parent)}}function lib$es6$promise$$internal$$publish(promise){var subscribers=promise._subscribers;var settled=promise._state;if(subscribers.length===0){return}var child,callback,detail=promise._result;for(var i=0;i<subscribers.length;i+=3){child=subscribers[i];callback=subscribers[i+settled];if(child){lib$es6$promise$$internal$$invokeCallback(settled,child,callback,detail)}else{callback(detail)}}promise._subscribers.length=0}function lib$es6$promise$$internal$$ErrorObject(){this.error=null}var lib$es6$promise$$internal$$TRY_CATCH_ERROR=new lib$es6$promise$$internal$$ErrorObject;function lib$es6$promise$$internal$$tryCatch(callback,detail){try{return callback(detail)}catch(e){lib$es6$promise$$internal$$TRY_CATCH_ERROR.error=e;return lib$es6$promise$$internal$$TRY_CATCH_ERROR}}function lib$es6$promise$$internal$$invokeCallback(settled,promise,callback,detail){var hasCallback=lib$es6$promise$utils$$isFunction(callback),value,error,succeeded,failed;if(hasCallback){value=lib$es6$promise$$internal$$tryCatch(callback,detail);if(value===lib$es6$promise$$internal$$TRY_CATCH_ERROR){failed=true;error=value.error;value=null}else{succeeded=true}if(promise===value){lib$es6$promise$$internal$$reject(promise,lib$es6$promise$$internal$$cannotReturnOwn());return}}else{value=detail;succeeded=true}if(promise._state!==lib$es6$promise$$internal$$PENDING){}else if(hasCallback&&succeeded){lib$es6$promise$$internal$$resolve(promise,value)}else if(failed){lib$es6$promise$$internal$$reject(promise,error)}else if(settled===lib$es6$promise$$internal$$FULFILLED){lib$es6$promise$$internal$$fulfill(promise,value)}else if(settled===lib$es6$promise$$internal$$REJECTED){lib$es6$promise$$internal$$reject(promise,value)}}function lib$es6$promise$$internal$$initializePromise(promise,resolver){try{resolver(function resolvePromise(value){lib$es6$promise$$internal$$resolve(promise,value)},function rejectPromise(reason){lib$es6$promise$$internal$$reject(promise,reason)})}catch(e){lib$es6$promise$$internal$$reject(promise,e)}}function lib$es6$promise$enumerator$$Enumerator(Constructor,input){var enumerator=this;enumerator._instanceConstructor=Constructor;enumerator.promise=new Constructor(lib$es6$promise$$internal$$noop);if(enumerator._validateInput(input)){enumerator._input=input;enumerator.length=input.length;enumerator._remaining=input.length;enumerator._init();if(enumerator.length===0){lib$es6$promise$$internal$$fulfill(enumerator.promise,enumerator._result)}else{enumerator.length=enumerator.length||0;enumerator._enumerate();if(enumerator._remaining===0){lib$es6$promise$$internal$$fulfill(enumerator.promise,enumerator._result)}}}else{lib$es6$promise$$internal$$reject(enumerator.promise,enumerator._validationError())}}lib$es6$promise$enumerator$$Enumerator.prototype._validateInput=function(input){return lib$es6$promise$utils$$isArray(input)};lib$es6$promise$enumerator$$Enumerator.prototype._validationError=function(){return new Error("Array Methods must be provided an Array")};lib$es6$promise$enumerator$$Enumerator.prototype._init=function(){this._result=new Array(this.length)};var lib$es6$promise$enumerator$$default=lib$es6$promise$enumerator$$Enumerator;lib$es6$promise$enumerator$$Enumerator.prototype._enumerate=function(){var enumerator=this;var length=enumerator.length;var promise=enumerator.promise;var input=enumerator._input;for(var i=0;promise._state===lib$es6$promise$$internal$$PENDING&&i<length;i++){enumerator._eachEntry(input[i],i)}};lib$es6$promise$enumerator$$Enumerator.prototype._eachEntry=function(entry,i){var enumerator=this;var c=enumerator._instanceConstructor;if(lib$es6$promise$utils$$isMaybeThenable(entry)){if(entry.constructor===c&&entry._state!==lib$es6$promise$$internal$$PENDING){entry._onerror=null;enumerator._settledAt(entry._state,i,entry._result)}else{enumerator._willSettleAt(c.resolve(entry),i)}}else{enumerator._remaining--;enumerator._result[i]=entry}};lib$es6$promise$enumerator$$Enumerator.prototype._settledAt=function(state,i,value){var enumerator=this;var promise=enumerator.promise;if(promise._state===lib$es6$promise$$internal$$PENDING){enumerator._remaining--;if(state===lib$es6$promise$$internal$$REJECTED){lib$es6$promise$$internal$$reject(promise,value)}else{enumerator._result[i]=value}}if(enumerator._remaining===0){lib$es6$promise$$internal$$fulfill(promise,enumerator._result)}};lib$es6$promise$enumerator$$Enumerator.prototype._willSettleAt=function(promise,i){var enumerator=this;lib$es6$promise$$internal$$subscribe(promise,undefined,function(value){enumerator._settledAt(lib$es6$promise$$internal$$FULFILLED,i,value)},function(reason){enumerator._settledAt(lib$es6$promise$$internal$$REJECTED,i,reason)})};function lib$es6$promise$promise$all$$all(entries){return new lib$es6$promise$enumerator$$default(this,entries).promise}var lib$es6$promise$promise$all$$default=lib$es6$promise$promise$all$$all;function lib$es6$promise$promise$race$$race(entries){var Constructor=this;var promise=new Constructor(lib$es6$promise$$internal$$noop);if(!lib$es6$promise$utils$$isArray(entries)){lib$es6$promise$$internal$$reject(promise,new TypeError("You must pass an array to race."));return promise}var length=entries.length;function onFulfillment(value){lib$es6$promise$$internal$$resolve(promise,value)}function onRejection(reason){lib$es6$promise$$internal$$reject(promise,reason)}for(var i=0;promise._state===lib$es6$promise$$internal$$PENDING&&i<length;i++){lib$es6$promise$$internal$$subscribe(Constructor.resolve(entries[i]),undefined,onFulfillment,onRejection)}return promise}var lib$es6$promise$promise$race$$default=lib$es6$promise$promise$race$$race;function lib$es6$promise$promise$resolve$$resolve(object){var Constructor=this;if(object&&typeof object==="object"&&object.constructor===Constructor){return object}var promise=new Constructor(lib$es6$promise$$internal$$noop);lib$es6$promise$$internal$$resolve(promise,object);return promise}var lib$es6$promise$promise$resolve$$default=lib$es6$promise$promise$resolve$$resolve;function lib$es6$promise$promise$reject$$reject(reason){var Constructor=this;var promise=new Constructor(lib$es6$promise$$internal$$noop);lib$es6$promise$$internal$$reject(promise,reason);return promise}var lib$es6$promise$promise$reject$$default=lib$es6$promise$promise$reject$$reject;var lib$es6$promise$promise$$counter=0;function lib$es6$promise$promise$$needsResolver(){throw new TypeError("You must pass a resolver function as the first argument to the promise constructor")}function lib$es6$promise$promise$$needsNew(){throw new TypeError("Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.")}var lib$es6$promise$promise$$default=lib$es6$promise$promise$$Promise;function lib$es6$promise$promise$$Promise(resolver){this._id=lib$es6$promise$promise$$counter++;this._state=undefined;this._result=undefined;this._subscribers=[];if(lib$es6$promise$$internal$$noop!==resolver){if(!lib$es6$promise$utils$$isFunction(resolver)){lib$es6$promise$promise$$needsResolver()}if(!(this instanceof lib$es6$promise$promise$$Promise)){lib$es6$promise$promise$$needsNew()}lib$es6$promise$$internal$$initializePromise(this,resolver)}}lib$es6$promise$promise$$Promise.all=lib$es6$promise$promise$all$$default;lib$es6$promise$promise$$Promise.race=lib$es6$promise$promise$race$$default;lib$es6$promise$promise$$Promise.resolve=lib$es6$promise$promise$resolve$$default;lib$es6$promise$promise$$Promise.reject=lib$es6$promise$promise$reject$$default;lib$es6$promise$promise$$Promise._setScheduler=lib$es6$promise$asap$$setScheduler;lib$es6$promise$promise$$Promise._setAsap=lib$es6$promise$asap$$setAsap;lib$es6$promise$promise$$Promise._asap=lib$es6$promise$asap$$asap;lib$es6$promise$promise$$Promise.prototype={constructor:lib$es6$promise$promise$$Promise,then:function(onFulfillment,onRejection){var parent=this;var state=parent._state;if(state===lib$es6$promise$$internal$$FULFILLED&&!onFulfillment||state===lib$es6$promise$$internal$$REJECTED&&!onRejection){return this}var child=new this.constructor(lib$es6$promise$$internal$$noop);var result=parent._result;if(state){var callback=arguments[state-1];lib$es6$promise$asap$$asap(function(){lib$es6$promise$$internal$$invokeCallback(state,child,callback,result)})}else{lib$es6$promise$$internal$$subscribe(parent,child,onFulfillment,onRejection)}return child},"catch":function(onRejection){return this.then(null,onRejection)}};function lib$es6$promise$polyfill$$polyfill(){var local;if(typeof global!=="undefined"){local=global}else if(typeof self!=="undefined"){local=self}else{try{local=Function("return this")()}catch(e){throw new Error("polyfill failed because global object is unavailable in this environment")}}var P=local.Promise;if(P&&Object.prototype.toString.call(P.resolve())==="[object Promise]"&&!P.cast){return}local.Promise=lib$es6$promise$promise$$default}var lib$es6$promise$polyfill$$default=lib$es6$promise$polyfill$$polyfill;var lib$es6$promise$umd$$ES6Promise={Promise:lib$es6$promise$promise$$default,polyfill:lib$es6$promise$polyfill$$default};if(typeof define==="function"&&define["amd"]){define(function(){return lib$es6$promise$umd$$ES6Promise})}else if(typeof module!=="undefined"&&module["exports"]){module["exports"]=lib$es6$promise$umd$$ES6Promise}else if(typeof this!=="undefined"){this["ES6Promise"]=lib$es6$promise$umd$$ES6Promise}lib$es6$promise$polyfill$$default()}).call(this);
-  }
-
-  // http://stackoverflow.com/questions/1068834/object-comparison-in-javascript?lq=1
-  function deepCompare () {
-    var i, l, leftChain, rightChain;
-
-    function compare2Objects (x, y) {
-      var p;
-
-      // remember that NaN === NaN returns false
-      // and isNaN(undefined) returns true
-      if (isNaN(x) && isNaN(y) && typeof x === 'number' && typeof y === 'number') {
-        return true;
-      }
-
-      // Compare primitives and functions.
-      // Check if both arguments link to the same object.
-      // Especially useful on step when comparing prototypes
-      if (x === y) {
-        return true;
-      }
-
-      // Works in case when functions are created in constructor.
-      // Comparing dates is a common scenario. Another built-ins?
-      // We can even handle functions passed across iframes
-      if ((typeof x === 'function' && typeof y === 'function') ||
-        (x instanceof Date && y instanceof Date) ||
-        (x instanceof RegExp && y instanceof RegExp) ||
-        (x instanceof String && y instanceof String) ||
-        (x instanceof Number && y instanceof Number)) {
-          return x.toString() === y.toString();
-      }
-
-      // At last checking prototypes as good a we can
-      if (!(x instanceof Object && y instanceof Object)) {
-        return false;
-      }
-
-      if (x.isPrototypeOf(y) || y.isPrototypeOf(x)) {
-        return false;
-      }
-
-      if (x.constructor !== y.constructor) {
-        return false;
-      }
-
-      if (x.prototype !== y.prototype) {
-        return false;
-      }
-
-      // Check for infinitive linking loops
-      if (leftChain.indexOf(x) > -1 || rightChain.indexOf(y) > -1) {
-         return false;
-      }
-
-      // Quick checking of one object beeing a subset of another.
-      // todo: cache the structure of arguments[0] for performance
-      for (p in y) {
-        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {
-          return false;
-        }
-        else if (typeof y[p] !== typeof x[p]) {
-          return false;
-        }
-      }
-
-      for (p in x) {
-        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {
-          return false;
-        }
-        else if (typeof y[p] !== typeof x[p]) {
-          return false;
-        }
-
-        switch (typeof (x[p])) {
-          case 'object':
-          case 'function':
-            leftChain.push(x);
-            rightChain.push(y);
-
-            if (!compare2Objects (x[p], y[p])) {
-              return false;
-            }
-
-            leftChain.pop();
-            rightChain.pop();
-            break;
-
-          default:
-            if (x[p] !== y[p]) {
-              return false;
-            }
-            break;
-        }
-      }
-
-      return true;
-    }
-
-    if (arguments.length < 1) {
-      return true; //Die silently? Don't know how to handle such case, please help...
-      // throw "Need two or more arguments to compare";
-    }
-
-    for (i = 1, l = arguments.length; i < l; i++) {
-
-      leftChain = []; //Todo: this can be cached
-      rightChain = [];
-
-      if (!compare2Objects(arguments[0], arguments[i])) {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  function Queue (grader) {
-    this.grader = grader;
-    this.gradingSteps = [];
-    this.flushing = false;
-    this.alwaysGo = false;
-  };
-
-  Queue.prototype = {
-    add: function(callback, messages, keepGoing) {
-      if (keepGoing !== false) {
-        keepGoing = true;
-      }
-
-      if (!callback) {
-        throw new Error("Every test added to the queue must have a valid function.");
-      }
-
-      this.gradingSteps.push({
-        callback: callback,
-        isCorrect: false,
-        wrongMessage: messages.wrongMessage || null,
-        comment: messages.comment || null,
-        category: messages.category || null,
-        keepGoing: keepGoing
-      });
-    },
-
-    _flush: function () {
-      if (!this.flushing) {
-        this.flushing = true;
-      }
-      this.step();
-    },
-
-    clear: function () {
-      this.flushing = false;
-      this.gradingSteps = [];
-      this.grader.endTests();
-    },
-
-    step: function () {
-      var self = this;
-      if (this.gradingSteps.length === 0) {
-        this.clear();
-      }
-
-      function executeInPromise (fn) {
-        return new Promise(function (resolve, reject) {
-          if (fn) {
-            try {
-              var result = fn();
-            } catch (e) {
-              self.clear();
-              console.log(e);
-            }
-          }
-          resolve(result);
-        });
-      };
-
-      function takeNextStep (test, result) {
-        test.isCorrect = result;
-
-        self.registerResults(test);
-
-        if (test.isCorrect || test.keepGoing || self.alwaysGo) {
-          self.step();
-        } else {
-          self.clear();
-        }
-      };
-
-      if (this.flushing) {
-        var test = this.gradingSteps.shift();
-
-        if (this.grader.async) {
-          executeInPromise(test.callback).then(function (resolve) {
-            takeNextStep(test, resolve);
-          });
-        } else if (!this.grader.async) {
-          try {
-            var result = test.callback();
-          } catch (e) {
-            console.log(e);
-            throw new Error();
-          }
-          takeNextStep(test, result);
-        }
-
-      }
-    },
-
-    registerResults: function (test) {
-      this.grader.registerResults(test);
-    }
-  };
-
-  function Grader (type, categoryMessages) {
-    var self = this;
-    this.specificFeedback = [];
-    this.comments = [];
-    this.isCorrect = false;
-    this.correctHasChanged = false;
-    this.queue = new Queue(self);
-    this.async = false;
-    this.categoryMessages = null;
-    this.generalFeedback = [];
-    this.onresult = function () {};
-
-    for (n in arguments) {
-      switch (typeof arguments[n]) {
-        case 'string':
-          if (arguments[n] === 'async') {
-            this.async = true;
-          } else if (arguments[n] === 'sync') {
-            this.async = false;
-          } else {
-            throw new Error("Invalid type argument in Grader constructor");
-          }
-          break;
-        case 'object':
-          this.categoryMessages = arguments[n];
-          break;
-        default:
-          throw new TypeError("Invalid argument in Grader constructor");
-          break;
-      }
-    }
-  };
-
-  Grader.prototype = {
-    addTest: function (callback, messages, keepGoing) {
-      this.queue.add(callback, messages, keepGoing);
-    },
-
-    runTests: function (options) {
-      if (options) {
-        this.queue.alwaysGo = options.ignoreCheckpoints || false;
-      }
-      this.queue._flush();
-    },
-
-    endTests: function () {
-      if (this.queue.flushing) {
-        this.queue.clear();
-      } else {
-        var results = this.gatherResults();
-        this.onresult(results);
-      }
-    },
-
-    registerResults: function (test) {
-      this.generateSpecificFeedback(test);
-      this.generateGeneralFeedback(test);
-      this.setCorrect(test);
-    },
-
-    generateSpecificFeedback: function (test) {
-      if (!test.isCorrect && test.wrongMessage) {
-        this.addSpecificFeedback(test.wrongMessage);
-      } else if (test.isCorrect && test.comment) {
-        this.addComment(test.comment)
-      }
-    },
-
-    generateGeneralFeedback: function (test) {
-      if (!test.isCorrect && test.category) {
-        if (this.generalFeedback.indexOf(this.categoryMessages[test.category]) === -1) {
-          this.generalFeedback.push(this.categoryMessages[test.category]);
-        }
-      }
-    },
-
-    setCorrect: function (test) {
-      if (this.correctHasChanged) {
-        this.isCorrect = this.isCorrect && test.isCorrect;
-      } else {
-        this.correctHasChanged = true;
-        this.isCorrect = test.isCorrect;
-      }
-    },
-
-    addSpecificFeedback: function (feedback) {
-      this.specificFeedback.push(feedback);
-    },
-
-    addComment: function (feedback) {
-      this.comments.push(feedback);
-    },
-
-    gatherResults: function () {
-      var self = this;
-      return {
-        isCorrect: self.isCorrect,
-        testFeedback: self.specificFeedback.concat(self.generalFeedback),
-        testComments: self.comments
-      }
-    },
-
-    getFormattedWrongMessages: function (separator) {
-      var allMessages, message;
-
-      allMessages = this.specificFeedback.concat(this.generalFeedback);
-      message = allMessages.join(separator);
-
-      return message;
-    },
-
-    getFormattedComments: function (separator) {
-      return this.comments.join(separator);
-    },
-
-    isType: function (value, expectedType) {
-      var isCorrect = false;
-
-      if (typeof value !== expectedType) {
-
-        if (typeof value === 'function') {
-          value = value.name;
-        };
-
-        isCorrect = false;
-      } else if (typeof value === expectedType){
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isInstance: function (value, expectedInstance) {
-      var isCorrect = false;
-
-      if (value instanceof expectedInstance !== true) {
-
-        isCorrect = false;
-      } else if (value instanceof expectedInstance === true){
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isValue: function (value1, value2) {
-      var isCorrect = false;
-
-      if (!deepCompare(value1, value2)) {
-        isCorrect = false;
-      } else if (deepCompare(value1, value2)) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isInRange: function (value, lower, upper) {
-      var isCorrect = false;
-
-      if (typeof value !== 'number' || isNaN(value)) {
-        isCorrect = false
-      } else if (value > upper || value < lower) {
-        isCorrect = false;
-
-      } else if (value < upper || value > lower) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isSet: function (value) {
-      var isCorrect = false;
-
-      if (value === undefined) {
-        isCorrect = false;
-
-      } else {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isjQuery: function (elem) {
-      // could use obj.jquery, which will only return true if it is a jquery object
-      var isjQ = false;
-      if (elem instanceof $) {
-        isjQ = true;
-      }
-      return isjQ;
-    },
-
-    hasCorrectTag: function (elem, tag) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasTag = false;
-      if (elem.is(tag)) {
-        hasTag = true;
-      }
-      return hasTag;
-    },
-
-    hasCorrectClass: function (elem, className) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasClass = false;
-      if (elem.hasClass(className)) {
-        hasClass = true;
-      }
-      return hasClass;
-    },
-
-    hasCorrectId: function (elem, id) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.is('#' + id)) return true;
-      return false;
-    },
-
-    hasCorrectText: function (elem, text) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasText = false;
-      var re = new RegExp(text);
-      if (elem.text().match(re)) {
-        hasText = true;
-      }
-      return hasText;
-    },
-
-    hasAttr: function (elem, attrName, correctAttr) {
-      var isCorrect = false;
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (correctAttr && elem.attr(attrName) === correctAttr) {
-        isCorrect = true;
-      } else if (!correctAttr && elem.attr(attrName)) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    hasCorrectLength: function (elems, _length) {
-      if (!this.isjQuery(elems)) {
-        elems = $(elems);
-      }
-      var correctLength = false;
-      var cLength = elems.length;
-      if (cLength === _length) {
-        correctLength = true;
-      }
-      return correctLength;
-    },
-
-    isCorrectElem: function (elem, correctElem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.is(correctElem)) {
-        is = true;
-      }
-      return is;
-    },
-
-    isCorrectCollection: function (collection, correctCollection) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (collection.is(correctCollection)) {
-        is = true;
-      }
-      return is;
-    },
-
-    hasCorrectStyle: function (elem, cssProperty, _correctStyle) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasCorrectStyle = false;
-      /* if one style is passed, convert to array */
-      if (typeof _correctStyle === 'string') {
-        _correctStyle = [_correctStyle];
-      }
-      var currentStyle = elem.css(cssProperty);
-      for (var i = 0; i < _correctStyle.length; i++) {
-          if (currentStyle === _correctStyle[i]) {
-            hasCorrectStyle = true;
-          }
-       }
-      return hasCorrectStyle;
-    },
-
-    hasCorrectFont: function (elem, cssProperty, _correctStyle) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasCorrectStyle = false;
-      /* if one style is passed, convert to array */
-      if (typeof _correctStyle === 'string') {
-        _correctStyle = [_correctStyle];
-      }
-      var fonts = elem.css(cssProperty);
-      fonts = fonts.split(',');
-      var currentStyle = detectFont(fonts);
-      for (var i = 0; i < _correctStyle.length; i++) {
-          if (currentStyle === _correctStyle[i]) {
-            hasCorrectStyle = true;
-          }
-       }
-      return hasCorrectStyle;
-    },
-
-    propertyIsLessThan : function (elem, cssProperty, value) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.css(cssProperty) < value) {
-        is = true;
-      }
-      return is;
-    },
-
-    propertyIsGreaterThan : function (elem, cssProperty, value) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.css(cssProperty) > value) {
-        is = true;
-      }
-      return is;
-    },
-
-    doesExistInParent: function (elem, parentElem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (!this.isjQuery(parentElem)) {
-        parentElem = $(parentElem);
-      }
-      var inParent = false;
-      if (parentElem.find(elem).length > 0) {
-        inParent = true;
-      }
-      return inParent;
-    },
-
-    elemDoesExist: function (elem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var exists = false;
-      if (elem.length > 0) {
-        exists = true;
-      }
-      return exists;
-    },
-
-    areSiblings: function (elem1, elem2) {
-      if (!this.isjQuery(elem1)) {
-        elem1 = $(elem1);
-      }
-      if (!this.isjQuery(elem2)) {
-        elem2 = $(elem2);
-      }
-      var siblingLove = false;
-      if (elem1.siblings(elem2).length > 0) {
-        siblingLove = true;
-      }
-      return siblingLove;
-    },
-
-    isImmediateChild: function (elem, parentElem) {
-      var isCorrect = false;
-      if (this.isjQuery(elem)) {
-        throw new Error("elem needs to be a string for Grader.isImmediateChild()");
-      }
-      if (!this.isjQuery(parentElem)) {
-        parentElem = $(parentElem);
-      }
-      if (parentElem.children(elem).length > 0) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    hasParent: function (elem, parentElem) {
-      var isCorrect = false;
-      if (this.isjQuery(parentElem)) {
-        throw new Error("parentElem needs to be a string for Grader.hasParent()");
-      }
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.closest(parentElem).length > 0) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    sendResultsToExecutor: function () {
-      var output = {
-        isCorrect: false,
-        test_feedback: "",
-        test_comments: "",
-        congrats: ""
-      }
-      for (arg in arguments) {
-        var thisIsCorrect = arguments[arg].isCorrect;
-        var thisTestFeedback = arguments[arg].getFormattedWrongMessages();
-        var thisTestComment = arguments[arg].getFormattedComments();
-        if (typeof thisIsCorrect !== 'boolean') {
-          thisIsCorrect = false;
-        }
-
-        switch (arg) {
-          case '0':
-            output.congrats = arguments[arg];
-          case '1':
-            output.isCorrect = thisIsCorrect;
-            output.test_feedback = thisTestFeedback;
-            output.test_comments = thisTestComment;
-            break;
-          default:
-            output.isCorrect = thisIsCorrect && output.isCorrect;
-            if (output.test_feedback !== "") {
-              output.test_feedback = [output.test_feedback, thisTestFeedback].join('\n');
-            } else {
-              output.test_feedback = thisTestFeedback;
-            }
-
-            if (output.test_comments !== "") {
-              output.test_comments = [output.test_comments, thisTestFeedback].join('\n');
-            } else {
-              output.test_comments = thisTestComment;
-            }
-            break;
-        }
-      }
-      output = JSON.stringify(output);
-      console.info("UDACITY_RESULT:" + output);
-    }
-  }
-  return Grader;
-})();
-
-function performTesting() {
-  return {'result': 'noop'}
-}
-
-/**
- * JavaScript code to detect available availability of a
- * particular font in a browser using JavaScript and CSS.
- *
- * Author : Lalit Patel
- * Website: http://www.lalit.org/lab/javascript-css-font-detect/
- * License: Apache Software License 2.0
- *          http://www.apache.org/licenses/LICENSE-2.0
- * Version: 0.15 (21 Sep 2009)
- *          Changed comparision font to default from sans-default-default,
- *          as in FF3.0 font of child element didn't fallback
- *          to parent element if the font is missing.
- * Version: 0.2 (04 Mar 2012)
- *          Comparing font against all the 3 generic font families ie,
- *          'monospace', 'sans-serif' and 'sans'. If it doesn't match all 3
- *          then that font is 100% not available in the system
- * Version: 0.3 (24 Mar 2012)
- *          Replaced sans with serif in the list of baseFonts
- */
-
-var Detector = function() {
-    // a font will be compared against all the three default fonts.
-    // and if it doesn't match all 3 then that font is not available.
-    var baseFonts = ['monospace', 'sans-serif', 'serif'];
-
-    //we use m or w because these two characters take up the maximum width.
-    // And we use a LLi so that the same matching fonts can get separated
-    var testString = "mmmmmmmmmmlli";
-
-    //we test using 72px font size, we may use any size. I guess larger the better.
-    var testSize = '72px';
-
-    var h = document.getElementsByTagName("body")[0];
-
-    // create a SPAN in the document to get the width of the text we use to test
-    var s = document.createElement("span");
-    s.style.fontSize = testSize;
-    s.innerHTML = testString;
-    var defaultWidth = {};
-    var defaultHeight = {};
-    for (var index in baseFonts) {
-        //get the default width for the three base fonts
-        s.style.fontFamily = baseFonts[index];
-        h.appendChild(s);
-        defaultWidth[baseFonts[index]] = s.offsetWidth; //width for the default font
-        defaultHeight[baseFonts[index]] = s.offsetHeight; //height for the defualt font
-        h.removeChild(s);
-    }
-
-    function detect(font) {
-        var detected = false;
-        for (var index in baseFonts) {
-            s.style.fontFamily = font + ',' + baseFonts[index]; // name of the font along with the base font for fallback.
-            h.appendChild(s);
-            var matched = (s.offsetWidth != defaultWidth[baseFonts[index]] || s.offsetHeight != defaultHeight[baseFonts[index]]);
-            h.removeChild(s);
-            detected = detected || matched;
-        }
-        return detected;
-    }
-
-    this.detect = detect;
-};
-
-function detectFont(fonts) {
-  var detective = new Detector(), i;
-  for (i = 0; i < fonts.length; ++i) {
-    if (detective.detect(fonts[i]) !== true) {
-      continue
-    }
-    return fonts[i];
-  }
-}
-
-function performSubmission() {
-  var grader = new Grader({
-    // can add shared messages here
-  });
-
-  grader.addTest(function() {
-    return grader.hasCorrectText($('.udacity-text'), '^udacity$');
-  }, {
-    wrongMessage: "Did you change the text in the <h1></h1> tags?\nIf you want to capitalize \"udacity\" use CSS instead."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasCorrectStyle($('.udacity-text'), 'text-transform', 'uppercase');
-  }, {
-    wrongMessage: "\"udacity\" should be in ALL CAPS. Use the CSS property text-transform to change it."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasCorrectStyle($('.udacity-text'), 'text-decoration', 'underline');
-  }, {
-    wrongMessage: "The underline is missing. Check out the possible values for text-decoration."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasCorrectStyle($('.udacity-text'), 'color', 'rgb(128, 1, 255)');
-  }, {
-    wrongMessage: "The text should be colored purple. Use the hex value #8001ff."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasCorrectStyle($('.udacity-text'), 'font-size', '60px');
-  }, {
-    wrongMessage: "The font-size doesn't look quite right."
-  });
-
-  grader.addTest(function() {
-    return grader.propertyIsGreaterThan($('.udacity-text'), 'font-size', '59px');
-  }, {
-    wrongMessage: "Try increasing the font-size to 60px."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.propertyIsLessThan($('.udacity-text'), 'font-size', '61px');
-  }, {
-    wrongMessage: "Try decreasing the font-size to 60px."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasCorrectFont($('.udacity-text'), 'font-family', ['arial', 'Arial', 'helvetica', 'Helvetica', 'sans-serif', 'Sans-serif']);
-  }, {
-    wrongMessage: "The text is using the wrong font.\nCheck out websafe, sans-serif fonts like Arial or Helvetica."
-  });
-
-  grader.runTests();
-
-  result = {
-    is_correct: grader.isCorrect,
-    test_feedback: grader.getFormattedWrongMessages('\n'),
-    test_comments: grader.getFormattedComments('\n'),
-    congrats: "Perfect! There are a lot properties you can use to change font styles."
-  };
-  return result;
-};
\ No newline at end of file
diff --git a/lessons/L3/problem-set/03-style-the-font/text-solution-instructions.jpg b/lessons/L3/problem-set/03-style-the-font/text-solution-instructions.jpg
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diff --git a/lessons/L3/problem-set/03-style-the-font/text-solution.jpg b/lessons/L3/problem-set/03-style-the-font/text-solution.jpg
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diff --git a/lessons/L3/problem-set/03-style-the-font/text.jpg b/lessons/L3/problem-set/03-style-the-font/text.jpg
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diff --git a/lessons/L3/problem-set/04-udacity-feedback-chrome-extension/notes.md b/lessons/L3/problem-set/04-udacity-feedback-chrome-extension/notes.md
deleted file mode 100644
index 325484489..000000000
--- a/lessons/L3/problem-set/04-udacity-feedback-chrome-extension/notes.md
+++ /dev/null
@@ -1,19 +0,0 @@
-If you haven't already, install the Udacity Feedback Chrome Extension. You'll need it for the next quiz.
-
-### How to Load the Extension
-
-**1. Install the [Udacity Feedback Chrome Extension from the Chrome Web Store](https://chrome.google.com/webstore/detail/udacity-front-end-feedbac/melpgahbngpgnbhhccnopmlmpbmdaeoi) (it's free).**
-
-**2. Go to the Chrome extensions menu (chrome://extensions) and give the extension permission to run against file URLs.**
-
-![click this checkbox in the chrome extensions menu that says "allow access to file urls"](//lh3.googleusercontent.com/3NpKWtS41VwZdDkhfeu_3WfBC-of1uU11IgNjdkDwZODi9pQneBbk0PvHRSct5KseHGUPC-wUlIUIfk9FTKZ=s0#w=1450&h=258)
-
-**3. To use the extension, open the webpage you want to edit, click on the extension icon, and check "Allow feedback on this domain":**
-
-![open the extension and click "allow feedback on this domain"](//lh3.googleusercontent.com/GPFSlZ9i28R88S7Pk3f7aaGOHVfU1CN1IDziG8Y3nivfoAKOTPbM6NXjW9-DhEm19ud1VX9DM8f4MNSW5a0=s0#w=1827&h=531)
-
-**4. As edits are made, changes are reflected in the Udacity Feedback dialogue box.** 😃
-
----
-
-Interested in learning more about the extension? [Click here](http://labs.udacity.com/udacity-feedback-extension/) for a walkthrough and more information!
\ No newline at end of file
diff --git a/lessons/L3/problem-set/05-writing-selectors/answer.md b/lessons/L3/problem-set/05-writing-selectors/answer.md
deleted file mode 100644
index bad47f118..000000000
--- a/lessons/L3/problem-set/05-writing-selectors/answer.md
+++ /dev/null
@@ -1,66 +0,0 @@
-Here's the complete solution:
-
-```html
-<!DOCTYPE html>
-<html>
-<head>
-  <title>Writing Selectors Quiz</title>
-  <style>
-    #menu {
-      text-align: center;
-    }
-    .item {
-      color: red;
-    }
-    .picture {
-      border-radius: 5px;
-    }
-    .description {
-      font-style: italic;
-    }
-  </style>
-</head>
-<body>
-  <div id="menu">
-    <h1 class="item">Chicken Clay Pot</h1>
-    <img src="img/clay-pot.jpg" alt="clay pot" class="picture">
-    <p class="description">Crispy rice baked in clay pot topped with chicken and vegetables</p>
-  </div>
-</body>
-</html>
-```
-
-If you analyze the HTML, you should be able to tell that this webpage is a menu (or the beginnings of one 😎). The div element represents the menu, and inside the menu you see an item, picture, and description.
-
-    <div id="menu">
-        <h1 class="item">Chicken Clay Pot</h1>
-        <img src="img/clay-pot.jpg" alt="clay pot" class="picture">
-        <p class="description">Crispy rice baked in clay pot topped with chicken and vegetables</p>
-    </div>
-
-To style this, I added the missing selectors to the CSS.
-
-```css
-#menu {
-  text-align: center;
-}
-.item {
-  color: red;
-}
-.picture {
-  border-radius: 5px;
-}
-.description {
-  font-style: italic;
-}
-```
-
-Notice how the first selector uses a `#` sign, but the other three selectors use a `.`
-
-That's because menu is an **id attribute** and item, picture, and description are **class attributes**.
-
-As you continue through this nanodegree, remember that id selectors always begin with the pound/hashtag symbol followed by the id name and class selectors always begin with the dot/period symbol followed by the class name.
-
-This is how the answer looks in the browser:
-
-![css selectors solution](http://udacity.github.io/fend/lessons/L3/problem-set/05-writing-selectors/clay-pot-solution-browser.png)
\ No newline at end of file
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diff --git a/lessons/L3/problem-set/05-writing-selectors/css-statement.png b/lessons/L3/problem-set/05-writing-selectors/css-statement.png
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diff --git a/lessons/L3/problem-set/05-writing-selectors/index.html b/lessons/L3/problem-set/05-writing-selectors/index.html
deleted file mode 100644
index 14d773477..000000000
--- a/lessons/L3/problem-set/05-writing-selectors/index.html
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<title>Writing Selectors Quiz</title>
-	<!-- the next line loads the tests for the Udacity Feedback extension -->
-	<meta name="udacity-grader" content="tests.json">
-	<style>
-		/* missing id */ {
-			text-align: center;
-		}
-		/* missing class */ {
-			color: red;
-		}
-		/* missing class */ {
-			border-radius: 5px;
-		}
-		/* missing class */ {
-			font-style: italic;
-		}
-	</style>
-</head>
-<body>
-	<div id="menu">
-		<h1 class="item">Chicken Clay Pot</h1>
-		<img src="img/clay-pot.jpg" alt="clay pot" class="picture">
-		<p class="description">Crispy rice baked in clay pot topped with chicken and vegetables</p>
-	</div>
-</body>
-</html>
diff --git a/lessons/L3/problem-set/05-writing-selectors/instructions.md b/lessons/L3/problem-set/05-writing-selectors/instructions.md
deleted file mode 100644
index 02448b74a..000000000
--- a/lessons/L3/problem-set/05-writing-selectors/instructions.md
+++ /dev/null
@@ -1,8 +0,0 @@
-### How to Complete this Quiz
-
-1. Download the zip file called `writing-selectors.zip` from the resources section or from [here](http://udacity.github.io/fend/lessons/L3/problem-set/05-writing-selectors/writing-selectors.zip).
-2. Open `index.html` and turn on the [Udacity Feedback Chrome Extension](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345403/modules/742847927175460/lessons/7323812069/concepts/73256617910923).
-3. Edit `index.html` and add the missing id and class selectors within the `<style>` tags (alternatively, you can use Developer Tools to add the missing id and class selectors to pass all the tests).
-4. When you've successfully added the correct selectors, copy and paste the code that appears into the next page to finish!
-
-When you're ready to get started, click "Skip to Quiz".
\ No newline at end of file
diff --git a/lessons/L3/problem-set/05-writing-selectors/question.md b/lessons/L3/problem-set/05-writing-selectors/question.md
deleted file mode 100644
index 95366a472..000000000
--- a/lessons/L3/problem-set/05-writing-selectors/question.md
+++ /dev/null
@@ -1,34 +0,0 @@
-At this point, you should be familiar with the basic structure of a CSS statement. Every CSS statement is made up of a **selector** and a **declaration block**. The selector tells the browser what HTML we to style and the declaration block tells the browser what styles need to be applied to that HTML.
-
-![css statement](http://udacity.github.io/fend/lessons/L3/problem-set/05-writing-selectors/css-statement.png)
-
-_The basic structure of a CSS statement_
-
-For this quiz, I want you to focus exclusively on the selector part of a CSS statement. To do this, I've created a webpage that is lacking style. The webpage already has ids and classes added to the HTML, but it's missing the right selectors to add the style.
-
-```html
-<div id="menu">
-  <h1 class="item">Chicken Clay Pot</h1>
-  <img src="img/clay-pot.jpg" alt="clay pot" class="picture">
-  <p class="description">Crispy rice baked in clay pot topped with chicken and vegetables</p>
-</div>
-```
-
-```css
-/* missing id */ {
-  text-align: center;
-}
-/* missing class */ {
-  color: red;
-}
-/* missing class */ {
-  border-radius: 5px;
-}
-/* missing class */ {
-  font-style: italic;
-}
-```
-
-It's your job to download the webpage and fill-in the missing selectors. If you do it right, your webpage should end up looking like this...
-
-![writing selectors solution](http://udacity.github.io/fend/lessons/L3/problem-set/05-writing-selectors/clay-pot-solution.jpg)
\ No newline at end of file
diff --git a/lessons/L3/problem-set/05-writing-selectors/tests.json b/lessons/L3/problem-set/05-writing-selectors/tests.json
deleted file mode 100644
index 58798fd25..000000000
--- a/lessons/L3/problem-set/05-writing-selectors/tests.json
+++ /dev/null
@@ -1,38 +0,0 @@
-[{
-  "name" : "Writing Selectors",
-  "code" : "andtheSELECTIONis",
-  "tests" : [
-    {
-      "description" : "Add id selector to style menu.",
-      "definition" : {
-        "nodes" : "#menu",
-        "cssProperty" : "text-align",
-        "equals" : "center"
-      }
-    },
-    {
-      "description" : "Add class selector to style item.",
-      "definition" : {
-        "nodes" : ".item",
-        "cssProperty" : "color",
-        "equals" : "rgb(255, 0, 0)"
-      }
-    },
-    {
-      "description" : "Add class selector to style picture.",
-      "definition" : {
-        "nodes" : ".picture",
-        "cssProperty" : "border-radius",
-        "equals" : "5px"
-      }
-    },
-    {
-      "description" : "Add class selector to style description.",
-      "definition" : {
-        "nodes" : ".description",
-        "cssProperty" : "font-style",
-        "equals" : "italic"
-      }
-    }
-  ]
-}]
\ No newline at end of file
diff --git a/lessons/L3/problem-set/05-writing-selectors/writing-selectors.zip b/lessons/L3/problem-set/05-writing-selectors/writing-selectors.zip
deleted file mode 100644
index eeab639e7..000000000
Binary files a/lessons/L3/problem-set/05-writing-selectors/writing-selectors.zip and /dev/null differ
diff --git a/lessons/L3/problem-set/06-using-attributes/answer.html b/lessons/L3/problem-set/06-using-attributes/answer.html
deleted file mode 100644
index 26cf03f71..000000000
--- a/lessons/L3/problem-set/06-using-attributes/answer.html
+++ /dev/null
@@ -1,64 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Using the provided HTML and CSS, add the correct attributes to the HTML to replicate the same webpage pictured below. -->
-
-<html>
-<head>
-    <meta charset="utf-8">
-    <title>Using Attributes Quiz</title>
-    <style>
-        body {
-            font-family: Arial;
-        }
-        #to-do-list {
-            width: 400px;
-            background: #2e3d49;
-            padding: 10px 20px;
-        }
-        .title {
-            color: #fff;
-        }
-        .underline {
-            text-decoration: underline;
-        }
-        .list {
-            list-style-type: circle;
-            text-align: left;
-            font-size: 16px;
-            color: #1fba58;
-            line-height: 24px;
-        }
-        .finished {
-            color: #f4442f;
-            text-decoration: line-through;
-        }
-    </style>
-</head>
-<body>
-    <div id="to-do-list">
-        <h1 class="title">My To-Do List</h1>
-        <h2 class="title underline">Chores</h2>
-        <ul class="list">
-            <li>load the diswasher</li>
-            <li>vacuum living room</li>
-            <li>take out garbage</li>
-            <li class="finished">sweep the garage</li>
-        </ul>
-        <h2 class="title underline">Homework</h2>
-        <ul class="list">
-            <li class="finished">brainstorm ideas for Science project</li>
-            <li class="finished">finish Calculus 2 problems</li>
-            <li>study for Programming midterm :P</li>
-            <li>finish Project 0 on Udacity FEND</li>
-            <li class="finished">find sources for Biology research paper</li>
-            <li>read first two chapters of The Art of War</li>
-        </ul>
-        <h2 class="title underline">Party</h2>
-        <ul class="list">
-            <li class="finished">send out invitations</li>
-            <li>reserve party room at restaurant</li>
-            <li>order the cake!</li>
-        </ul>
-    </div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/problem-set/06-using-attributes/answer.md b/lessons/L3/problem-set/06-using-attributes/answer.md
deleted file mode 100644
index 3f60b7bd3..000000000
--- a/lessons/L3/problem-set/06-using-attributes/answer.md
+++ /dev/null
@@ -1,71 +0,0 @@
-Here's my solution:
-
-```html
-<!DOCTYPE html>
-<html>
-<head>
-  <!-- ... -->
-</head>
-<body>
-  <div id="to-do-list">
-    <h1 class="title">My To-Do List</h1>
-    <h2 class="title underline">Chores</h2>
-    <ul class="list">
-      <li>load the diswasher</li>
-      <li>vacuum living room</li>
-      <li>take out garbage</li>
-      <li class="finished">sweep the garage</li>
-    </ul>
-    <h2 class="title underline">Homework</h2>
-    <ul class="list">
-      <li class="finished">brainstorm ideas for Science project</li>
-      <li class="finished">finish Calculus 2 problems</li>
-      <li>study for Programming midterm :P</li>
-      <li>finish Project 0 on Udacity FEND</li>
-      <li class="finished">find sources for Biology research paper</li>
-      <li>read first two chapters of The Art of War</li>
-    </ul>
-    <h2 class="title underline">Party</h2>
-    <ul class="list">
-      <li class="finished">send out invitations</li>
-      <li>reserve party room at restaurant</li>
-      <li>order the cake!</li>
-    </ul>
-  </div>
-</body>
-</html>
-```
-
-I started first by adding the id `to-do-list`. Because ids are used to select **unique** elements, there was really only two places where it could added: `<body>` or `<div>`. Using a little trial and error, I was able to determine that `to-do-list` should be added to the `<div>`. After adding `<div id="to-do-list">`, my page looked like the image below.
-
-![to-do list part 1](http://udacity.github.io/fend/lessons/L3/problem-set/06-using-attributes/to-do-list-1.jpg)
-
-Next, I turned my attention to headings. In the final solution, the headings are white and underlined; except for the `<h1>` that reads "My To-Do List". Conveniently, the CSS had classes `title` and `underline` that could be used to create both of those styles.
-
-To add to styles, I simply added the class `title` to each heading and added the class `underline` to only the `<h2>` tags, since the `<h1>` tag didn't need it.
-
-```html
-<div id="to-do-list">
-  <h1 class="title">My To-Do List</h1>
-  <h2 class="title underline">Chores</h2>
-  <!-- ... -->
-  <h2 class="title underline">Homework</h2>
-  <!-- ... -->
-  <h2 class="title underline">Party</h2>
-  <!-- ... -->
-</div>
-```
-
-I want you to pay attention to how the `<h2>` tags have both the `title` and `underline` class. Remember, you can add as many as classes as you want to your HTML, and you can reuse them. This is why it is recommended and preferred to use classes over ids when adding style to your websites.
-
-Also, notice how the names of the classes are reflective of their purpose. It's really important that you give ids and classes **meaningful names**. Otherwise, it will make it extremely difficult for you or others to review your code; especially after a long period of time.
-
-After this, my solution looked like the following.
-
-![to-do list part 2](http://udacity.github.io/fend/lessons/L3/problem-set/06-using-attributes/to-do-list-2.jpg)
-
-At this point, the only thing left to-do (no pun intended) was to mark out some of the tasks left on the to-do list. This part was fairly simple because some of the tasks had already been marked out using the class `finished`. So, I just leveraged the same class to mark out the tasks "brainstorm ideas for Science project", "finish Calculus 2 problems", and "send out invitations".
-
-Here's the before and after:
-
-![to-do list solution](http://udacity.github.io/fend/lessons/L3/problem-set/06-using-attributes/solution.gif)
\ No newline at end of file
diff --git a/lessons/L3/problem-set/06-using-attributes/instructions.md b/lessons/L3/problem-set/06-using-attributes/instructions.md
deleted file mode 100644
index 75468a1be..000000000
--- a/lessons/L3/problem-set/06-using-attributes/instructions.md
+++ /dev/null
@@ -1,6 +0,0 @@
-### How to Complete this Quiz
-
-1. Edit `index.html` in the Udacity classroom to reproduce the [solution image](http://udacity.github.io/fend/lessons/L3/problem-set/06-using-attributes/to-do-list-solution.jpg).
-2. You will need to add the correct **id** and **class** attributes to the HTML elements to reproduce solution image.
-
-When you're ready to get started, click "Skip to Quiz".
\ No newline at end of file
diff --git a/lessons/L3/problem-set/06-using-attributes/question.html b/lessons/L3/problem-set/06-using-attributes/question.html
deleted file mode 100644
index 2ed4f6b38..000000000
--- a/lessons/L3/problem-set/06-using-attributes/question.html
+++ /dev/null
@@ -1,64 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Using the provided HTML and CSS, add the correct attributes to the HTML to replicate the same webpage pictured below. -->
-
-<html>
-<head>
-	<meta charset="utf-8">
-	<title>Using Attributes Quiz</title>
-	<style>
-        body {
-            font-family: Arial;
-        }
-        #to-do-list {
-            width: 400px;
-            background: #2e3d49;
-            padding: 10px 20px;
-        }
-        .title {
-            color: #fff;
-        }
-        .underline {
-            text-decoration: underline;
-        }
-        .list {
-            list-style-type: circle;
-            text-align: left;
-            font-size: 16px;
-            color: #1fba58;
-            line-height: 24px;
-        }
-        .finished {
-            color: #f4442f;
-            text-decoration: line-through;
-        }
-	</style>
-</head>
-<body>
-	<div>
-		<h1>My To-Do List</h1>
-		<h2>Chores</h2>
-		<ul class="list">
-			<li>load the diswasher</li>
-			<li>vacuum living room</li>
-			<li>take out garbage</li>
-			<li class="finished">sweep the garage</li>
-		</ul>
-		<h2>Homework</h2>
-		<ul class="list">
-			<li>brainstorm ideas for Science project</li>
-			<li>finish Calculus 2 problems</li>
-			<li>study for Programming midterm :P</li>
-            <li>finish Project 0 on Udacity FEND</li>
-			<li class="finished">find sources for Biology research paper</li>
-			<li>read first two chapters of The Art of War</li>
-		</ul>
-        <h2>Party</h2>
-        <ul class="list">
-            <li>send out invitations</li>
-            <li>reserve party room at restaurant</li>
-            <li>order the cake!</li>
-        </ul>
-	</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L3/problem-set/06-using-attributes/question.md b/lessons/L3/problem-set/06-using-attributes/question.md
deleted file mode 100644
index 7249f8c70..000000000
--- a/lessons/L3/problem-set/06-using-attributes/question.md
+++ /dev/null
@@ -1,16 +0,0 @@
-Using selectors is the fastest and most efficient way to add style to your HTML. At this point, you've only practiced using **tag**, **id**, and **class** selectors, but there are actually other types of selectors. If you want to read ahead, check out the following links.
-
-- [MDN's Selectors](https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Getting_started/Selectors "Selectors")
-- [How CSS Selectors Work](https://css-tricks.com/how-css-selectors-work/ "How CSS Selectors Work")
-
-We'll explore these more in later lessons.
-
-Now it's time to put your knowledge of **attributes** to the test. For this quiz, I've created you a simple to-do list in HTML and written the CSS to make it stylized 😃 .
-
-![to-do list](http://udacity.github.io/fend/lessons/L3/problem-set/06-using-attributes/to-do-list.jpg)
-
-_Haven't you already finished project 0 for FEND?_
-
-However, in the HTML you'll see that some **id** and **class** attributes are missing from the HTML. To complete the quiz, add the correct **id** and **class** attributes to the HTML to reproduce the to-do list below.
-
-![to-do list solution](http://udacity.github.io/fend/lessons/L3/problem-set/06-using-attributes/to-do-list-solution.jpg)
\ No newline at end of file
diff --git a/lessons/L3/problem-set/06-using-attributes/solution.gif b/lessons/L3/problem-set/06-using-attributes/solution.gif
deleted file mode 100644
index f25eace8b..000000000
Binary files a/lessons/L3/problem-set/06-using-attributes/solution.gif and /dev/null differ
diff --git a/lessons/L3/problem-set/06-using-attributes/tests.js b/lessons/L3/problem-set/06-using-attributes/tests.js
deleted file mode 100644
index 01c074638..000000000
--- a/lessons/L3/problem-set/06-using-attributes/tests.js
+++ /dev/null
@@ -1,749 +0,0 @@
-var Grader = (function() {
-
-  /*!
-   * @overview es6-promise - a tiny implementation of Promises/A+.
-   * @copyright Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors (Conversion to ES6 API by Jake Archibald)
-   * @license   Licensed under MIT license
-   *            See https://raw.githubusercontent.com/jakearchibald/es6-promise/master/LICENSE
-   * @version   3.0.2
-   */
-  if (!Promise) {
-    (function(){"use strict";function lib$es6$promise$utils$$objectOrFunction(x){return typeof x==="function"||typeof x==="object"&&x!==null}function lib$es6$promise$utils$$isFunction(x){return typeof x==="function"}function lib$es6$promise$utils$$isMaybeThenable(x){return typeof x==="object"&&x!==null}var lib$es6$promise$utils$$_isArray;if(!Array.isArray){lib$es6$promise$utils$$_isArray=function(x){return Object.prototype.toString.call(x)==="[object Array]"}}else{lib$es6$promise$utils$$_isArray=Array.isArray}var lib$es6$promise$utils$$isArray=lib$es6$promise$utils$$_isArray;var lib$es6$promise$asap$$len=0;var lib$es6$promise$asap$$toString={}.toString;var lib$es6$promise$asap$$vertxNext;var lib$es6$promise$asap$$customSchedulerFn;var lib$es6$promise$asap$$asap=function asap(callback,arg){lib$es6$promise$asap$$queue[lib$es6$promise$asap$$len]=callback;lib$es6$promise$asap$$queue[lib$es6$promise$asap$$len+1]=arg;lib$es6$promise$asap$$len+=2;if(lib$es6$promise$asap$$len===2){if(lib$es6$promise$asap$$customSchedulerFn){lib$es6$promise$asap$$customSchedulerFn(lib$es6$promise$asap$$flush)}else{lib$es6$promise$asap$$scheduleFlush()}}};function lib$es6$promise$asap$$setScheduler(scheduleFn){lib$es6$promise$asap$$customSchedulerFn=scheduleFn}function lib$es6$promise$asap$$setAsap(asapFn){lib$es6$promise$asap$$asap=asapFn}var lib$es6$promise$asap$$browserWindow=typeof window!=="undefined"?window:undefined;var lib$es6$promise$asap$$browserGlobal=lib$es6$promise$asap$$browserWindow||{};var lib$es6$promise$asap$$BrowserMutationObserver=lib$es6$promise$asap$$browserGlobal.MutationObserver||lib$es6$promise$asap$$browserGlobal.WebKitMutationObserver;var lib$es6$promise$asap$$isNode=typeof process!=="undefined"&&{}.toString.call(process)==="[object process]";var lib$es6$promise$asap$$isWorker=typeof Uint8ClampedArray!=="undefined"&&typeof importScripts!=="undefined"&&typeof MessageChannel!=="undefined";function lib$es6$promise$asap$$useNextTick(){return function(){process.nextTick(lib$es6$promise$asap$$flush)}}function lib$es6$promise$asap$$useVertxTimer(){return function(){lib$es6$promise$asap$$vertxNext(lib$es6$promise$asap$$flush)}}function lib$es6$promise$asap$$useMutationObserver(){var iterations=0;var observer=new lib$es6$promise$asap$$BrowserMutationObserver(lib$es6$promise$asap$$flush);var node=document.createTextNode("");observer.observe(node,{characterData:true});return function(){node.data=iterations=++iterations%2}}function lib$es6$promise$asap$$useMessageChannel(){var channel=new MessageChannel;channel.port1.onmessage=lib$es6$promise$asap$$flush;return function(){channel.port2.postMessage(0)}}function lib$es6$promise$asap$$useSetTimeout(){return function(){setTimeout(lib$es6$promise$asap$$flush,1)}}var lib$es6$promise$asap$$queue=new Array(1e3);function lib$es6$promise$asap$$flush(){for(var i=0;i<lib$es6$promise$asap$$len;i+=2){var callback=lib$es6$promise$asap$$queue[i];var arg=lib$es6$promise$asap$$queue[i+1];callback(arg);lib$es6$promise$asap$$queue[i]=undefined;lib$es6$promise$asap$$queue[i+1]=undefined}lib$es6$promise$asap$$len=0}function lib$es6$promise$asap$$attemptVertx(){try{var r=require;var vertx=r("vertx");lib$es6$promise$asap$$vertxNext=vertx.runOnLoop||vertx.runOnContext;return lib$es6$promise$asap$$useVertxTimer()}catch(e){return lib$es6$promise$asap$$useSetTimeout()}}var lib$es6$promise$asap$$scheduleFlush;if(lib$es6$promise$asap$$isNode){lib$es6$promise$asap$$scheduleFlush=lib$es6$promise$asap$$useNextTick()}else if(lib$es6$promise$asap$$BrowserMutationObserver){lib$es6$promise$asap$$scheduleFlush=lib$es6$promise$asap$$useMutationObserver()}else if(lib$es6$promise$asap$$isWorker){lib$es6$promise$asap$$scheduleFlush=lib$es6$promise$asap$$useMessageChannel()}else if(lib$es6$promise$asap$$browserWindow===undefined&&typeof require==="function"){lib$es6$promise$asap$$scheduleFlush=lib$es6$promise$asap$$attemptVertx()}else{lib$es6$promise$asap$$scheduleFlush=lib$es6$promise$asap$$useSetTimeout()}function lib$es6$promise$$internal$$noop(){}var lib$es6$promise$$internal$$PENDING=void 0;var lib$es6$promise$$internal$$FULFILLED=1;var lib$es6$promise$$internal$$REJECTED=2;var lib$es6$promise$$internal$$GET_THEN_ERROR=new lib$es6$promise$$internal$$ErrorObject;function lib$es6$promise$$internal$$selfFulfillment(){return new TypeError("You cannot resolve a promise with itself")}function lib$es6$promise$$internal$$cannotReturnOwn(){return new TypeError("A promises callback cannot return that same promise.")}function lib$es6$promise$$internal$$getThen(promise){try{return promise.then}catch(error){lib$es6$promise$$internal$$GET_THEN_ERROR.error=error;return lib$es6$promise$$internal$$GET_THEN_ERROR}}function lib$es6$promise$$internal$$tryThen(then,value,fulfillmentHandler,rejectionHandler){try{then.call(value,fulfillmentHandler,rejectionHandler)}catch(e){return e}}function lib$es6$promise$$internal$$handleForeignThenable(promise,thenable,then){lib$es6$promise$asap$$asap(function(promise){var sealed=false;var error=lib$es6$promise$$internal$$tryThen(then,thenable,function(value){if(sealed){return}sealed=true;if(thenable!==value){lib$es6$promise$$internal$$resolve(promise,value)}else{lib$es6$promise$$internal$$fulfill(promise,value)}},function(reason){if(sealed){return}sealed=true;lib$es6$promise$$internal$$reject(promise,reason)},"Settle: "+(promise._label||" unknown promise"));if(!sealed&&error){sealed=true;lib$es6$promise$$internal$$reject(promise,error)}},promise)}function lib$es6$promise$$internal$$handleOwnThenable(promise,thenable){if(thenable._state===lib$es6$promise$$internal$$FULFILLED){lib$es6$promise$$internal$$fulfill(promise,thenable._result)}else if(thenable._state===lib$es6$promise$$internal$$REJECTED){lib$es6$promise$$internal$$reject(promise,thenable._result)}else{lib$es6$promise$$internal$$subscribe(thenable,undefined,function(value){lib$es6$promise$$internal$$resolve(promise,value)},function(reason){lib$es6$promise$$internal$$reject(promise,reason)})}}function lib$es6$promise$$internal$$handleMaybeThenable(promise,maybeThenable){if(maybeThenable.constructor===promise.constructor){lib$es6$promise$$internal$$handleOwnThenable(promise,maybeThenable)}else{var then=lib$es6$promise$$internal$$getThen(maybeThenable);if(then===lib$es6$promise$$internal$$GET_THEN_ERROR){lib$es6$promise$$internal$$reject(promise,lib$es6$promise$$internal$$GET_THEN_ERROR.error)}else if(then===undefined){lib$es6$promise$$internal$$fulfill(promise,maybeThenable)}else if(lib$es6$promise$utils$$isFunction(then)){lib$es6$promise$$internal$$handleForeignThenable(promise,maybeThenable,then)}else{lib$es6$promise$$internal$$fulfill(promise,maybeThenable)}}}function lib$es6$promise$$internal$$resolve(promise,value){if(promise===value){lib$es6$promise$$internal$$reject(promise,lib$es6$promise$$internal$$selfFulfillment())}else if(lib$es6$promise$utils$$objectOrFunction(value)){lib$es6$promise$$internal$$handleMaybeThenable(promise,value)}else{lib$es6$promise$$internal$$fulfill(promise,value)}}function lib$es6$promise$$internal$$publishRejection(promise){if(promise._onerror){promise._onerror(promise._result)}lib$es6$promise$$internal$$publish(promise)}function lib$es6$promise$$internal$$fulfill(promise,value){if(promise._state!==lib$es6$promise$$internal$$PENDING){return}promise._result=value;promise._state=lib$es6$promise$$internal$$FULFILLED;if(promise._subscribers.length!==0){lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish,promise)}}function lib$es6$promise$$internal$$reject(promise,reason){if(promise._state!==lib$es6$promise$$internal$$PENDING){return}promise._state=lib$es6$promise$$internal$$REJECTED;promise._result=reason;lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publishRejection,promise)}function lib$es6$promise$$internal$$subscribe(parent,child,onFulfillment,onRejection){var subscribers=parent._subscribers;var length=subscribers.length;parent._onerror=null;subscribers[length]=child;subscribers[length+lib$es6$promise$$internal$$FULFILLED]=onFulfillment;subscribers[length+lib$es6$promise$$internal$$REJECTED]=onRejection;if(length===0&&parent._state){lib$es6$promise$asap$$asap(lib$es6$promise$$internal$$publish,parent)}}function lib$es6$promise$$internal$$publish(promise){var subscribers=promise._subscribers;var settled=promise._state;if(subscribers.length===0){return}var child,callback,detail=promise._result;for(var i=0;i<subscribers.length;i+=3){child=subscribers[i];callback=subscribers[i+settled];if(child){lib$es6$promise$$internal$$invokeCallback(settled,child,callback,detail)}else{callback(detail)}}promise._subscribers.length=0}function lib$es6$promise$$internal$$ErrorObject(){this.error=null}var lib$es6$promise$$internal$$TRY_CATCH_ERROR=new lib$es6$promise$$internal$$ErrorObject;function lib$es6$promise$$internal$$tryCatch(callback,detail){try{return callback(detail)}catch(e){lib$es6$promise$$internal$$TRY_CATCH_ERROR.error=e;return lib$es6$promise$$internal$$TRY_CATCH_ERROR}}function lib$es6$promise$$internal$$invokeCallback(settled,promise,callback,detail){var hasCallback=lib$es6$promise$utils$$isFunction(callback),value,error,succeeded,failed;if(hasCallback){value=lib$es6$promise$$internal$$tryCatch(callback,detail);if(value===lib$es6$promise$$internal$$TRY_CATCH_ERROR){failed=true;error=value.error;value=null}else{succeeded=true}if(promise===value){lib$es6$promise$$internal$$reject(promise,lib$es6$promise$$internal$$cannotReturnOwn());return}}else{value=detail;succeeded=true}if(promise._state!==lib$es6$promise$$internal$$PENDING){}else if(hasCallback&&succeeded){lib$es6$promise$$internal$$resolve(promise,value)}else if(failed){lib$es6$promise$$internal$$reject(promise,error)}else if(settled===lib$es6$promise$$internal$$FULFILLED){lib$es6$promise$$internal$$fulfill(promise,value)}else if(settled===lib$es6$promise$$internal$$REJECTED){lib$es6$promise$$internal$$reject(promise,value)}}function lib$es6$promise$$internal$$initializePromise(promise,resolver){try{resolver(function resolvePromise(value){lib$es6$promise$$internal$$resolve(promise,value)},function rejectPromise(reason){lib$es6$promise$$internal$$reject(promise,reason)})}catch(e){lib$es6$promise$$internal$$reject(promise,e)}}function lib$es6$promise$enumerator$$Enumerator(Constructor,input){var enumerator=this;enumerator._instanceConstructor=Constructor;enumerator.promise=new Constructor(lib$es6$promise$$internal$$noop);if(enumerator._validateInput(input)){enumerator._input=input;enumerator.length=input.length;enumerator._remaining=input.length;enumerator._init();if(enumerator.length===0){lib$es6$promise$$internal$$fulfill(enumerator.promise,enumerator._result)}else{enumerator.length=enumerator.length||0;enumerator._enumerate();if(enumerator._remaining===0){lib$es6$promise$$internal$$fulfill(enumerator.promise,enumerator._result)}}}else{lib$es6$promise$$internal$$reject(enumerator.promise,enumerator._validationError())}}lib$es6$promise$enumerator$$Enumerator.prototype._validateInput=function(input){return lib$es6$promise$utils$$isArray(input)};lib$es6$promise$enumerator$$Enumerator.prototype._validationError=function(){return new Error("Array Methods must be provided an Array")};lib$es6$promise$enumerator$$Enumerator.prototype._init=function(){this._result=new Array(this.length)};var lib$es6$promise$enumerator$$default=lib$es6$promise$enumerator$$Enumerator;lib$es6$promise$enumerator$$Enumerator.prototype._enumerate=function(){var enumerator=this;var length=enumerator.length;var promise=enumerator.promise;var input=enumerator._input;for(var i=0;promise._state===lib$es6$promise$$internal$$PENDING&&i<length;i++){enumerator._eachEntry(input[i],i)}};lib$es6$promise$enumerator$$Enumerator.prototype._eachEntry=function(entry,i){var enumerator=this;var c=enumerator._instanceConstructor;if(lib$es6$promise$utils$$isMaybeThenable(entry)){if(entry.constructor===c&&entry._state!==lib$es6$promise$$internal$$PENDING){entry._onerror=null;enumerator._settledAt(entry._state,i,entry._result)}else{enumerator._willSettleAt(c.resolve(entry),i)}}else{enumerator._remaining--;enumerator._result[i]=entry}};lib$es6$promise$enumerator$$Enumerator.prototype._settledAt=function(state,i,value){var enumerator=this;var promise=enumerator.promise;if(promise._state===lib$es6$promise$$internal$$PENDING){enumerator._remaining--;if(state===lib$es6$promise$$internal$$REJECTED){lib$es6$promise$$internal$$reject(promise,value)}else{enumerator._result[i]=value}}if(enumerator._remaining===0){lib$es6$promise$$internal$$fulfill(promise,enumerator._result)}};lib$es6$promise$enumerator$$Enumerator.prototype._willSettleAt=function(promise,i){var enumerator=this;lib$es6$promise$$internal$$subscribe(promise,undefined,function(value){enumerator._settledAt(lib$es6$promise$$internal$$FULFILLED,i,value)},function(reason){enumerator._settledAt(lib$es6$promise$$internal$$REJECTED,i,reason)})};function lib$es6$promise$promise$all$$all(entries){return new lib$es6$promise$enumerator$$default(this,entries).promise}var lib$es6$promise$promise$all$$default=lib$es6$promise$promise$all$$all;function lib$es6$promise$promise$race$$race(entries){var Constructor=this;var promise=new Constructor(lib$es6$promise$$internal$$noop);if(!lib$es6$promise$utils$$isArray(entries)){lib$es6$promise$$internal$$reject(promise,new TypeError("You must pass an array to race."));return promise}var length=entries.length;function onFulfillment(value){lib$es6$promise$$internal$$resolve(promise,value)}function onRejection(reason){lib$es6$promise$$internal$$reject(promise,reason)}for(var i=0;promise._state===lib$es6$promise$$internal$$PENDING&&i<length;i++){lib$es6$promise$$internal$$subscribe(Constructor.resolve(entries[i]),undefined,onFulfillment,onRejection)}return promise}var lib$es6$promise$promise$race$$default=lib$es6$promise$promise$race$$race;function lib$es6$promise$promise$resolve$$resolve(object){var Constructor=this;if(object&&typeof object==="object"&&object.constructor===Constructor){return object}var promise=new Constructor(lib$es6$promise$$internal$$noop);lib$es6$promise$$internal$$resolve(promise,object);return promise}var lib$es6$promise$promise$resolve$$default=lib$es6$promise$promise$resolve$$resolve;function lib$es6$promise$promise$reject$$reject(reason){var Constructor=this;var promise=new Constructor(lib$es6$promise$$internal$$noop);lib$es6$promise$$internal$$reject(promise,reason);return promise}var lib$es6$promise$promise$reject$$default=lib$es6$promise$promise$reject$$reject;var lib$es6$promise$promise$$counter=0;function lib$es6$promise$promise$$needsResolver(){throw new TypeError("You must pass a resolver function as the first argument to the promise constructor")}function lib$es6$promise$promise$$needsNew(){throw new TypeError("Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.")}var lib$es6$promise$promise$$default=lib$es6$promise$promise$$Promise;function lib$es6$promise$promise$$Promise(resolver){this._id=lib$es6$promise$promise$$counter++;this._state=undefined;this._result=undefined;this._subscribers=[];if(lib$es6$promise$$internal$$noop!==resolver){if(!lib$es6$promise$utils$$isFunction(resolver)){lib$es6$promise$promise$$needsResolver()}if(!(this instanceof lib$es6$promise$promise$$Promise)){lib$es6$promise$promise$$needsNew()}lib$es6$promise$$internal$$initializePromise(this,resolver)}}lib$es6$promise$promise$$Promise.all=lib$es6$promise$promise$all$$default;lib$es6$promise$promise$$Promise.race=lib$es6$promise$promise$race$$default;lib$es6$promise$promise$$Promise.resolve=lib$es6$promise$promise$resolve$$default;lib$es6$promise$promise$$Promise.reject=lib$es6$promise$promise$reject$$default;lib$es6$promise$promise$$Promise._setScheduler=lib$es6$promise$asap$$setScheduler;lib$es6$promise$promise$$Promise._setAsap=lib$es6$promise$asap$$setAsap;lib$es6$promise$promise$$Promise._asap=lib$es6$promise$asap$$asap;lib$es6$promise$promise$$Promise.prototype={constructor:lib$es6$promise$promise$$Promise,then:function(onFulfillment,onRejection){var parent=this;var state=parent._state;if(state===lib$es6$promise$$internal$$FULFILLED&&!onFulfillment||state===lib$es6$promise$$internal$$REJECTED&&!onRejection){return this}var child=new this.constructor(lib$es6$promise$$internal$$noop);var result=parent._result;if(state){var callback=arguments[state-1];lib$es6$promise$asap$$asap(function(){lib$es6$promise$$internal$$invokeCallback(state,child,callback,result)})}else{lib$es6$promise$$internal$$subscribe(parent,child,onFulfillment,onRejection)}return child},"catch":function(onRejection){return this.then(null,onRejection)}};function lib$es6$promise$polyfill$$polyfill(){var local;if(typeof global!=="undefined"){local=global}else if(typeof self!=="undefined"){local=self}else{try{local=Function("return this")()}catch(e){throw new Error("polyfill failed because global object is unavailable in this environment")}}var P=local.Promise;if(P&&Object.prototype.toString.call(P.resolve())==="[object Promise]"&&!P.cast){return}local.Promise=lib$es6$promise$promise$$default}var lib$es6$promise$polyfill$$default=lib$es6$promise$polyfill$$polyfill;var lib$es6$promise$umd$$ES6Promise={Promise:lib$es6$promise$promise$$default,polyfill:lib$es6$promise$polyfill$$default};if(typeof define==="function"&&define["amd"]){define(function(){return lib$es6$promise$umd$$ES6Promise})}else if(typeof module!=="undefined"&&module["exports"]){module["exports"]=lib$es6$promise$umd$$ES6Promise}else if(typeof this!=="undefined"){this["ES6Promise"]=lib$es6$promise$umd$$ES6Promise}lib$es6$promise$polyfill$$default()}).call(this);
-  }
-
-  // http://stackoverflow.com/questions/1068834/object-comparison-in-javascript?lq=1
-  function deepCompare () {
-    var i, l, leftChain, rightChain;
-
-    function compare2Objects (x, y) {
-      var p;
-
-      // remember that NaN === NaN returns false
-      // and isNaN(undefined) returns true
-      if (isNaN(x) && isNaN(y) && typeof x === 'number' && typeof y === 'number') {
-        return true;
-      }
-
-      // Compare primitives and functions.
-      // Check if both arguments link to the same object.
-      // Especially useful on step when comparing prototypes
-      if (x === y) {
-        return true;
-      }
-
-      // Works in case when functions are created in constructor.
-      // Comparing dates is a common scenario. Another built-ins?
-      // We can even handle functions passed across iframes
-      if ((typeof x === 'function' && typeof y === 'function') ||
-        (x instanceof Date && y instanceof Date) ||
-        (x instanceof RegExp && y instanceof RegExp) ||
-        (x instanceof String && y instanceof String) ||
-        (x instanceof Number && y instanceof Number)) {
-          return x.toString() === y.toString();
-      }
-
-      // At last checking prototypes as good a we can
-      if (!(x instanceof Object && y instanceof Object)) {
-        return false;
-      }
-
-      if (x.isPrototypeOf(y) || y.isPrototypeOf(x)) {
-        return false;
-      }
-
-      if (x.constructor !== y.constructor) {
-        return false;
-      }
-
-      if (x.prototype !== y.prototype) {
-        return false;
-      }
-
-      // Check for infinitive linking loops
-      if (leftChain.indexOf(x) > -1 || rightChain.indexOf(y) > -1) {
-         return false;
-      }
-
-      // Quick checking of one object beeing a subset of another.
-      // todo: cache the structure of arguments[0] for performance
-      for (p in y) {
-        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {
-          return false;
-        }
-        else if (typeof y[p] !== typeof x[p]) {
-          return false;
-        }
-      }
-
-      for (p in x) {
-        if (y.hasOwnProperty(p) !== x.hasOwnProperty(p)) {
-          return false;
-        }
-        else if (typeof y[p] !== typeof x[p]) {
-          return false;
-        }
-
-        switch (typeof (x[p])) {
-          case 'object':
-          case 'function':
-            leftChain.push(x);
-            rightChain.push(y);
-
-            if (!compare2Objects (x[p], y[p])) {
-              return false;
-            }
-
-            leftChain.pop();
-            rightChain.pop();
-            break;
-
-          default:
-            if (x[p] !== y[p]) {
-              return false;
-            }
-            break;
-        }
-      }
-
-      return true;
-    }
-
-    if (arguments.length < 1) {
-      return true; //Die silently? Don't know how to handle such case, please help...
-      // throw "Need two or more arguments to compare";
-    }
-
-    for (i = 1, l = arguments.length; i < l; i++) {
-
-      leftChain = []; //Todo: this can be cached
-      rightChain = [];
-
-      if (!compare2Objects(arguments[0], arguments[i])) {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  function Queue (grader) {
-    this.grader = grader;
-    this.gradingSteps = [];
-    this.flushing = false;
-    this.alwaysGo = false;
-  };
-
-  Queue.prototype = {
-    add: function(callback, messages, keepGoing) {
-      if (keepGoing !== false) {
-        keepGoing = true;
-      }
-
-      if (!callback) {
-        throw new Error("Every test added to the queue must have a valid function.");
-      }
-
-      this.gradingSteps.push({
-        callback: callback,
-        isCorrect: false,
-        wrongMessage: messages.wrongMessage || null,
-        comment: messages.comment || null,
-        category: messages.category || null,
-        keepGoing: keepGoing
-      });
-    },
-
-    _flush: function () {
-      if (!this.flushing) {
-        this.flushing = true;
-      }
-      this.step();
-    },
-
-    clear: function () {
-      this.flushing = false;
-      this.gradingSteps = [];
-      this.grader.endTests();
-    },
-
-    step: function () {
-      var self = this;
-      if (this.gradingSteps.length === 0) {
-        this.clear();
-      }
-
-      function executeInPromise (fn) {
-        return new Promise(function (resolve, reject) {
-          if (fn) {
-            try {
-              var result = fn();
-            } catch (e) {
-              self.clear();
-              console.log(e);
-            }
-          }
-          resolve(result);
-        });
-      };
-
-      function takeNextStep (test, result) {
-        test.isCorrect = result;
-
-        self.registerResults(test);
-
-        if (test.isCorrect || test.keepGoing || self.alwaysGo) {
-          self.step();
-        } else {
-          self.clear();
-        }
-      };
-
-      if (this.flushing) {
-        var test = this.gradingSteps.shift();
-
-        if (this.grader.async) {
-          executeInPromise(test.callback).then(function (resolve) {
-            takeNextStep(test, resolve);
-          });
-        } else if (!this.grader.async) {
-          try {
-            var result = test.callback();
-          } catch (e) {
-            console.log(e);
-            throw new Error();
-          }
-          takeNextStep(test, result);
-        }
-
-      }
-    },
-
-    registerResults: function (test) {
-      this.grader.registerResults(test);
-    }
-  };
-
-  function Grader (type, categoryMessages) {
-    var self = this;
-    this.specificFeedback = [];
-    this.comments = [];
-    this.isCorrect = false;
-    this.correctHasChanged = false;
-    this.queue = new Queue(self);
-    this.async = false;
-    this.categoryMessages = null;
-    this.generalFeedback = [];
-    this.onresult = function () {};
-
-    for (n in arguments) {
-      switch (typeof arguments[n]) {
-        case 'string':
-          if (arguments[n] === 'async') {
-            this.async = true;
-          } else if (arguments[n] === 'sync') {
-            this.async = false;
-          } else {
-            throw new Error("Invalid type argument in Grader constructor");
-          }
-          break;
-        case 'object':
-          this.categoryMessages = arguments[n];
-          break;
-        default:
-          throw new TypeError("Invalid argument in Grader constructor");
-          break;
-      }
-    }
-  };
-
-  Grader.prototype = {
-    addTest: function (callback, messages, keepGoing) {
-      this.queue.add(callback, messages, keepGoing);
-    },
-
-    runTests: function (options) {
-      if (options) {
-        this.queue.alwaysGo = options.ignoreCheckpoints || false;
-      }
-      this.queue._flush();
-    },
-
-    endTests: function () {
-      if (this.queue.flushing) {
-        this.queue.clear();
-      } else {
-        var results = this.gatherResults();
-        this.onresult(results);
-      }
-    },
-
-    registerResults: function (test) {
-      this.generateSpecificFeedback(test);
-      this.generateGeneralFeedback(test);
-      this.setCorrect(test);
-    },
-
-    generateSpecificFeedback: function (test) {
-      if (!test.isCorrect && test.wrongMessage) {
-        this.addSpecificFeedback(test.wrongMessage);
-      } else if (test.isCorrect && test.comment) {
-        this.addComment(test.comment)
-      }
-    },
-
-    generateGeneralFeedback: function (test) {
-      if (!test.isCorrect && test.category) {
-        if (this.generalFeedback.indexOf(this.categoryMessages[test.category]) === -1) {
-          this.generalFeedback.push(this.categoryMessages[test.category]);
-        }
-      }
-    },
-
-    setCorrect: function (test) {
-      if (this.correctHasChanged) {
-        this.isCorrect = this.isCorrect && test.isCorrect;
-      } else {
-        this.correctHasChanged = true;
-        this.isCorrect = test.isCorrect;
-      }
-    },
-
-    addSpecificFeedback: function (feedback) {
-      this.specificFeedback.push(feedback);
-    },
-
-    addComment: function (feedback) {
-      this.comments.push(feedback);
-    },
-
-    gatherResults: function () {
-      var self = this;
-      return {
-        isCorrect: self.isCorrect,
-        testFeedback: self.specificFeedback.concat(self.generalFeedback),
-        testComments: self.comments
-      }
-    },
-
-    getFormattedWrongMessages: function (separator) {
-      var allMessages, message;
-
-      allMessages = this.specificFeedback.concat(this.generalFeedback);
-      message = allMessages.join(separator);
-
-      return message;
-    },
-
-    getFormattedComments: function (separator) {
-      return this.comments.join(separator);
-    },
-
-    isType: function (value, expectedType) {
-      var isCorrect = false;
-
-      if (typeof value !== expectedType) {
-
-        if (typeof value === 'function') {
-          value = value.name;
-        };
-
-        isCorrect = false;
-      } else if (typeof value === expectedType){
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isInstance: function (value, expectedInstance) {
-      var isCorrect = false;
-
-      if (value instanceof expectedInstance !== true) {
-
-        isCorrect = false;
-      } else if (value instanceof expectedInstance === true){
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isValue: function (value1, value2) {
-      var isCorrect = false;
-
-      if (!deepCompare(value1, value2)) {
-        isCorrect = false;
-      } else if (deepCompare(value1, value2)) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isInRange: function (value, lower, upper) {
-      var isCorrect = false;
-
-      if (typeof value !== 'number' || isNaN(value)) {
-        isCorrect = false
-      } else if (value > upper || value < lower) {
-        isCorrect = false;
-
-      } else if (value < upper || value > lower) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isSet: function (value) {
-      var isCorrect = false;
-
-      if (value === undefined) {
-        isCorrect = false;
-
-      } else {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    isjQuery: function (elem) {
-      // could use obj.jquery, which will only return true if it is a jquery object
-      var isjQ = false;
-      if (elem instanceof $) {
-        isjQ = true;
-      }
-      return isjQ;
-    },
-
-    hasCorrectTag: function (elem, tag) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasTag = false;
-      if (elem.is(tag)) {
-        hasTag = true;
-      }
-      return hasTag;
-    },
-
-    hasCorrectClass: function (elem, className) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasClass = false;
-      if (elem.hasClass(className)) {
-        hasClass = true;
-      }
-      return hasClass;
-    },
-
-    hasCorrectId: function (elem, id) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.is('#' + id)) return true;
-      return false;
-    },
-
-    hasCorrectText: function (elem, text) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasText = false;
-      var re = new RegExp(text);
-      if (elem.text().match(re)) {
-        hasText = true;
-      }
-      return hasText;
-    },
-
-    hasAttr: function (elem, attrName, correctAttr) {
-      var isCorrect = false;
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (correctAttr && elem.attr(attrName) === correctAttr) {
-        isCorrect = true;
-      } else if (!correctAttr && elem.attr(attrName)) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    hasCorrectLength: function (elems, _length) {
-      if (!this.isjQuery(elems)) {
-        elems = $(elems);
-      }
-      var correctLength = false;
-      var cLength = elems.length;
-      if (cLength === _length) {
-        correctLength = true;
-      }
-      return correctLength;
-    },
-
-    isCorrectElem: function (elem, correctElem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.is(correctElem)) {
-        is = true;
-      }
-      return is;
-    },
-
-    isCorrectCollection: function (collection, correctCollection) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (collection.is(correctCollection)) {
-        is = true;
-      }
-      return is;
-    },
-
-    hasCorrectStyle: function (elem, cssProperty, _correctStyle) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasCorrectStyle = false;
-      var currentStyle = elem.css(cssProperty);
-      if (currentStyle  === _correctStyle) {
-        hasCorrectStyle = true;
-      }
-      return hasCorrectStyle;
-    },
-
-    hasCorrectStyle: function (elem, cssProperty, _correctStyle) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var hasCorrectStyle = false;
-      /* if one style is passed, convert to array */
-      if (typeof _correctStyle === 'string') {
-        _correctStyle = [_correctStyle];
-      }
-      var currentStyle = elem.css(cssProperty);
-      for (var i = 0; i < _correctStyle.length; i++) {
-          if (currentStyle === _correctStyle[i]) {
-            hasCorrectStyle = true;
-          }
-       }
-      return hasCorrectStyle;
-    },
-
-    propertyIsLessThan : function (elem, cssProperty, value) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.css(cssProperty) < value) {
-        is = true;
-      }
-      return is;
-    },
-
-    propertyIsGreaterThan : function (elem, cssProperty, value) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var is = false;
-      if (elem.css(cssProperty) > value) {
-        is = true;
-      }
-      return is;
-    },
-
-    doesExistInParent: function (elem, parentElem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (!this.isjQuery(parentElem)) {
-        parentElem = $(parentElem);
-      }
-      var inParent = false;
-      if (parentElem.find(elem).length > 0) {
-        inParent = true;
-      }
-      return inParent;
-    },
-
-    elemDoesExist: function (elem) {
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      var exists = false;
-      if (elem.length > 0) {
-        exists = true;
-      }
-      return exists;
-    },
-
-    areSiblings: function (elem1, elem2) {
-      if (!this.isjQuery(elem1)) {
-        elem1 = $(elem1);
-      }
-      if (!this.isjQuery(elem2)) {
-        elem2 = $(elem2);
-      }
-      var siblingLove = false;
-      if (elem1.siblings(elem2).length > 0) {
-        siblingLove = true;
-      }
-      return siblingLove;
-    },
-
-    isImmediateChild: function (elem, parentElem) {
-      var isCorrect = false;
-      if (this.isjQuery(elem)) {
-        throw new Error("elem needs to be a string for Grader.isImmediateChild()");
-      }
-      if (!this.isjQuery(parentElem)) {
-        parentElem = $(parentElem);
-      }
-      if (parentElem.children(elem).length > 0) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    hasParent: function (elem, parentElem) {
-      var isCorrect = false;
-      if (this.isjQuery(parentElem)) {
-        throw new Error("parentElem needs to be a string for Grader.hasParent()");
-      }
-      if (!this.isjQuery(elem)) {
-        elem = $(elem);
-      }
-      if (elem.closest(parentElem).length > 0) {
-        isCorrect = true;
-      }
-      return isCorrect;
-    },
-
-    sendResultsToExecutor: function () {
-      var output = {
-        isCorrect: false,
-        test_feedback: "",
-        test_comments: "",
-        congrats: ""
-      }
-      for (arg in arguments) {
-        var thisIsCorrect = arguments[arg].isCorrect;
-        var thisTestFeedback = arguments[arg].getFormattedWrongMessages();
-        var thisTestComment = arguments[arg].getFormattedComments();
-        if (typeof thisIsCorrect !== 'boolean') {
-          thisIsCorrect = false;
-        }
-
-        switch (arg) {
-          case '0':
-            output.congrats = arguments[arg];
-          case '1':
-            output.isCorrect = thisIsCorrect;
-            output.test_feedback = thisTestFeedback;
-            output.test_comments = thisTestComment;
-            break;
-          default:
-            output.isCorrect = thisIsCorrect && output.isCorrect;
-            if (output.test_feedback !== "") {
-              output.test_feedback = [output.test_feedback, thisTestFeedback].join('\n');
-            } else {
-              output.test_feedback = thisTestFeedback;
-            }
-
-            if (output.test_comments !== "") {
-              output.test_comments = [output.test_comments, thisTestFeedback].join('\n');
-            } else {
-              output.test_comments = thisTestComment;
-            }
-            break;
-        }
-      }
-      output = JSON.stringify(output);
-      console.info("UDACITY_RESULT:" + output);
-    }
-  }
-  return Grader;
-})();
-
-function performTesting() {
-  return {'result': 'noop'}
-}
-
-function performSubmission() {
-	var grader = new Grader({
-		// can add shared messages here
-	});
-
-  // check if title has been added to all headers
-  grader.addTest(function() {
-    return grader.hasCorrectClass($('h1'), 'title') && grader.hasCorrectClass($('div h2:nth-of-type(1)'), 'title') && grader.hasCorrectClass($('div h2:nth-of-type(2)'), 'title') && grader.hasCorrectClass($('div h2:nth-of-type(3)'), 'title');
-  }, {
-    wrongMessage: "The class \"title\" should be applied to all headers. Have you added \"title\" to every header?"
-  });
-
-  // check if to-do-list has been added to the main div
-  grader.addTest(function() {
-    return grader.hasCorrectId($('div'), 'to-do-list');
-  }, {
-    wrongMessage: "The id \"to-do-list\" needs to be added to the HTML. What element would make the most sense to have the id \"to-do-list\"?"
-  });
-
-  // check if headers for each to-do-list are underlined
-  grader.addTest(function() {
-    return grader.hasCorrectClass($('div h2:nth-of-type(1)'), 'underline') && grader.hasCorrectClass($('div h2:nth-of-type(2)'), 'underline') && grader.hasCorrectClass($('div h2:nth-of-type(3)'), 'underline');
-  }, {
-    wrongMessage: "The headers for each to-do-list need to be underlined. Remember, you can add multiple classes to elements."
-  });
-
-  // check if brainstorm task has been crossed out
-  grader.addTest(function() {
-    return grader.hasCorrectClass($('ul:eq(1) li:nth-child(1)'), 'finished');
-  }, {
-    wrongMessage: "The task \"brainstorm ideas for Science project\" should be marked out. Try using the class \"finished\" on the list element."
-  });
-
-  // check if cal 2 task has been crossed out
-  grader.addTest(function() {
-    return grader.hasCorrectClass($('ul:eq(1) li:nth-child(2)'), 'finished');
-  }, {
-    wrongMessage: "The task \"finish Calculus 2 problems\" should be crossed out. The \"finished\" class could come in handy here."
-  });
-
-  // check if invitations task has been crossed out
-  grader.addTest(function() {
-    return grader.hasCorrectClass($('ul:eq(2) li:nth-child(1)'), 'finished');
-  }, {
-    wrongMessage: "The task \"send out invitations\" is not crossed out? Make sure you add the correct class to the list element in order to mark out the task."
-  });
-
-  // check if unordered lists have the class list
-  grader.addTest(function() {
-    return grader.hasCorrectClass($('ul:eq(0)'), 'list') && grader.hasCorrectClass($('ul:eq(1)'), 'list') && grader.hasCorrectClass($('ul:eq(2)'), 'list');
-  }, {
-    wrongMessage: "Did you remove a class? Each list should have the class \"list\"."
-  });
-
-  // check if sweep garage task has been crossed out
-  grader.addTest(function() {
-    return grader.hasCorrectClass($('ul:eq(0) li:nth-child(4)'), 'finished');
-  }, {
-    wrongMessage: "Did you remove a class? The task \"sweep the garage\" is not crossed out?"
-  });
-
-  // check if biology task has been crossed out
-  grader.addTest(function() {
-    return grader.hasCorrectClass($('ul:eq(1) li:nth-child(5)'), 'finished');
-  }, {
-    wrongMessage: "Did you remove a class? The task \"find sources for Biology research paper\" is not crossed out?"
-  });
-
-	grader.runTests();
-
-	result = {
-	  is_correct: grader.isCorrect,
-	  test_feedback: grader.getFormattedWrongMessages('\n'),
-	  test_comments: grader.getFormattedComments('\n'),
-	  congrats: "Nice job! Using attributes, like id and class, make styling webpages super quick!"
-	};
-	return result;
-};
\ No newline at end of file
diff --git a/lessons/L3/problem-set/06-using-attributes/to-do-list-1.jpg b/lessons/L3/problem-set/06-using-attributes/to-do-list-1.jpg
deleted file mode 100644
index 78716900b..000000000
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diff --git a/lessons/L3/problem-set/06-using-attributes/to-do-list-2.jpg b/lessons/L3/problem-set/06-using-attributes/to-do-list-2.jpg
deleted file mode 100644
index 9cb93ff97..000000000
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diff --git a/lessons/L3/problem-set/06-using-attributes/to-do-list-solution.jpg b/lessons/L3/problem-set/06-using-attributes/to-do-list-solution.jpg
deleted file mode 100644
index 12b2b61aa..000000000
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diff --git a/lessons/L3/problem-set/06-using-attributes/to-do-list.jpg b/lessons/L3/problem-set/06-using-attributes/to-do-list.jpg
deleted file mode 100644
index 1cfae96e2..000000000
Binary files a/lessons/L3/problem-set/06-using-attributes/to-do-list.jpg and /dev/null differ
diff --git a/lessons/L3/problem-set/07-slack-card/card.png b/lessons/L3/problem-set/07-slack-card/card.png
deleted file mode 100644
index 5dfaa0285..000000000
Binary files a/lessons/L3/problem-set/07-slack-card/card.png and /dev/null differ
diff --git a/lessons/L3/problem-set/07-slack-card/image-form.jpeg b/lessons/L3/problem-set/07-slack-card/image-form.jpeg
deleted file mode 100644
index a7940aec4..000000000
Binary files a/lessons/L3/problem-set/07-slack-card/image-form.jpeg and /dev/null differ
diff --git a/lessons/L3/problem-set/07-slack-card/index.html b/lessons/L3/problem-set/07-slack-card/index.html
deleted file mode 100644
index 427360d13..000000000
--- a/lessons/L3/problem-set/07-slack-card/index.html
+++ /dev/null
@@ -1,102 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Slacker Card</title>
-  <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,300' rel='stylesheet' type='text/css'>
-  <meta name="udacity-grader" content="tests.json">
-  <style>
-    * {
-      box-sizing: border-box;
-    }
-    body {
-      font-family: 'Open Sans', sans-serif;
-      color: #222;
-    }
-    .card {
-      height: 475px;
-      width: 325px;
-      box-shadow: 0px 5px 15px 0px rgba(153,153,153,0.5);
-      border-radius: 4px;
-    }
-    .top {
-      height: 55%;
-      border-radius: 4px 4px 0px 0px;
-      border: 1px solid #ddd;
-      padding: 0px 16px;
-    }
-    .name {
-      padding-top: calc(475px * 0.40);
-      margin: 0px;
-    }
-    .status {
-      display: inline-block;
-      width: 10px;
-      height: 10px;
-      margin-left: 4px;
-
-      border-radius: 5px;
-      background-color: #60D156;
-    }
-    .title {
-      margin-top: 8px;
-    }
-    .middle {
-      height: 5%;
-      border-left: 1px solid #ddd;
-      border-right: 1px solid #ddd;
-      padding: 0px 16px;
-    }
-    .time {
-      color: #444;
-      font-size: 0.8em;
-      padding-top: 0.2em;
-    }
-    .bottom {
-      height: 40%;
-      border-radius: 0px 0px 4px 4px;
-      border: 1px solid #ddd;
-      padding: 8px 16px;
-    }
-    .profile-action {
-      display: block;
-      width: 100%;
-      height: 32px;
-      font-size: 1em;
-      text-align: left;
-
-      border: 0px;
-      background-color: white;
-    }
-    .profile-action:hover {
-      background-color: #00A5D2;
-      color: white;
-    }
-  </style>
-</head>
-<body>
-  <section>
-    <div class="card">
-      <div class="top">
-        <h3 class="name">Udacity Stufent <span class="status"></span></h3>
-        <p class="title">Learner Extraordinaire</p>
-      </div>
-      <div class="middle">
-        <div class="time">12:34 PM local time</div>
-      </div>
-      <div class="bottom">
-        <button class="profile-action">View preferences</button>
-        <button class="profile-action">Open account settings</button>
-        <button class="profile-action">Edit your profile</button>
-        <button class="profile-action">View your files</button>
-        <button class="profile-action">Set yourself away</button>
-      </div>
-    </div>
-  </section>
-  <section>
-    <p>
-      <em>Note: the buttons have class <code>profile-action</code></em>
-    </p>
-  </section>
-</body>
-</html>
diff --git a/lessons/L3/problem-set/07-slack-card/instructions.md b/lessons/L3/problem-set/07-slack-card/instructions.md
deleted file mode 100644
index 998f57dcc..000000000
--- a/lessons/L3/problem-set/07-slack-card/instructions.md
+++ /dev/null
@@ -1,8 +0,0 @@
-### How to Complete this Quiz
-
-1. Open [this website](http://udacity.github.io/fend/lessons/L3/problem-set/07-slack-card/index.html) with Chrome.
-2. Turn on the [Udacity Feedback Chrome Extension](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345403/modules/742847927175460/lessons/7323812069/concepts/73256617910923).
-3. Use Developer Tools to pass all the tests.
-4. Copy and paste the code that appears into the next page to finish!
-
-Good luck!
\ No newline at end of file
diff --git a/lessons/L3/problem-set/07-slack-card/profile-placeholder.svg b/lessons/L3/problem-set/07-slack-card/profile-placeholder.svg
deleted file mode 100644
index 109e43f00..000000000
--- a/lessons/L3/problem-set/07-slack-card/profile-placeholder.svg
+++ /dev/null
@@ -1,96 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   version="1.1"
-   viewBox="0 0 353 354"
-   stroke-miterlimit="10"
-   id="svg2"
-   inkscape:version="0.91 r13725"
-   sodipodi:docname="test.svg"
-   width="353"
-   height="354"
-   style="fill:none;stroke:none;stroke-linecap:square;stroke-miterlimit:10">
-  <metadata
-     id="metadata23">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title></dc:title>
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <defs
-     id="defs21" />
-  <sodipodi:namedview
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1"
-     objecttolerance="10"
-     gridtolerance="10"
-     guidetolerance="10"
-     inkscape:pageopacity="0"
-     inkscape:pageshadow="2"
-     inkscape:window-width="900"
-     inkscape:window-height="749"
-     id="namedview19"
-     showgrid="false"
-     fit-margin-top="-158"
-     fit-margin-left="-307"
-     fit-margin-right="-300"
-     fit-margin-bottom="-208"
-     borderlayer="true"
-     inkscape:zoom="0.75972222"
-     inkscape:cx="173"
-     inkscape:cy="152.0001"
-     inkscape:window-x="0"
-     inkscape:window-y="0"
-     inkscape:window-maximized="0"
-     inkscape:current-layer="g7" />
-  <clipPath
-     id="p.0">
-    <path
-       d="M 0,0 960,0 960,720 0,720 0,0 Z"
-       id="path5"
-       inkscape:connector-curvature="0"
-       style="clip-rule:nonzero" />
-  </clipPath>
-  <g
-     clip-path="url(#p.0)"
-     id="g7"
-     transform="translate(-307,-158)">
-    <path
-       d="m 0,0 960,0 0,720 -960,0 z"
-       id="path9"
-       inkscape:connector-curvature="0"
-       style="fill:#000000;fill-opacity:0;fill-rule:nonzero" />
-    <path
-       d="m 301.89502,156.63255 366.2992,0 0,356.22046 -366.2992,0 z"
-       id="path11"
-       inkscape:connector-curvature="0"
-       style="fill:#cfe2f3;fill-rule:nonzero" />
-    <path
-       d="m 301.89502,156.63255 366.2992,0 0,356.22046 -366.2992,0 z"
-       id="path13"
-       inkscape:connector-curvature="0"
-       style="fill-rule:nonzero;stroke:#000000;stroke-width:1;stroke-linecap:butt;stroke-linejoin:round" />
-    <path
-       d="m 398.99738,276.00262 0,0 c 0,-49.18378 38.52466,-89.05512 86.04724,-89.05512 l 0,0 c 22.82114,0 44.70758,9.38257 60.8446,26.08364 16.13697,16.70108 25.20264,39.3526 25.20264,62.97148 l 0,0 c 0,49.18377 -38.52466,89.05511 -86.04724,89.05511 l 0,0 c -47.52258,0 -86.04724,-39.87134 -86.04724,-89.05511 z"
-       id="path15"
-       inkscape:connector-curvature="0"
-       style="fill:#ffffff;fill-rule:nonzero" />
-    <path
-       d="m 329.0551,521.6903 0,0 c 0,-94.87994 67.58032,-171.79529 150.94489,-171.79529 l 0,0 c 40.03308,0 78.42651,18.09979 106.73413,50.31766 28.30768,32.21786 44.21075,75.91467 44.21075,121.47763 l 0,0 c 0,94.87988 -67.58032,171.79523 -150.94489,171.79523 l 0,0 c -83.36456,0 -150.94489,-76.91535 -150.94489,-171.79523 z"
-       id="path17"
-       inkscape:connector-curvature="0"
-       style="fill:#ffffff;fill-rule:nonzero" />
-  </g>
-</svg>
diff --git a/lessons/L3/problem-set/07-slack-card/question.md b/lessons/L3/problem-set/07-slack-card/question.md
deleted file mode 100644
index 8f49fe0ee..000000000
--- a/lessons/L3/problem-set/07-slack-card/question.md
+++ /dev/null
@@ -1,13 +0,0 @@
-[Slack](http://slack.com/) is a popular chat platform (if you're enrolled in the Front End Nanodegree, then you have access to the FEND Slack team!).
-
-A Slack channel usually shows a list of names and their messages. If you click on someone's name, you'll see a card pop up that looks something like this:
-
-![slack profile card](http://udacity.github.io/fend/lessons/L3/problem-set/07-slack-card/card.png)
-
-Cameron's profile card looks great, but [this one](http://udacity.github.io/fend/lessons/L3/problem-set/07-slack-card/index.html) does not.
-
-For this quiz, you'll be using Developer Tools to make [this website](http://udacity.github.io/fend/lessons/L3/problem-set/07-slack-card/index.html) look more like a Slack profile card.
-
-*Note: the buttons at the bottom of the page have the class* <code>profile-action</code>*.*
-
-You'll need to do [some](https://css-tricks.com/almanac/) [research](https://developer.mozilla.org/en-US/docs/Web/CSS/Reference) for this quiz. There are at **least two new CSS properties** that you'll need to look up.
\ No newline at end of file
diff --git a/lessons/L3/problem-set/07-slack-card/solution.html b/lessons/L3/problem-set/07-slack-card/solution.html
deleted file mode 100644
index 07e276f12..000000000
--- a/lessons/L3/problem-set/07-slack-card/solution.html
+++ /dev/null
@@ -1,106 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <title>Slacker Card</title>
-  <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,300' rel='stylesheet' type='text/css'>
-  <meta name="udacity-grader" content="tests.json">
-  <style>
-    * {
-      box-sizing: border-box;
-    }
-    body {
-      font-family: 'Open Sans', sans-serif;
-      color: #222;
-    }
-    .card {
-      height: 475px;
-      width: 325px;
-      box-shadow: 0px 5px 15px 0px rgba(153,153,153,0.5);
-      border-radius: 4px;
-    }
-    .top {
-      height: 55%;
-      border-radius: 4px 4px 0px 0px;
-      border: 1px solid #ddd;
-      background-image: url(profile-placeholder.svg);
-      padding: 0px 16px;
-    }
-    .name {
-      padding-top: calc(475px * 0.40);
-      margin: 0px;
-    }
-    .status {
-      display: inline-block;
-      width: 10px;
-      height: 10px;
-      margin-left: 4px;
-
-      border-radius: 5px;
-      background-color: #60D156;
-    }
-    .title {
-      margin-top: 8px;
-    }
-    .middle {
-      height: 5%;
-      border-left: 1px solid #ddd;
-      border-right: 1px solid #ddd;
-      padding: 0px 16px;
-    }
-    .time {
-      color: #444;
-      font-size: 0.8em;
-      padding-top: 0.2em;
-    }
-    .bottom {
-      height: 40%;
-      border-radius: 0px 0px 4px 4px;
-      border: 1px solid #ddd;
-      padding: 8px 16px;
-    }
-    .profile-action {
-      display: block;
-      width: 100%;
-      height: 32px;
-      font-family: 'Open Sans', sans-serif;
-      font-size: 1em;
-      text-align: left;
-
-      border-radius: 4px;
-      border: 0px;
-      background-color: white;
-      cursor: pointer;
-    }
-    .profile-action:hover {
-      background-color: #00A5D2;
-      color: white;
-    }
-  </style>
-</head>
-<body>
-  <section>
-    <div class="card">
-      <div class="top">
-        <h3 class="name">Udacity Student <span class="status"></span></h3>
-        <p class="title">Learner Extraordinaire</p>
-      </div>
-      <div class="middle">
-        <div class="time">12:34 PM local time</div>
-      </div>
-      <div class="bottom">
-        <button class="profile-action">View preferences</button>
-        <button class="profile-action">Open account settings</button>
-        <button class="profile-action">Edit your profile</button>
-        <button class="profile-action">View your files</button>
-        <button class="profile-action">Set yourself away</button>
-      </div>
-    </div>
-  </section>
-  <section>
-    <p>
-      <em>Note: the buttons have class <code>profile-action</code></em>
-    </p>
-  </section>
-</body>
-</html>
diff --git a/lessons/L3/problem-set/07-slack-card/tests.json b/lessons/L3/problem-set/07-slack-card/tests.json
deleted file mode 100644
index a22cdaec4..000000000
--- a/lessons/L3/problem-set/07-slack-card/tests.json
+++ /dev/null
@@ -1,46 +0,0 @@
-[{
-  "name": "Slacker Card",
-  "code": "imnotslacking",
-  "tests": [
-    {
-      "description": "The buttons have 4px rounded borders",
-      "definition": {
-        "nodes": ".profile-action",
-        "cssProperty": "borderRadius",
-        "equals": "4px"
-      }
-    },
-    {
-      "description": "The buttons have a hand mouse cursor",
-      "definition": {
-        "nodes": ".profile-action",
-        "cssProperty": "cursor",
-        "equals": "pointer"
-      }
-    },
-    {
-      "description": "The font of the buttons match the rest of the page",
-      "definition": {
-        "nodes": ".profile-action",
-        "cssProperty": "fontFamily",
-        "hasSubstring": "Open Sans"
-      }
-    },
-    {
-      "description": "The <strong>top</strong> has a profile-placeholder.svg background image",
-      "definition": {
-        "nodes": ".top",
-        "cssProperty": "backgroundImage",
-        "hasSubstring": "profile-placeholder.svg"
-      }
-    },
-    {
-      "description": "The typo (mistake) in the card name is fixed",
-      "definition": {
-        "nodes": ".name",
-        "get": "innerHTML",
-        "hasSubstring": "Udacity Student"
-      }
-    }
-  ]
-}]
diff --git a/lessons/L3/problem-set/08-udacity-site-header/Udacity_Logo_SVG_200x35.svg b/lessons/L3/problem-set/08-udacity-site-header/Udacity_Logo_SVG_200x35.svg
deleted file mode 100644
index 1ed8fc3f1..000000000
--- a/lessons/L3/problem-set/08-udacity-site-header/Udacity_Logo_SVG_200x35.svg
+++ /dev/null
@@ -1,37 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Generator: Adobe Illustrator 19.2.1, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
-<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
-	 viewBox="0 0 200 35" style="enable-background:new 0 0 200 35;" xml:space="preserve">
-<style type="text/css">
-	.st0{fill:#01B3E3;}
-	.st1{fill:#2D3C49;}
-</style>
-<g>
-	<path id="mark_3_" class="st0" d="M11.818,0L0,6.699l0.001,15.43l0,0C-0.021,29.216,5.775,34.978,12.946,35
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-		l-9.599,5.36l0.001,0.001l0,0L23.464,22.2c-0.002,0.714-0.034,1.236-0.222,2.118c-0.32,1.345-0.77,2.291-0.849,2.451
-		c-0.732-0.05-2.278-0.469-3.512-1.196c-0.616-0.354-1.349-0.879-2.01-1.497c-0.427-0.424-0.814-0.891-1.15-1.386
-		c-0.339-0.5-0.631-1.034-0.865-1.587c-0.239-0.563-0.422-1.152-0.544-1.75c-0.125-0.615-0.153-1.249-0.152-1.884h0l0.008-16.114
-		L11.818,0z M17.257,31.841c-0.641,0.266-1.311,0.469-1.993,0.605c-0.7,0.139-1.346,0.209-2.068,0.207
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-		c-0.141-0.692-0.167-1.405-0.165-2.119L2.647,8.039l8.862-5.345l-0.011,14.768h0c-0.017,5.612,4.164,10.296,9.503,11.428
-		c-0.209,0.247-0.36,0.484-0.591,0.711c-0.483,0.474-1.004,0.918-1.568,1.292C18.273,31.27,17.886,31.58,17.257,31.841z
-		 M32.607,19.436c-0.126,0.598-0.312,1.185-0.555,1.747c-0.644,1.412-1.692,2.612-2.568,3.385c-1.788,1.625-4.016,2.127-4.273,2.128
-		c0.536-1.4,0.897-2.9,0.903-4.485l0,0L26.113,6.777h0l6.647-4.02l0.003,14.768C32.761,18.16,32.736,18.821,32.607,19.436z"/>
-	<g id="wordmark_2_">
-		<g>
-			<path class="st1" d="M65.507,19.301c0,2.913-2.459,5.322-5.784,5.322c-3.325,0-5.722-2.409-5.722-5.322V8.876h-1.768v10.45
-				c0,3.755,2.928,7.05,7.49,7.05c4.562,0,7.56-3.295,7.56-7.05V8.876h-1.775V19.301z M84.36,8.876h-5.566l0.002,17.063l5.755-0.001
-				c5.143,0,8.413-3.153,8.413-8.545C92.963,12.05,89.502,8.876,84.36,8.876z M84.189,24.204l-3.624-0.015V10.626l3.624-0.005
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-				c-4.899,0-8.661,3.738-8.661,8.648c0,4.935,3.665,9.084,8.735,9.084c4.216,0,6.555-2.849,6.555-2.849l-0.975-1.18
-				C139.204,22.327,137.109,24.617,133.648,24.617z M151.399,25.939h1.771V8.876h-1.771V25.939z M163.352,10.626h6.198
-				l-0.001,15.312h1.772V10.626h6.198v-1.75h-14.167V10.626z M198.099,8.876l-5.493,7.861h-0.049l-5.547-7.861h-1.925l6.601,9.696
-				l0,7.367h1.771v-7.367L200,8.876H198.099z M107.947,8.876l-6.983,17.049h1.847l1.848-4.563l7.772-1.574l2.498,6.138h1.847
-				l-6.983-17.049H107.947z M105.436,19.48l3.41-8.265h0.048l2.88,6.981L105.436,19.48z"/>
-		</g>
-	</g>
-</g>
-</svg>
diff --git a/lessons/L3/problem-set/08-udacity-site-header/blog.png b/lessons/L3/problem-set/08-udacity-site-header/blog.png
deleted file mode 100644
index bdbc0bbeb..000000000
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diff --git a/lessons/L3/problem-set/08-udacity-site-header/header.png b/lessons/L3/problem-set/08-udacity-site-header/header.png
deleted file mode 100644
index ef350159f..000000000
Binary files a/lessons/L3/problem-set/08-udacity-site-header/header.png and /dev/null differ
diff --git a/lessons/L3/problem-set/08-udacity-site-header/image-form.jpeg b/lessons/L3/problem-set/08-udacity-site-header/image-form.jpeg
deleted file mode 100644
index 4f1a5fa62..000000000
Binary files a/lessons/L3/problem-set/08-udacity-site-header/image-form.jpeg and /dev/null differ
diff --git a/lessons/L3/problem-set/08-udacity-site-header/index.html b/lessons/L3/problem-set/08-udacity-site-header/index.html
deleted file mode 100644
index 20fd815ec..000000000
--- a/lessons/L3/problem-set/08-udacity-site-header/index.html
+++ /dev/null
@@ -1,87 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="utf-8">
-  <title>Udacity Site Header</title>
-  <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,300' rel='stylesheet' type='text/css'>
-  <meta name="udacity-grader" content="tests.json">
-  <style>
-    * {
-      box-sizing: border-box;
-    }
-    body {
-      font-family: 'Open Sans', sans-serif;
-
-      margin: 0;
-      padding: 0;
-    }
-    header {
-      font-weight: 800;
-      -webkit-font-smoothing: antialiased;
-
-      background: white;
-      height: 85px;
-      padding: 15px;
-    }
-    section {
-      padding: 16px;
-    }
-    .flex-container {
-      display: flex;
-    }
-    .space-between {
-      justify-content: space-between;
-    }
-    .vertical-centerer {
-      height: 100%;
-      flex-direction: column;
-      justify-content: center;
-    }
-    .header-content {
-      width: 960px;
-      margin-left: auto;
-      margin-right: auto;
-    }
-    .logo {
-      width: 500px;
-      display: inline-block;
-      margin: 10px 0px;
-    }
-    .menu {
-      list-style: none;
-      list-style-type: none;
-    }
-    .menu > li {
-      display: inline;
-      margin-left: 37.5px;
-    }
-  </style>
-</head>
-<body>
-  <header>
-    <div class="vertical-centerer flex-container">
-      <div class="flex-container space-between header-content">
-        <div>
-          <span>
-            <img class="logo" src="Udacity_Logo_SVG_200x35.svg" alt="Udacity Logo">
-          </span>
-        </div>
-        <div>
-          <ul class="menu">
-            <li>Nanodegree</li>
-            <li>Catalog</li>
-            <li>Classroom</li>
-          </ul>
-        </div>
-      </div>
-    </div>
-  </header>
-  <section>
-    <p>Ewww. The header looks weird.</p>
-
-    <p>
-      You need to use Developer Tools to edit this website and pass this quiz. Make sure you read the criteria carefully because they contain the exact CSS properties that you need to change!
-    </p>
-  </section>
-</body>
-</html>
diff --git a/lessons/L3/problem-set/08-udacity-site-header/instructions.md b/lessons/L3/problem-set/08-udacity-site-header/instructions.md
deleted file mode 100644
index 63a57fa33..000000000
--- a/lessons/L3/problem-set/08-udacity-site-header/instructions.md
+++ /dev/null
@@ -1,8 +0,0 @@
-### How to Complete this Quiz
-
-1. Open [this website](http://udacity.github.io/fend/lessons/L3/problem-set/08-udacity-site-header/index.html) with Chrome.
-2. Turn on the [Udacity Feedback Chrome Extension](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345403/modules/742847927175460/lessons/7323812069/concepts/73256617910923)
-3. Use Developer Tools to pass all the tests.
-4. Copy and paste the code that appears into the next page to finish!
-
-Good luck!
\ No newline at end of file
diff --git a/lessons/L3/problem-set/08-udacity-site-header/question.md b/lessons/L3/problem-set/08-udacity-site-header/question.md
deleted file mode 100644
index 505fd0f6f..000000000
--- a/lessons/L3/problem-set/08-udacity-site-header/question.md
+++ /dev/null
@@ -1,15 +0,0 @@
-I want to give you some practice with [Chrome Developer Tools](https://developers.google.com/web/tools/chrome-devtools/?hl=en)! You'll need to use DevTools to complete this quiz.
-
-Start by taking a look at any page on Udacity (like this one!).
-
-![Udacity blog as of April 2016](http://udacity.github.io/fend/lessons/L3/problem-set/08-udacity-site-header/blog.png)
-
-*The Udacity blog as of April 2016*
-
-Notice the header bar at the top of the page.
-
-![Udacity header bar](http://udacity.github.io/fend/lessons/L3/problem-set/08-udacity-site-header/header.png)
-
-*The Udacity header as of April 2016*
-
-I want you to use DevTools to make [this website](http://udacity.github.io/fend/lessons/L3/problem-set/08-udacity-site-header/index.html) look like the Udacity header.
\ No newline at end of file
diff --git a/lessons/L3/problem-set/08-udacity-site-header/solution.html b/lessons/L3/problem-set/08-udacity-site-header/solution.html
deleted file mode 100644
index 7f0333090..000000000
--- a/lessons/L3/problem-set/08-udacity-site-header/solution.html
+++ /dev/null
@@ -1,89 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-  <meta charset="utf-8">
-  <title>Udacity Site Header</title>
-  <link href='https://fonts.googleapis.com/css?family=Open+Sans:400,300' rel='stylesheet' type='text/css'>
-  <meta name="udacity-grader" content="tests.json">
-  <style>
-    * {
-      box-sizing: border-box;
-    }
-    body {
-      font-family: 'Open Sans', sans-serif;
-
-      margin: 0;
-      padding: 0;
-      background: #ddd;
-    }
-    header {
-      font-weight: 400;
-      -webkit-font-smoothing: antialiased;
-      color: #697681;
-
-      background: white;
-      height: 85px;
-      padding: 15px;
-    }
-    section {
-      padding: 16px;
-    }
-    .flex-container {
-      display: flex;
-    }
-    .space-between {
-      justify-content: space-between;
-    }
-    .vertical-centerer {
-      height: 100%;
-      flex-direction: column;
-      justify-content: center;
-    }
-    .header-content {
-      width: 960px;
-      margin-left: auto;
-      margin-right: auto;
-    }
-    .logo {
-      width: 200px;
-      display: inline-block;
-      margin: 10px 0px;
-    }
-    .menu {
-      list-style: none;
-      list-style-type: none;
-    }
-    .menu > li {
-      display: inline;
-      margin-left: 37.5px;
-    }
-  </style>
-</head>
-<body>
-  <header>
-    <div class="vertical-centerer flex-container">
-      <div class="flex-container space-between header-content">
-        <div>
-          <span>
-            <img class="logo" src="Udacity_Logo_SVG_200x35.svg" alt="Udacity Logo">
-          </span>
-        </div>
-        <div>
-          <ul class="menu">
-            <li>Nanodegree</li>
-            <li>Catalog</li>
-            <li>Classroom</li>
-          </ul>
-        </div>
-      </div>
-    </div>
-  </header>
-    <section>
-    <p>Ewww. The header looks weird.</p>
-
-    <p>
-      You need to use Developer Tools to edit this website and pass this quiz. Make sure you read the criteria carefully because they contain the exact CSS properties that you need to change!
-    </p>
-  </section>
-</body>
-</html>
diff --git a/lessons/L3/problem-set/08-udacity-site-header/tests.json b/lessons/L3/problem-set/08-udacity-site-header/tests.json
deleted file mode 100644
index ebcbe4bc6..000000000
--- a/lessons/L3/problem-set/08-udacity-site-header/tests.json
+++ /dev/null
@@ -1,41 +0,0 @@
-[{
-  "name": "Blog Header",
-  "code": "fullsteamahead",
-  "tests": [
-    {
-      "description": "The header has the right text <code>color</code> (<code>#697681</code>)",
-      "definition": {
-        "nodes": "header",
-        "cssProperty": "color",
-        "equals": "rgb(105, 118, 129)"
-      }
-    },
-    {
-      "description": "The <code>font-weight</code> of the header text is <code>400</code>",
-      "definition": {
-        "nodes": "header",
-        "cssProperty": "fontWeight",
-        "equals": [
-          "400",
-          "normal"
-        ]
-      }
-    },
-    {
-      "description": "The <code>width</code> of the Udacity logo is <code>200px</code>",
-      "definition": {
-        "nodes": ".logo",
-        "cssProperty": "width",
-        "equals": "200px"
-      }
-    },
-    {
-      "description": "The <code>background-color</code> of the body is <code>#ddd</code>",
-      "definition": {
-        "nodes": "body",
-        "cssProperty": "backgroundColor",
-        "equals": "rgb(221, 221, 221)"
-      }
-    }
-  ]
-}]
diff --git a/lessons/L3/problem-set/09-what-is-a-stylesheet/better-way-meme.jpg b/lessons/L3/problem-set/09-what-is-a-stylesheet/better-way-meme.jpg
deleted file mode 100644
index 6ab785349..000000000
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diff --git a/lessons/L3/problem-set/09-what-is-a-stylesheet/notes.md b/lessons/L3/problem-set/09-what-is-a-stylesheet/notes.md
deleted file mode 100644
index cd74a99cb..000000000
--- a/lessons/L3/problem-set/09-what-is-a-stylesheet/notes.md
+++ /dev/null
@@ -1,36 +0,0 @@
-In the next quiz, you'll be working with a stylesheet. So what is a stylesheet and why is it important? Well, consider the following question...
-
-_What if you wanted to use the same CSS on more than one webpage?_
-
-You could just copy all of your CSS from one file and paste it into another, but that seems like a lot of extra work and doesn't scale very well. What if you decide to make changes later? You'd have to change every copy of the CSS!
-
-![there's got to be a better way...](http://udacity.github.io/fend/lessons/L3/problem-set/09-what-is-a-stylesheet/better-way-meme.jpg)
-
-While the process described above works, it's not recommended. Instead, the preferred method is to write your CSS in a file called a **stylesheet** and then link to that file in your HTML.
-
-## Stylesheets
-
-A stylesheet is a file containing the code that describes how elements on your webpage should be displayed.
-
-![example stylesheet](http://udacity.github.io/fend/lessons/L3/problem-set/09-what-is-a-stylesheet/stylesheet.jpg)
-
-This is no different than what you've been doing before, except the CSS lives in a different file... and you don't have to use the `<style>` tags anymore. To create a stylesheet, simply add a new file to your project, write some CSS, and save it as `name-of-stylesheet.css`.
-
-### How to Link to a Stylesheet
-
-Before your webpage can use the stylesheet, you need to link to it. To do this, you'll need to create a `<link>` to your stylesheet in your HTML. To create a link, simply type the following inside the `<head>` of your HTML.
-
-```html
-<link href="path-to-stylesheet/stylesheet.css" rel="stylesheet">
-```
-
-The `href` attribute specifies the **path** to the linked resource (you can link to other resources besides stylesheets, more on this later) and the `rel` attribute names the **relationship** between the resource and your document. In this case, the relationship is a stylesheet. When you're done, it will look something like this...
-
-```html
-<head>
-  <title>My Webpage</title>
-  <!-- ... -->
-  <link href="path-to-stylesheet/stylesheet.css" rel="stylesheet">
-  <!-- ... -->
-</head>
-```
\ No newline at end of file
diff --git a/lessons/L3/problem-set/09-what-is-a-stylesheet/stylesheet.jpg b/lessons/L3/problem-set/09-what-is-a-stylesheet/stylesheet.jpg
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diff --git a/lessons/L3/problem-set/10-link-to-a-stylesheet/answer.md b/lessons/L3/problem-set/10-link-to-a-stylesheet/answer.md
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+++ /dev/null
@@ -1,43 +0,0 @@
-Here's my complete solution:
-
-```html
-<!DOCTYPE html>
-<html>
-<head>
-  <title>Link to a Stylesheet Quiz</title>
-  <!-- ... -->
-  <link href="css/styles.css" rel="stylesheet">
-</head>
-<body>
-  <div class="container">
-    <div class="portfolio">
-      <h1>My Portfolio</h1>
-      <div class="item">
-        <img src="../img/out-cold.png" alt="out cold logo" width="300">
-        <span>This specific design features a 3D floating mountain above a weathered, rugged font to insinuate a winter outdoor theme. This logo would be a perfect fit for an outdoor product company or ski resort.</span>
-      </div>
-      <div class="item">
-        <img src="../img/retro-beach.png" alt="retro beach logo" width="300">
-        <span>This specific design features a beach-themed fading sunset with palm trees. The fading vertical bars in the sun resemble warmth as it fades away into the sunset.</span>
-      </div>
-    </div>
-  </div>
-</body>
-</html>
-```
-
-To link the **stylesheet**, I added the missing **link** to the `<head>` of the HTML.
-
-```html
-<head>
-  <!-- ... -->
-  <link href="css/styles.css" rel="stylesheet">
-  <!-- ... -->
-</head>
-```
-
-The `href` attribute is the **path** to the stylsheet and the `rel` attribute describes the **relationship** of the link as a stylesheet.
-
-This is how the answer looks in the browser:
-
-![link to a stylesheet solution](http://udacity.github.io/fend/lessons/L3/problem-set/10-link-to-a-stylesheet/link-to-a-stylesheet.jpg)
\ No newline at end of file
diff --git a/lessons/L3/problem-set/10-link-to-a-stylesheet/css/styles.css b/lessons/L3/problem-set/10-link-to-a-stylesheet/css/styles.css
deleted file mode 100644
index 09d8035d3..000000000
--- a/lessons/L3/problem-set/10-link-to-a-stylesheet/css/styles.css
+++ /dev/null
@@ -1,25 +0,0 @@
-body {
-	font-family: 'Roboto', sans-serif;
-}
-.container {
-	display: flex;
-	flex-wrap: wrap;
-}
-.menu {
-	width: 15%;
-}
-.portfolio {
-	width: 85%;
-}
-.item {
-	width: 100%;
-	clear: both;
-}
-.item img {
-	float: left
-}
-.item span {
-	display: table-cell;
-	vertical-align: middle;
-	height: 240px;
-}
\ No newline at end of file
diff --git a/lessons/L3/problem-set/10-link-to-a-stylesheet/image-form.jpeg b/lessons/L3/problem-set/10-link-to-a-stylesheet/image-form.jpeg
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diff --git a/lessons/L3/problem-set/10-link-to-a-stylesheet/img/retro-beach.png b/lessons/L3/problem-set/10-link-to-a-stylesheet/img/retro-beach.png
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diff --git a/lessons/L3/problem-set/10-link-to-a-stylesheet/index.html b/lessons/L3/problem-set/10-link-to-a-stylesheet/index.html
deleted file mode 100644
index f934daa19..000000000
--- a/lessons/L3/problem-set/10-link-to-a-stylesheet/index.html
+++ /dev/null
@@ -1,34 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Add a link to the stylesheet 'styles.css' at the designated spot below. -->
-
-<!-- Hints:
-
-* sample link: <link href="path-to-stylesheet/stylesheet.css" rel="stylesheet">
-* path to stylesheet: "css/styles.css"
-
--->
-
-<html>
-<head>
-	<title>Link to a Stylesheet Quiz</title>
-	<!-- the next line loads the tests for the Udacity Feedback extension -->
-	<meta name="udacity-grader" content="tests.json">
-	<!-- add link here -->
-</head>
-<body>
-	<div class="container">
-		<div class="portfolio">
-			<h1>My Portfolio</h1>
-			<div class="item">
-				<img src="img/out-cold.png" width="300">
-				<span>This specific design features a 3D floating mountain above a weathered, rugged font to insinuate a winter outdoor theme. This logo would be a perfect fit for an outdoor product company or ski resort.</span>
-			</div>
-			<div class="item">
-				<img src="img/retro-beach.png" width="300">
-				<span>This specific design features a beach-themed fading sunset with palm trees. The fading vertical bars in the sun resemble warmth as it fades away into the sunset.</span>
-			</div>
-		</div>
-	</div>
-</body>
-</html>
diff --git a/lessons/L3/problem-set/10-link-to-a-stylesheet/instructions.md b/lessons/L3/problem-set/10-link-to-a-stylesheet/instructions.md
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+++ /dev/null
@@ -1,9 +0,0 @@
-### How to Complete this Quiz
-
-1. Download the zip file called `link-to-a-stylesheet.zip` from the Supporting Materials below or from [here](http://udacity.github.io/fend/lessons/L3/problem-set/10-link-to-a-stylesheet/link-to-a-stylesheet.zip).
-2. Edit the `index.html` file by adding a link to the missing `stylesheet`.
-3. View `index.html` in the browser to see if the `stylesheet` was applied.
-4. Turn on the [Udacity Feedback Chrome Extension](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345403/modules/742847927175460/lessons/7323812069/concepts/73256617910923) (if you haven't already).
-5. When you've successfully added the stylesheet, a code will appear in the extension. Paste the code into the classroom in the next screen.
-
-When you're ready to get started, click "Skip to Quiz".
\ No newline at end of file
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-For your last quiz, you'll be linking a stylesheet to a familiar webpage from this lesson.
-
-![link to a stylesheet quiz](http://udacity.github.io/fend/lessons/L3/problem-set/10-link-to-a-stylesheet/link-to-a-stylesheet-before.jpg)
-
-_Do you remember this webpage from the very first video in this lesson?_
-
-I've already provided you with the HTML and CSS in the downloadables section.  It's your job to download the files and connect the **stylesheet** to the webpage.
-
-```html
-<html>
-<head>
-  <title>Link to a Stylesheet Quiz</title>
-  <!-- add link here -->
-</head>
-<body>
-  <!-- ... -->
-</body>
-</html>
-```
-
-In the download, `styles.css` (the stylesheet) is conveinetly tucked away in a folder called `css`. So, you will need to draw upon your knowledge of [paths](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345402/modules/735989977175460/lessons/7222405183/concepts/73276037150923) in order to correctly link the stylesheet to the HTML. If you've done everything correctly, your **link** should be formatted like...
-
-```html
-<link href="path-to-stylesheet/stylesheet.css" rel="stylesheet">
-```
\ No newline at end of file
diff --git a/lessons/L3/problem-set/10-link-to-a-stylesheet/tests.json b/lessons/L3/problem-set/10-link-to-a-stylesheet/tests.json
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-[{
-  "name" : "Link to a Stylesheet",
-  "code" : "aLINKtotheSTYLEZ",
-  "tests" : [
-    {
-      "description" : "Add link to stylesheet.",
-      "definition" : {
-        "nodes" : "link[rel=\"stylesheet\"]",
-        "attribute" : "href",
-        "equals" : "css/styles.css"
-      }
-    }       
-  ]
-}]
\ No newline at end of file
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-# Assets for How to Write Code Faster
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-Using keyboard shortcuts is one of the easiest ways to improve your workflow and become a coding ninja in the process... and it makes sense.
-
-You’re faster with keyboard shortcuts than you are with a mouse. Try them out and unlock your full potential!
-
-![keyboard shortcuts meme](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/keyboard-shortcuts-meme.jpg)
-
-Every editor comes with a ton of keyboard shortcuts that help cut down on the amount of time you spend writing code. It would be almost impossible to list all of them here, so for brevity we've highlighted the most useful commands for **Sublime Text** and **Atom**.
-
-Other editors have keyboard shortcuts too! Check out:
-
-* [Notepad++ Cheatsheet](https://drive.google.com/a/udacity.com/file/d/0B86nuTd5nMTKaENHcmliUC1kdnc/edit)
-* [Emacs Reference](https://www.gnu.org/software/emacs/refcards/pdf/refcard.pdf)
-* [Vi / Vim Cheatsheet](http://www.lagmonster.org/docs/vi.html)
-
-# Commands
-
-## Cut, Copy, Paste
-
-### Mac
-
-- Cut: ⌘ + X
-- Copy: ⌘ + C
-- Paste: ⌘ + V
-
-### Windows/Linux
-
-- Cut: Ctrl + X
-- Copy: Ctrl + C
-- Paste: Ctrl + V
-
-The classics! Stop typing the same thing over and over again. Use cut, copy, and paste.
-
-![cut, copy, and paste shortcuts gif](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/cut-copy-paste.gif)
-
-## Undo, Redo
-
-### Mac
-
-- Undo: ⌘ + Z
-- Redo: ⌘ + ⇧ + Z or ⌘ + Y
-
-### Windows/Linux
-
-- Undo: Ctrl + Z
-- Redo: Ctrl + ⇧ + Z or Ctrl + Y
-
-Make a mistake? Need to redo what you just did? No problem, just use the undo and redo commands.
-
-![undo, redo shortcuts gif](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/undo-redo.gif)
-
-## Duplicate
-
-### Mac
-
-- ⌘ + ⇧ + D with or without text highlighted
-
-### Windows/Linux
-
-- Ctrl + ⇧ + D with or without text highlighted
-
-If you’ve got text highlighted, you will copy that text specifically. If you don’t have any text highlighted, you will duplicate the line your cursor is on.
-
-![duplicate shortcut gif](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/duplicate.gif)
-
-## Select
-
-### Mac
-
-- Select Word: ⌘ + D
-- Select Line: ⌘ + L
-- Select All: ⌘ + A
-- Select Every Instance: ⌘ + Ctrl + G
-
-### Windows/Linux
-
-- Select Word: Ctrl + D
-- Select Line: Ctrl + L
-- Select All: Ctrl + A
-- Select Every Instance: Alt + F3
-
-Need to select a word, line, or entire file? Use one of these commands. If you select a word and want to continue selecting the same word, keep pressing ⌘ + D (Mac) or Ctrl + D (Windows/Linux). Want to select every instance of the same word? Press ⌘ + Ctrl + G (Mac) or Alt + F3 (Windows/Linux) to select all instances of the same word.
-
-![select shortcuts gif](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/select-word-line-all.gif)
-
-## Move Cursor
-
-### Mac
-
-- Move Cursor to Previous Word: Alt + ←
-- Move Cursor to Next Word: Alt + →
-- Move Cursor to Start of Line: ⌘ + ←
-- Move Cursor to End of Line: ⌘ + →
-- Move Cursor to Start of Document: ⌘ + ↑
-- Move Cursor to End of Document: ⌘ + ↓
-
-### Windows/Linux
-
-- Move Cursor to Previous Word: Ctrl + ←
-- Move Cursor to Next Word: Ctrl + →
-- Move Cursor to Start of Line: Home
-- Move Cursor to End of Line: End
-- Move Cursor to Start of Document: Ctrl + Home
-- Move Cursor to End of Document: Ctrl + End
-
-Use the move cursor commands to quickly traverse a document without using a mouse. Also, if you hold ⇧ (Shift) down while using the commands then the text within the move will be selected.
-
-![move cursor shortcuts gif](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/move-cursor.gif)
-
-## Jump
-
-### Mac
-
-- Jump to Opening/Closing Parentheses, Brackets, Braces: Ctrl + M
-- Jump to Definition: ⌘ + R
-
-### Windows/Linux
-
-- Jump to Opening/Closing Parentheses, Brackets, Braces: Ctrl + M
-- Jump to Definition: Ctrl + R
-
-The jump commands are useful for snapping to places in code fast! Try them out.
-
-![jump shortcuts gif](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/jump.gif)
-
-## Indent, Unindent
-
-### Mac
-
-- Indent: Tab or ⌘ + ]
-- Unindent: ⇧ + Tab or ⌘ + [
-
-### Windows/Linux
-
-- Indent: Tab or ⌘ + ]
-- Unindent: ⇧ + Tab or ⌘ + [
-
-Make your code easier to read by leveraging the indent and unindent commands.
-
-![indent, unindent shortcuts gif"](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/indent-unindent.gif)
-
-## Toggle Comment
-
-### Mac
-
-- ⌘ + /
-
-### Windows
-
-- Ctrl + /
-
-Leave comments in your code with the toggle comments command. You'll thank yourself later! Also, this is great for quickly debugging.
-
-![toggle comment shortcut gif](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/toggle-comment.gif)
-
-## Tab Management
-
-### Mac
-
-- New Tab: ⌘ + N
-- Switch Tab Left: ⌘ + ⇧ + [
-- Switch Tab Right: ⌘ + ⇧ + ]
-- Close Tab: ⌘ + W
-- Reopen Tab: ⌘ + ⇧ + T
-
-### Windows
-
-- New Tab: Ctrl + N
-- Switch Tab Left: Ctrl + PgUp
-- Switch Tab Right: Ctrl + PgDn
-- Close Tab: Ctrl + W
-- Reopen Tab: Ctrl + ⇧ + T
-
-Look like a dynamo creating new tabs, swapping between tabs, and closing tabs. Check out these commands for tab management.
-
-Also, try using these commands in your browser. They work there too! Only difference is ⌘ + N (Mac) or Ctrl + N (Windows/Linux) will open a new window in the browser and ⌘ + T (Mac) or Ctrl + T (Windows/Linux) will open a new tab.
-
-![tab management shortcuts gif](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/tab-management.gif)
-
-## Quick Open
-
-### Mac
-
-- ⌘ + P
-
-### Windows/Linux
-
-- Ctrl + P
-
-Try opening a folder inside Sublime or Atom. Notice how you can see all the files in the sidebar? That's a project! Use the sidebar or the quick open command to open the file you want to work on.
-
-![quick open shortcut gif](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/quick-open.gif)
-
-## Find
-
-### Mac
-
-- ⌘ + F
-
-### Windows
-
-- Ctrl + F
-
-Looking for a word in a file? Use the find command to search for it. Want to search the entire project? Add ⇧ (Shift) to the command.
-
-![find shortcuts gif](http://udacity.github.io/fend/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/find.gif)
-
-## Want to See More?
-
-For an entire list of Sublime’s or Atom’s keyboard shortcuts, visit the links below.
-
-### Sublime Text
-
-- http://docs.sublimetext.info/en/latest/reference/keyboard_shortcuts_osx.html (Mac)
-- http://docs.sublimetext.info/en/latest/reference/keyboard_shortcuts_win.html (Windows/Linux)
-
-### Atom
-
-- https://github.com/nwinkler/atom-keyboard-shortcuts
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diff --git a/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/quick-open.gif b/lessons/L4/concepts/02-sublime-text-and-atom-keyboard-shortcuts/quick-open.gif
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diff --git a/lessons/L4/concepts/03-practice-keyboard-shortcuts/answer.md b/lessons/L4/concepts/03-practice-keyboard-shortcuts/answer.md
deleted file mode 100644
index 0be4a030d..000000000
--- a/lessons/L4/concepts/03-practice-keyboard-shortcuts/answer.md
+++ /dev/null
@@ -1,5 +0,0 @@
-# Practice Keyboard Shortcuts
-
-![shortcuts mastered meme](http://udacity.github.io/fend/lessons/L4/concepts/03-practice-keyboard-shortcuts/shortcuts-mastered-meme.jpg)
-
-Awesome. In the next exercise, we’ll put keyboard shortcuts to the test to see how much time you can actually save by using them.
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diff --git a/lessons/L4/concepts/03-practice-keyboard-shortcuts/css/main.css b/lessons/L4/concepts/03-practice-keyboard-shortcuts/css/main.css
deleted file mode 100644
index 73f429718..000000000
--- a/lessons/L4/concepts/03-practice-keyboard-shortcuts/css/main.css
+++ /dev/null
@@ -1,255 +0,0 @@
-html {
-  font-family: sans-serif;
-  -ms-text-size-adjust: 100%;
-  -webkit-text-size-adjust: 100%;
-}
-body {
-  margin: 0;
-}
-a {
-  background-color: transparent;
-}
-b,
-strong {
-  font-weight: bold;
-}
-dfn {
-  font-style: italic;
-}
-h1 {
-  font-size: 2em;
-  margin: 0.67em 0;
-}
-mark {
-  background: #ff0;
-  color: #000;
-}
-small {
-  font-size: 80%;
-}
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline;
-}
-sup {
-  top: -0.5em;
-}
-sub {
-  bottom: -0.25em;
-}
-img {
-  border: 0;
-}
-figure {
-  margin: 1em 40px;
-}
-hr {
-  -webkit-box-sizing: content-box;
-     -moz-box-sizing: content-box;
-          box-sizing: content-box;
-  height: 0;
-}
-pre {
-  overflow: auto;
-}
-code,
-kbd,
-pre,
-samp {
-  font-family: monospace, monospace;
-  font-size: 1em;
-}
-fieldset {
-  border: 1px solid #c0c0c0;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em;
-}
-legend {
-  border: 0;
-  padding: 0;
-}
-textarea {
-  overflow: auto;
-}
-optgroup {
-  font-weight: bold;
-}
-table {
-  border-collapse: collapse;
-  border-spacing: 0;
-}
-td,
-th {
-  padding: 0;
-}
-* {
-  -webkit-box-sizing: border-box;
-  -moz-box-sizing: border-box;
-  box-sizing: border-box;
-}
-html {
-  font-size: 10px;
-  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
-}
-body {
-  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
-  font-size: 14px;
-  line-height: 1.42857143;
-  color: #333333;
-  background-color: #ffffff;
-}
-input,
-button,
-select,
-textarea {
-  font-family: inherit;
-  font-size: inherit;
-  line-height: inherit;
-}
-a {
-  color: #337ab7;
-  text-decoration: none;
-}
-figure {
-  margin: 0;
-}
-img {
-  vertical-align: middle;
-}
-hr {
-  margin-top: 20px;
-  margin-bottom: 20px;
-  border: 0;
-  border-top: 1px solid #eeeeee;
-}
-h1,
-h2,
-h3,
-h4,
-h5,
-h6 {
-  font-family: inherit;
-  font-weight: 500;
-  line-height: 1.1;
-  color: inherit;
-}
-h1,
-h2,
-h3 {
-  margin-top: 20px;
-  margin-bottom: 10px;
-}
-h4,
-h5,
-h6 {
-  margin-top: 10px;
-  margin-bottom: 10px;
-}
-h1 {
-  font-size: 36px;
-}
-h2 {
-  font-size: 30px;
-}
-h3 {
-  font-size: 24px;
-}
-h4 {
-  font-size: 18px;
-}
-h5 {
-  font-size: 14px;
-}
-h6 {
-  font-size: 12px;
-}
-p {
-  margin: 0 0 10px;
-}
-ul,
-ol {
-  margin-top: 0;
-  margin-bottom: 10px;
-}
-ul ul,
-ol ul,
-ul ol,
-ol ol {
-  margin-bottom: 0;
-}
-blockquote {
-  padding: 10px 20px;
-  margin: 0 0 20px;
-  font-size: 17.5px;
-  border-left: 5px solid #eeeeee;
-}
-address {
-  margin-bottom: 20px;
-  font-style: normal;
-  line-height: 1.42857143;
-}
-code,
-kbd,
-pre,
-samp {
-  font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
-}
-code {
-  padding: 2px 4px;
-  font-size: 90%;
-  color: #c7254e;
-  background-color: #f9f2f4;
-  border-radius: 4px;
-}
-kbd {
-  padding: 2px 4px;
-  font-size: 90%;
-  color: #ffffff;
-  background-color: #333333;
-  border-radius: 3px;
-  -webkit-box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.25);
-          box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.25);
-}
-kbd kbd {
-  padding: 0;
-  font-size: 100%;
-  font-weight: bold;
-  -webkit-box-shadow: none;
-          box-shadow: none;
-}
-pre {
-  display: block;
-  padding: 9.5px;
-  margin: 0 0 10px;
-  font-size: 13px;
-  line-height: 1.42857143;
-  word-break: break-all;
-  word-wrap: break-word;
-  color: #333333;
-  background-color: #f5f5f5;
-  border: 1px solid #cccccc;
-  border-radius: 4px;
-}
-pre code {
-  padding: 0;
-  font-size: inherit;
-  color: inherit;
-  white-space: pre-wrap;
-  background-color: transparent;
-  border-radius: 0;
-}
-table {
-  background-color: transparent;
-}
-caption {
-  padding-top: 8px;
-  padding-bottom: 8px;
-  color: #777777;
-  text-align: left;
-}
-th {
-  text-align: left;
-}
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diff --git a/lessons/L4/concepts/03-practice-keyboard-shortcuts/image-form.jpeg b/lessons/L4/concepts/03-practice-keyboard-shortcuts/image-form.jpeg
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diff --git a/lessons/L4/concepts/03-practice-keyboard-shortcuts/index.html b/lessons/L4/concepts/03-practice-keyboard-shortcuts/index.html
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--- a/lessons/L4/concepts/03-practice-keyboard-shortcuts/index.html
+++ /dev/null
@@ -1,42 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="UTF-8">
-    <title>Keyboard Shortcuts - Practice</title>
-    <link rel="stylesheet" type="text/css" href="css/main.css" media="screen">
-    <style>
-        body {
-            padding: 0 20px 0 20px;
-        }
-    </style>
-</head>
-<body>
-    <h1>HTML Ipsum Presents</h1>
-           
-    <p><strong>Pellentesque habitant morbi tristique</strong> senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. <em>Aenean ultricies mi vitae est.</em> Mauris placerat eleifend leo. Quisque sit amet est et sapien ullamcorper pharetra. Vestibulum erat wisi, condimentum sed, <code>commodo vitae</code>, ornare sit amet, wisi. Aenean fermentum, elit eget tincidunt condimentum, eros ipsum rutrum orci, sagittis tempus lacus enim ac dui. <a href="#">Donec non enim</a> in turpis pulvinar facilisis. Ut felis.</p>
-
-    <h2>Header Level 2</h2>
-               
-    <ol>
-       <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
-       <li>Aliquam tincidunt mauris eu risus.</li>
-    </ol>
-
-    <blockquote><p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est.</p></blockquote>
-
-    <h3>Header Level 3</h3>
-
-    <ul>
-       <li>Lorem ipsum dolor sit amet, consectetuer adipiscing elit.</li>
-       <li>Aliquam tincidunt mauris eu risus.</li>
-    </ul>
-
-    <pre><code>
-    #header h1 a { 
-        display: block; 
-        width: 300px; 
-        height: 80px; 
-    }
-    </code></pre>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L4/concepts/03-practice-keyboard-shortcuts/instructions.md b/lessons/L4/concepts/03-practice-keyboard-shortcuts/instructions.md
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index 18579520e..000000000
--- a/lessons/L4/concepts/03-practice-keyboard-shortcuts/instructions.md
+++ /dev/null
@@ -1,7 +0,0 @@
-### How to Complete this Quiz
-
-1. Download the zip file called `practice-keyboard-shortcuts.zip` from the resources section or from [here](http://udacity.github.io/fend/lessons/L4/concepts/03-practice-keyboard-shortcuts/practice-keyboard-shortcuts.zip).
-2. Open `index.html` and `main.css` and practice using the keyboard shortcuts from the previous lesson.
-3. When you're finished practicing, you've completed the quiz.
-
-When you're ready to get started, click "Skip to Quiz".
\ No newline at end of file
diff --git a/lessons/L4/concepts/03-practice-keyboard-shortcuts/practice-keyboard-shortcuts.zip b/lessons/L4/concepts/03-practice-keyboard-shortcuts/practice-keyboard-shortcuts.zip
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diff --git a/lessons/L4/concepts/03-practice-keyboard-shortcuts/question.md b/lessons/L4/concepts/03-practice-keyboard-shortcuts/question.md
deleted file mode 100644
index 7227bbff7..000000000
--- a/lessons/L4/concepts/03-practice-keyboard-shortcuts/question.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# Practice Keyboard Shortcuts
-
-Ready to unlock your full potential? Download `keyboard-shortcuts.zip` and practice using the keyboard shortcuts from the previous section. If you need help, use the .gif examples to follow along to make sure you’re using the commands correctly.
\ No newline at end of file
diff --git a/lessons/L4/concepts/03-practice-keyboard-shortcuts/shortcuts-mastered-meme.jpg b/lessons/L4/concepts/03-practice-keyboard-shortcuts/shortcuts-mastered-meme.jpg
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diff --git a/lessons/L4/concepts/04-keyboard-shortcuts/finish.html b/lessons/L4/concepts/04-keyboard-shortcuts/finish.html
deleted file mode 100644
index 9f28a4e33..000000000
--- a/lessons/L4/concepts/04-keyboard-shortcuts/finish.html
+++ /dev/null
@@ -1,34 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="UTF-8">
-	<title>Typing Challenge</title>
-</head>
-<body>
-	<div>
-		<ul>
-			<li><a href="#">Home</a></li>
-			<li><a href="#">About</a></li>
-			<li><a href="#">Clients</a></li>
-			<li><a href="#">Contact Us</a></li>
-		</ul>
-	</div>
-	<div>
-		<div class="article">
-			<h1>Knight Rider</h1>
-			<p>Michael Knight a young loner on a crusade to champion the cause of the innocent.</p>
-			<a href="#">Read more +</a>
-		</div>
-		<div class="article">
-			<h1>Robin Hood</h1>
-			<p>Fightin' the system like a true modern day Robin Hood.</p>
-			<a href="#">Read more +</a>
-		</div>
-		<div class="article">
-			<h1>Addams Family</h1>
-			<p>They really are a scream the Addams Family.</p>
-			<a href="#">Read more +</a>
-		</div>
-	</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L4/concepts/04-keyboard-shortcuts/image-form.jpeg b/lessons/L4/concepts/04-keyboard-shortcuts/image-form.jpeg
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diff --git a/lessons/L4/concepts/04-keyboard-shortcuts/instructions.md b/lessons/L4/concepts/04-keyboard-shortcuts/instructions.md
deleted file mode 100644
index 106b80470..000000000
--- a/lessons/L4/concepts/04-keyboard-shortcuts/instructions.md
+++ /dev/null
@@ -1,15 +0,0 @@
-### How to Complete the Quiz
-
-1. Download the files `start.html` and `finish.html` from the resources section or the .zip file from [here](http://udacity.github.io/fend/lessons/L4/concepts/04-keyboard-shortcuts/keyboard-shortcuts.zip).
-2. Open `start.html` and `finish.html` and place them side-by-side.
-
- * If you have two monitors, you can do this split-screen.
- * If you're using Sublime set your layout to two columns by navigating to `View → Layout → Columns: 2`.
- * If you're using Atom, add another pane by navigating to `View → Panes → Split Left` or `View → Panes → Split Right`.
- * If your screen is not big enough, print out `finish.html` and open `start.html` in your text editor.
-
-3. Using only your keyboard, but **no keyboard shortcuts**, edit `start.html` to match `finish.html` exactly. Make sure to time yourself to see how long it takes. When you're finished, record your time **in seconds.**
-4. Repeat Step 3, but this time **use keyboard shortcuts**. Again, make sure to time yourself and record your time **in seconds** once you're done.
-5. On the next slide, enter your best times with and without keyboard shortcuts.
-
-Remember, **only use your keyboard!** Don’t just copy and paste the code from the second file, that’d be cheating. Feel free to complete the challenge as many as times as you'd like to improve your time. When you're ready to get started, click "Skip to Quiz". 👟  Have fun!
\ No newline at end of file
diff --git a/lessons/L4/concepts/04-keyboard-shortcuts/keyboard-shortcuts.zip b/lessons/L4/concepts/04-keyboard-shortcuts/keyboard-shortcuts.zip
deleted file mode 100644
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diff --git a/lessons/L4/concepts/04-keyboard-shortcuts/question.md b/lessons/L4/concepts/04-keyboard-shortcuts/question.md
deleted file mode 100644
index b8c106745..000000000
--- a/lessons/L4/concepts/04-keyboard-shortcuts/question.md
+++ /dev/null
@@ -1,5 +0,0 @@
-## Keyboard Shortcuts Quiz
-
-Still don’t think keyboard shortcuts are a big deal? Let’s put them to the test!
-
-For this quiz, you'll be competing against yourself in a timed challenge to see how fast you can type with and without keyboard shortcuts. Since this is a timed challenge, you'll need to have a stopwatch ⏰ . If you have a smart phone, it should come with stopwatch feature, but if not, use [this link](https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=stopwatch) to use Google's stopwatch.
\ No newline at end of file
diff --git a/lessons/L4/concepts/04-keyboard-shortcuts/start.html b/lessons/L4/concepts/04-keyboard-shortcuts/start.html
deleted file mode 100644
index 11ad33d9d..000000000
--- a/lessons/L4/concepts/04-keyboard-shortcuts/start.html
+++ /dev/null
@@ -1,33 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="UTF-8">
-	<title>Typing Challenge</title>
-</head>
-<body>
-	<div>
-		<ul>
-			<li><a href="#">Home</a></li>
-			<li><a href="#">About</a></li>
-			<!-- missing links here -->
-		</ul>
-	</div>
-	<div>
-<!-- should be tabbed over -->
-<div class="article">
-<h1>Knight Rider</h1>
-<p>Michael Knight a young loner on a crusade to champion the cause of the innocent.</p>
-<a href="#">Read more +</a>
-</div>
-
-<!-- missing article -->
-
-<!-- should be tabbed over -->
-<div class="article">
-<h1>Addams Family</h1>
-<p>They really are a scream the Addams Family.</p>
-<a href="#">Read more +</a>
-</div>	
-	</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L4/concepts/05-extending-sublime-text-and-atom/emmet.gif b/lessons/L4/concepts/05-extending-sublime-text-and-atom/emmet.gif
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diff --git a/lessons/L4/concepts/05-extending-sublime-text-and-atom/no-highlighting.jpg b/lessons/L4/concepts/05-extending-sublime-text-and-atom/no-highlighting.jpg
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diff --git a/lessons/L4/concepts/05-extending-sublime-text-and-atom/notes.md b/lessons/L4/concepts/05-extending-sublime-text-and-atom/notes.md
deleted file mode 100644
index c4c24390d..000000000
--- a/lessons/L4/concepts/05-extending-sublime-text-and-atom/notes.md
+++ /dev/null
@@ -1,23 +0,0 @@
-# Extending your Code Editor
-
-By default, Sublime and Atom come with great features like keyboard shortcuts and multi-line editing, but what makes these tools even more powerful is their ability to be extended with packages and themes.
-
-## Packages
-
-Packages are used to extend the functionality of your text editor. Are you tired of typing out every element in HTML? There’s a package that can help with that. Wish your text editor could tell you if you forgot a semicolon at the end of a line? There’s a package for that too!
-
-![packages example gif](http://udacity.github.io/fend/lessons/L4/concepts/05-extending-sublime-text-and-atom/emmet.gif)
-
-## Themes
-
-You’ve probably noticed this by now, but when using Sublime or Atom, specific pieces of your code are colored and styled differently. This is called syntax highlighting, and it is a common feature used by text editors. Syntax highlighting makes code more readable and it can actually help when debugging.
-
-### No Hightlighting
-
-![alt text](http://udacity.github.io/fend/lessons/L4/concepts/05-extending-sublime-text-and-atom/no-highlighting.jpg "No Highlighting")
-
-### Syntax Highlighting
-
-![alt text](http://udacity.github.io/fend/lessons/L4/concepts/05-extending-sublime-text-and-atom/syntax-highlighting.jpg "Syntax Highlighting")
-
-Themes are a way for you to customize how the syntax highlighting works in your text editor. There are literally thousands of themes out there for you to pick from or you can create your own.
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-# Installing Packages and Themes
-
-Read the instructions below for how to install packages and themes in Sublime or Atom. If you’re using a different text editor, you’ll need to refer to their documentation.
-
-## Sublime Text
-
-In Sublime, packages can be installed using Package Control. Package Control is an open-source tool that manages packages in Sublime. You can download it by clicking [this link](https://packagecontrol.io/ "Package Control") and following the instructions.
-
-After you’ve installed Package Control and restarted Sublime, you can access it by launching the Command Palette and typing Package Control. To open the Command Palette, press ⌘ + ⇧ + P (Mac) or Ctrl + ⇧ + P (Windows/Linux). Once there, you will be able to issue commands for installing, removing, and listing packages.
-
-![alt text](http://udacity.github.io/fend/lessons/L4/concepts/06-installing-packages-and-themes/install-packages-sublime.gif "Install Packages in Sublime Gif")
-
-## Atom
-
-To install packages and themes in Atom, simply navigate to Atom → Preferences and click on the “Install” tab. From there, you can toggle between searching for packages and themes.
-
-![alt text](http://udacity.github.io/fend/lessons/L4/concepts/06-installing-packages-and-themes/install-packages-atom.gif "Install Packages in Atom Gif")
-
-After you’ve installed a package or theme, you can click on their associated tabs from Settings to manage them. If you'd like more help getting started, check out [Atom's documentation](https://atom.io/docs/latest/using-atom-atom-packages "Atom Documentation").
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-# Recommended Packages
-
-Sublime and Atom have thousands of packages available to install, but figuring out which ones to use can be a task in itself. So, below we’ve recommended some packages that you will definitely want to install (these packages are available in both Sublime and Atom). **After you install a package, make sure to restart your text editor in order for the changes to take effect.**
-
-## Emmet
-
-Emmet is a plugin for text editors that enables web developers to write HTML and CSS code faster. It does this by expanding simple CSS-like abbreviations into complex HTML and CSS code snippets.
-
-![emmet gif](http://udacity.github.io/fend/lessons/L4/concepts/07-recommended-packages/emmet.gif)
-
-Emmet is a must-use for any web developer. To learn more about how Emmet works, check out [this article](https://www.smashingmagazine.com/2013/03/goodbye-zen-coding-hello-emmet/) written by Smashing Magazine or visit [Emmet’s official website](http://emmet.io/).
-
-## Color Highlighter
-
-Color Highlighter is a plugin for Sublime, which unobtrusively previews color values in your code. Also, Color Highlighter comes with a built-in color picker and color format converter (hex, rgb, etc.) to make changing colors a breeze.
-
-![color highlighter gif](http://udacity.github.io/fend/lessons/L4/concepts/07-recommended-packages/color-highlighter.gif)
-
-To read more about Color Highlighter, check out their [GitHub repo](https://github.com/Monnoroch/ColorHighlighter) or visit their page on the [Package Control website](https://packagecontrol.io/packages/Color%20Highlighter).
-
-## Pigments
-
-Pigments is a plugin for Atom that displays color in code. Similar to Color Highlighter for Sublime, Pigments unobtrusively previews color values in your code. Also, Pigments will scan source files in your project directories looking for colors and will build a palette with all of them. That’s pretty sweet!
-
-![pigments gif](http://udacity.github.io/fend/lessons/L4/concepts/07-recommended-packages/pigments.gif)
-
-To find out more about Pigments, visit their [official page](https://atom.io/packages/pigments) on Atom’s website.
-
-## Sublime Tutor
-
-Sublime Tutor is an interactive, in-editor keyboard shortcuts tutorial for Sublime Text 3. Do you want more practice using keyboard shortuts? Are you insterested in learning even more shortcuts than what is covered in this lesson? If so, install Sublime Tutor and get started!
-
-![sublime tutor image](http://udacity.github.io/fend/lessons/L4/concepts/07-recommended-packages/sublime-tutor.png)
-
-Sublime Text 3 is required for this package. If you haven't upgraded to Sublime Text 3, you can download [here](https://www.sublimetext.com/3).
-
-### Want More Packages?
-
-If you want to see the complete list of packages available in Sublime, head on over to [https://packagecontrol.io/](https://packagecontrol.io/).
-
-If you are looking for packages in Atom, you can simply visit [their website](https://atom.io/) and search for them there.
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+++ /dev/null
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-# Recommended Themes
-
-Want your syntax highlighting to stand out? Below we’ve selected some of our favorite themes that we use here at Udacity. No theme is right or wrong, it’s really up to personal preference.
-
-## Monokai
-
-Based on the original TextMate theme designed by [Wimer Hazenberg](https://twitter.com/monokai), Monokai has become widely popular over the years. Monokai is the default color scheme used by Sublime; however, it is widely available on most text editors and IDEs.
-
-![alt text](http://udacity.github.io/fend/lessons/L4/concepts/08-recommended-themes/monokai.png "Monokai Theme")
-
-## Solarized
-
-Solarized is a sixteen color palette (eight monotones, eight accent colors) designed by [Ethan Schoonover](https://twitter.com/ethanschoonover) for use with terminal and GUI applications. The color scheme uses both precise lightness relationships and a refined set of hues based on fixed color wheel relationships.
-
-![alt text](http://udacity.github.io/fend/lessons/L4/concepts/08-recommended-themes/solarized.png "Solarized Theme")
-
-## Udacity
-
-Prefer to use the same theme as the Udacity faithful? Check out the Udacity theme in Atom!
-
-![alt text](http://udacity.github.io/fend/lessons/L4/concepts/08-recommended-themes/udacity.png "Udacity Theme")
-
-### Want More Themes?
-
-Check out [http://colorsublime.com/](http://colorsublime.com/) to find more themes to make your Sublime text awesome!
-
-If you are looking for themes in Atom, you can simply visit [their website](https://atom.io/) and search for them there.
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-### How to Complete this Quiz
-
-- In the classroom, enter the name of your favorite theme in the text box.
-
-When you're ready to get started, click "Skip to Quiz".
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-What's your favorite theme? We want to know!
-
-In the end, it's really all subjective, but it's still interesting to know what themes are the most popular amongst our students.
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-# Assets for Box Model and Semantic Elements
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-* {
-	box-sizing: border-box;	
-}
-
-body {
-	font-family: 'Open Sans';
-	font-size: 14px;
-	margin: 0;
-	padding: 0;
-	background-color: #f9f9f9;
-}
-
-h1, h2, h3, h4, h5, h6 {
-	line-height: 1em;
-	margin: 0;
-}
-
-h1 { font-size: 64px; }
-h2 { font-size: 48px; }
-h3 { font-size: 32px; }
-h4 { font-size: 28px; }
-
-address {
-	font-style: normal;
-	font-size: 13px;
-	margin-bottom: 2em;
-	color: #555;
-}
-
-article {
-	border: 1px solid #dadada;
-	border-radius: 3px;
-	box-shadow: 0 1px 3px #dadada;
-	background-color: #fff;
-	padding: 20px;
-}
-
-article p:first-child {
-	margin-top: 0;
-}
-
-article p:last-child {
-	margin-bottom: 0;
-}
-
-figure {
-	margin: 0 0 2em 0;
-}
-
-figcaption {
-	font-style: italic;
-}
-
-p {
-	line-height: 2em;
-}
-
-hr {
-	margin: 5em 0;
-}
-
-header {
-	width: 100%;
-}
-
-main {
-	max-width: 800px;
-	margin: 0 auto;
-}
-
-nav {
-	height: 60px;
-	width: 100%;
-	margin: 2em 0;
-	border-top: 1px solid #dadada;
-	border-bottom: 1px solid #dadada;
-	background-color: #fff;
-}
-
-footer {
-	text-align: center;
-	margin: 5em 0;
-}
-
-.menu {
-	width: 800px;
-	margin: 0 auto;
-	padding: 0;
-	list-style-type: none;
-}
-
-.menu > li {
-	float: left;
-	position: relative;
-	display: block;
-	padding: 10px;
-	line-height: 38px;
-}
-
-.menu > li:first-child {
-	padding: 10px 10px 10px 0;
-}
-
-.menu > li > a {
-	text-decoration: none;
-	font-size: 16px;
-	color: rgba(0, 0, 0, .3);
-}
-
-.menu > li > a.selected {
-	font-weight: bold;
-	color: #000;
-}
-
-.title {
-	margin-bottom: 0.5em;
-}
-
-.author {
-	color: #555;
-	text-transform: uppercase;
-	text-decoration: none;
-	font-weight: bold;
-}
-
-.author:hover {
-	text-decoration: underline;
-}
-
-.city {
-	font-weight: bold;
-	text-transform: uppercase;
-	color: #000;
-}
-
-.teaser {
-	border: 1px solid #dadada;
-	border-radius: 3px;
-	background-color: #fff;
-	padding: 20px;
-	color: #858585;
-}
-
-.top {
-	width: 800px;
-	margin: 0 auto;
-}
-
-.logo {
-	width: 60%;
-	margin: 3em 0 1em;
-}
-
-.more {
-	text-align: right;
-	margin-top: 1em; 
-}
-
-.more a {
-	color: #02b3e4;
-}
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-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Guess the Render</title>
-	<link href='https://fonts.googleapis.com/css?family=Open+Sans:400,700' rel='stylesheet' type='text/css'>
-	<link href="css/guess-the-render.css" rel="stylesheet">
-</head>
-<body>
-	<header>
-		<div class="top">
-			<img class="logo" src="img/udacity-logo.png" alt="udacity logo">
-		</div>
-		<nav>
-			<ul class="menu">
-				<li><a class="selected" href="#">Home</a></li>
-				<li><a href="#">Featured</a></li>
-				<li><a href="#">Entertainment</a></li>
-				<li><a href="#">Sports</a></li>
-				<li><a href="#">Health</a></li>
-				<li><a href="#">Money</a></li>
-			</ul>
-		</nav>
-	</header>
-	<main>
-		<article>
-			<h2 class="title">Sam Drake Loves Cats So Much, Adopts 30 Cats</h2>
-			<address>
-				by <a href="#" class="author">Elena Fisher</a><br>
-				<time datetime="2016-04-04T9:15">9:15 AM, Tues April 4, 2016</time>
-			</address>
-			<figure>
-				<img src="img/cats.jpg" alt="adopted cats">
-				<figcaption>Some of the cats hanging out at the the Human Animal Shelter</figcaption>
-			</figure>
-			<div class="teaser">
-				<p><span class="city">San Francisco</span>—A local hero came out of the crowd today at the Humane Animal Shelter Society of San Francisco, California, where local resident Sam Drake adopted 30 cats of various breeds and ages during a charity event.</p>
-				<p>Adopting the cats was absolutely free, but taking care of the cats will be a major endeavour. A local bystander claims that Drake could not decide on which cat to take home, and eventually decided to just take them all. When asked what Drake planned to do with the feline friends, Sam replied "they are going to help me with my rat problem!"</p>
-				<q>they [the cats] are going to help me with my rat problem!</q>
-				<p>Sam, who admits to spending most of the day on Facebook, added "I am so happy to have all of these new friends. I've already got all of their names picked out."</p>
-			</div>
-			<div class="more">
-				<span>Share on: </span>
-				<a href="#" class="">Facebook</a> <a href="#" class="">Twitter</a> <a href="#" class="">LinkedIn</a> |
-				<a href="#" class="read-more">Read more...</a>
-			</div>
-		</article>
-		<hr>
-		<article>
-			<h2 class="title">Newcomer Charlie Cutter Wins Local Golf Tournament against Pros at Pebble Beach</h2>
-			<address>
-				by <a href="#" class="author">Chloe Frazer</a><br>
-				<time datetime="2016-04-03T15:30">3:30 PM, Mon April 3, 2016</time>
-			</address>
-			<figure>
-				<img src="img/golf.jpg" alt="golf club">
-				<figcaption>Players teed up all weekend to compete</figcaption>
-			</figure>
-			<div class="teaser">
-				<p><span class="city">Pebble Beach</span>—Charlie Cutter shock and awed crowds at Pebble Beach, California Golf Course by posting a course record setting 59 to beat the number 1 Tiger Woods, number 2 Phil Michelson, and number 3 Steve Stricker, along with Sergio Garcia, Padraig Harrington, and Camilo Villegas. Many other professional golfers also attended the game.</p>
-				<p>Charlie Cutter chipped in for an eagle to start off the day at two under. Then he delivered back to back birdies on holes two, three, and four. He continued to play well for the rest of the day, to post a course record breaking 59. This all happened on a Monday morning non-media notified event with only a select few of the world's best golfers on the field. Charlie Cutter was unavailable for interviews, but all we can say is that Charlie Cutter is soon to be a name to look out for in the world of golf to come.</p>
-			</div>
-			<div class="more">
-				<span>Share on: </span>
-				<a href="#" class="">Facebook</a> <a href="#" class="">Twitter</a> <a href="#" class="">LinkedIn</a> |
-				<a href="#" class="read-more">Read more...</a>
-			</div>
-		</article>
-		<hr>
-	</main>
-	<footer>© Udacity Fake News 2016 · All rights reserved.</footer>
-</body>
-</html>
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--- a/lessons/L5/concepts/01-guess-the-render-game/james-render/fixed.css
+++ /dev/null
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\ No newline at end of file
diff --git a/lessons/L5/concepts/01-guess-the-render-game/james-render/fixed.html b/lessons/L5/concepts/01-guess-the-render-game/james-render/fixed.html
deleted file mode 100644
index 7e61b2f06..000000000
--- a/lessons/L5/concepts/01-guess-the-render-game/james-render/fixed.html
+++ /dev/null
@@ -1,53 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Fixed Div Soup</title>
-	<link rel="stylesheet" href="fixed.css">
-</head>
-<body>
-	<header class="first">
-		<nav>
-			<a class="fancy" href="#"><span></span>T's Tea Bazaar</a>
-			<a href="#">Black</a>
-			<a href="#">Green</a>
-			<a href="#">Herbal</a>
-			<a href="#">Store</a>
-		</nav>
-	</header>
-	<section class="teabags"><span class="batman">Certified Organic and Fair Trade Tea</span></section>
-	<section class="exp">Your cup of tea is your sanctuary, and we believe that only the best quality should reach your senses. That's why we hand-select our leaves for taste, aroma, and color to give you the most satisfying experience. We work with our partners to make sure you are getting 100% organic tea, grown with love by happy people!</section>
-	<section class="in">
-		<article class="sel">
-			<h3 class="pre">Our Selection</h3>
-			<p>Check out our vast selection of the best teas you will ever experience! We have hundreds of varieties of black, green, and herbal tea.</p>
-	  	</article>
-		<article class="store">
-			<h3 class="pre">The Shop</h3>
-			<p>Browse in our store for your new favorite tea accessories. We have a tasteful selection of teapots, cups, and other odds and ends you won't be able to live without!</p>
-		</article>
-		<article class="soon">
-			<h3 class="pre">Coming Soon!</h3>
-			<p>You will soon be able to make custom tea mixes! Become a tea alchemist and combine your favorite flavors for a truly unique experience. Check back every week for a custom <span class="pre-s">tea of the week</span> by our own lovely staff.</p>
-		</article>
-	</section>
-	<section class="in">
-		<div class="set"></div>
-		<div class="bot"></div>
-		<div class="pick">
-			<h3 class="pre">Our Teas Are:</h3>
-			<ul>
-				<li>Certified Organic</li>
-				<li>Fair Trade</li>
-				<li>Delicious</li>
-			</ul>
-		</div>
-	</section>
-	<section class="tee">
-	</section>
-	<footer class="con">
-		<h3 class="pre">Contact:</h3>
-		<p><span class="pre-s">email:</span> info@tsteabazaar.com</p>
-		<p><span class="pre-s">phone:</span> 415-555-4266</p>
-	</footer>
-</body>
\ No newline at end of file
diff --git a/lessons/L5/concepts/01-guess-the-render-game/james-render/index.html b/lessons/L5/concepts/01-guess-the-render-game/james-render/index.html
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--- a/lessons/L5/concepts/01-guess-the-render-game/james-render/index.html
+++ /dev/null
@@ -1,45 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Guess the Render</title>
-	<link rel="stylesheet" href="style.css">
-</head>
-<body>
-	<div class="first">
-		<div class="fancy"><div></div>T's Tea Bazaar</div>
-		<div>Black</div>
-		<div>Green</div>
-		<div>Herbal</div>
-		<div>Store</div>
-	</div>
-	<div class="teabags"><p class="batman">Certified Organic and Fair Trade Tea</p></div>
-	<div class="exp">Your cup of tea is your sanctuary, and we believe that only the best quality should reach your senses. That's why we hand-select our leaves for taste, aroma, and color to give you the most satisfying experience. We work with our partners to make sure you are getting 100% organic tea, grown with love by happy people!</div>
-	<div class="in">
-		<div class="sel">
-			<div class="pre">Our Selection</div>Check out our vast selection of the best teas you will ever experience! We have hundreds of varieties of black, green, and herbal tea.
-	  	</div>
-		<div class="store">
-			<div class="pre">The Shop</div>Browse in our store for your new favorite tea accessories. We have a tasteful selection of teapots, cups, and other odds and ends you won't be able to live without!
-		</div>
-		<div class="soon">
-			<div class="pre">Coming Soon!</div>You will soon be able to make custom tea mixes! Become a tea alchemist and combine your favorite flavors for a truly unique experience. Check back every week for a custom <div class="pre-s">tea of the week</div> by our own lovely staff.
-		</div>
-	</div>
-	<div class="in">
-		<div class="set"></div>
-		<div class="bot"></div>
-		<div class="con">
-			<p class="pre">Contact:</p>
-			<p><div class="pre-s">email:</div> info@tsteabazaar.com</p>
-			<p><div class="pre-s">phone:</div> 415-555-4266</p>
-		</div>
-		<div class="pick">
-			<div class="pre">Our Teas Are:</div>
-			<p>Certified Organic</p>
-			<p>Fair Trade</p>
-			<p>Delicious</p>
-		</div>
-	</div>
-	<div class="tee"></div>
-</body>
\ No newline at end of file
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+++ /dev/null
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-/*
-Attribution: All images provided by pixabay - https://pixabay.com
-*/
-
-* {
-  font-family: sans-serif;
-  margin: 0;
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-.fancy>div:first-child {
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-.fancy {
-  font-family: cursive;
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-.teabags {
-  background: url('./tea-1.jpg') no-repeat center;
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-.batman {
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diff --git a/lessons/L5/concepts/04-whos-the-winner/cam-animation-gtr.mp4 b/lessons/L5/concepts/04-whos-the-winner/cam-animation-gtr.mp4
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diff --git a/lessons/L5/concepts/04-whos-the-winner/notes.md b/lessons/L5/concepts/04-whos-the-winner/notes.md
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+++ /dev/null
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-And the winner is... Cameron!
-
-## You decide!
-
-... but what do you think? Did Cameron earn a clean victory? Did James pull off the upset with the cards stacked against him? Compare their solutions and you decide! Who do you think did a better job at guessing the render?
-
-<br>
-
-<video width="100%" autoplay loop >
-  <source src="http://udacity.github.io/fend/lessons/L5/concepts/04-whos-the-winner/cam-animation-gtr.mp4" type="video/mp4">
-  Your browser does not support the video tag.
-</video>
-
-_Cam's solution. Here's a link to the [original render](http://udacity.github.io/fend/lessons/L5/concepts/01-guess-the-render-game/camerons-render/index.html)._
-
-<br>
-
-<video width="100%" autoplay loop >
-  <source src="http://udacity.github.io/fend/lessons/L5/concepts/04-whos-the-winner/james-animation-gtr.mp4" type="video/mp4">
-  Your browser does not support the video tag.
-</video>
-
-_James' solution. Here's a link to the [original render](http://udacity.github.io/fend/lessons/L5/concepts/01-guess-the-render-game/james-render/index.html)_
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--- a/lessons/L5/concepts/06-boxes-on-the-web/notes.md
+++ /dev/null
@@ -1,8 +0,0 @@
-### Related Links
-
-- [d3.js Gallery](https://github.com/d3/d3/wiki/Gallery)
-- [d3.js Chord Diagram](http://bl.ocks.org/mbostock/4062006)
-
-<br>
-
-How did James hover over elements to see them in DevTools? This button: <img src="http://udacity.github.io/fend/lessons/L5/concepts/06-boxes-on-the-web/dev-tools-hover-enabled.png" alt="icon of a cursor entering a square">. It generally shows up in the top left corner of DevTools.
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deleted file mode 100644
index 401ef462c..000000000
--- a/lessons/L5/concepts/07-the-box-model/box-model.html
+++ /dev/null
@@ -1,40 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Box Model</title>
-    <link href="css/box-model.css" rel="stylesheet">
-</head>
-<body>
-    <div class="metrics">
-        <div class="margin" style="background-color: rgba(246, 178, 107, 0.658824);">
-            <div class="label">margin</div>
-            <div class="top">‒</div>
-            <br>
-            <div class="left">‒</div>
-            <div class="border" style="background-color: rgba(255, 229, 153, 0.658824);">
-                <div class="label">border</div>
-                <div class="top">‒</div>
-                <br>
-                <div class="left">‒</div>
-                <div class="padding" style="background-color: rgba(147, 196, 125, 0.54902);">
-                    <div class="label">padding</div>
-                    <div class="top">‒</div>
-                    <br>
-                    <div class="left">‒</div>
-                    <div class="content" style="background-color: rgba(111, 168, 220, 0.658824);">content</div>
-                    <div class="right">‒</div>
-                    <br>
-                    <div class="bottom">‒</div>
-                </div>
-                <div class="right">‒</div>
-                <br>
-                <div class="bottom">‒</div>
-            </div>
-            <div class="right">‒</div>
-            <br>
-            <div class="bottom">‒</div>
-        </div>
-    </div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L5/concepts/07-the-box-model/css/box-model.css b/lessons/L5/concepts/07-the-box-model/css/box-model.css
deleted file mode 100644
index 5ddef30c0..000000000
--- a/lessons/L5/concepts/07-the-box-model/css/box-model.css
+++ /dev/null
@@ -1,98 +0,0 @@
-div {
-	padding: 0;
-	margin: 0;
-	line-height: 26px;
-}
-
-.metrics {
-	padding: 8px;
-	font-size: 10px;
-	text-align: center;
-	white-space: nowrap;
-	max-width: 580px;
-}
-
-.metrics .label {
-	position: absolute;
-	font-size: 10px;
-	margin-left: 3px;
-	padding-left: 2px;
-	padding-right: 2px;
-}
-
-.metrics .position {
-	border: 1px rgb(66%, 66%, 66%) dotted;
-	background-color: white;
-	display: inline-block;
-	text-align: center;
-	padding: 3px;
-	margin: 3px;
-}
-
-.metrics .margin {
-	border: 1px dashed;
-	background-color: white;
-	display: inline-block;
-	text-align: center;
-	vertical-align: middle;
-	padding: 3px;
-	margin: 3px;
-}
-
-.metrics .border {
-	border: 1px black solid;
-	background-color: white;
-	display: inline-block;
-	text-align: center;
-	vertical-align: middle;
-	padding: 3px;
-	margin: 3px;
-}
-
-.metrics .padding {
-	border: 1px grey dashed;
-	background-color: white;
-	display: inline-block;
-	text-align: center;
-	vertical-align: middle;
-	padding: 3px;
-	margin: 3px;
-}
-
-.metrics .content {
-	position: static;
-	border: 1px gray solid;
-	background-color: white;
-	display: inline-block;
-	text-align: center;
-	vertical-align: middle;
-	padding: 3px;
-	margin: 3px;
-	min-width: 80px;
-	overflow: visible;
-}
-
-.metrics .content span {
-	display: inline-block;
-}
-
-.metrics .editing {
-	position: relative;
-	z-index: 100;
-	cursor: text;
-}
-
-.metrics .left,
-.metrics .right {
-	display: inline-block;
-	vertical-align: middle;
-	margin: 0 10px;
-}
-
-.metrics .top {
-	display: inline-block;
-}
-
-.metrics .bottom {
-	display: inline-block;
-}
\ No newline at end of file
diff --git a/lessons/L5/concepts/07-the-box-model/css/div.css b/lessons/L5/concepts/07-the-box-model/css/div.css
deleted file mode 100644
index a63bc8b04..000000000
--- a/lessons/L5/concepts/07-the-box-model/css/div.css
+++ /dev/null
@@ -1,12 +0,0 @@
-* {
-  box-sizing: border-box;
-}
-body {
-  margin: 0;
-  padding: 0;
-}
-div {
-  padding: 20px;
-  margin: 20px;
-  border: 20px solid #000;
-}
diff --git a/lessons/L5/concepts/07-the-box-model/div.html b/lessons/L5/concepts/07-the-box-model/div.html
deleted file mode 100644
index ac5f27d28..000000000
--- a/lessons/L5/concepts/07-the-box-model/div.html
+++ /dev/null
@@ -1,11 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Simple Div</title>
-	<link href="css/div.css" rel="stylesheet">
-</head>
-<body>
-	<div>This element is a div.</div>
-</body>
-</html>
diff --git a/lessons/L5/concepts/07-the-box-model/example.jpg b/lessons/L5/concepts/07-the-box-model/example.jpg
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diff --git a/lessons/L5/concepts/07-the-box-model/notes.md b/lessons/L5/concepts/07-the-box-model/notes.md
deleted file mode 100644
index 196064755..000000000
--- a/lessons/L5/concepts/07-the-box-model/notes.md
+++ /dev/null
@@ -1,4 +0,0 @@
-### Related Links
-
-- [Introduction to the CSS Box Model](https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Box_Model/Introduction_to_the_CSS_box_model)
-- [International Box-Sizing Awareness Day](https://css-tricks.com/international-box-sizing-awareness-day/)
\ No newline at end of file
diff --git a/lessons/L5/concepts/08-border-box/border-box-option-1.png b/lessons/L5/concepts/08-border-box/border-box-option-1.png
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diff --git a/lessons/L5/concepts/08-border-box/border-box-option-2.png b/lessons/L5/concepts/08-border-box/border-box-option-2.png
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diff --git a/lessons/L5/concepts/08-border-box/image-form.jpeg b/lessons/L5/concepts/08-border-box/image-form.jpeg
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diff --git a/lessons/L5/concepts/08-border-box/instructions.md b/lessons/L5/concepts/08-border-box/instructions.md
deleted file mode 100644
index 90fdf5173..000000000
--- a/lessons/L5/concepts/08-border-box/instructions.md
+++ /dev/null
@@ -1,6 +0,0 @@
-## Instructions
-
-### Pick the element with a height of 300px.
-
-![option 1](http://udacity.github.io/fend/lessons/L5/concepts/08-border-box/border-box-option-1.png)
-![option 2](http://udacity.github.io/fend/lessons/L5/concepts/08-border-box/border-box-option-2.png)
\ No newline at end of file
diff --git a/lessons/L5/concepts/09-changing-boxes/changing-boxes-1.html b/lessons/L5/concepts/09-changing-boxes/changing-boxes-1.html
deleted file mode 100644
index 5c87f908c..000000000
--- a/lessons/L5/concepts/09-changing-boxes/changing-boxes-1.html
+++ /dev/null
@@ -1,56 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Changing Boxes</title>
-	<link href="css/background-colors.css" rel="stylesheet">	
-	<link href="css/changing-boxes-1.css" rel="stylesheet">
-</head>
-<body>
-	<h1>Planning for Next Harvest</h1>
-	<h2>Spring Crops by the Numbers</h2>
-	<figure>
-		<table>
-			<figcaption>Spring crops with their associated costs and revenue per bag.</figcaption>
-			<thead>
-				<tr>
-					<td>Crop</td>
-					<td>Cost per bag</td>
-					<td>Selling price per crop</td>
-					<td>Revnue per bag</td>
-				</tr>
-			</thead>
-			<tbody>
-				<tr>
-					<td>Turnips</td>
-					<td>120G</td>
-					<td>60G</td>
-					<td>360G</td>
-				</tr>
-				<tr>
-					<td>Potatoes</td>
-					<td>150G</td>
-					<td>80G</td>
-					<td>490G</td>
-				</tr>
-				<tr>
-					<td>Cabbages</td>
-					<td>500G</td>
-					<td>250G</td>
-					<td>1500G</td>
-				</tr>
-			</tbody>
-			<tfoot>
-				<tr>
-					<td></td>
-					<td></td>
-					<td></td>
-				</tr>
-			</tfoot>	
-		</table>
-	</figure>
-	<div>
-		<p>Good luck on planning your harvests this Spring! Here's a quote to keep you inspired! <q>Nobody finds what they want immediately. But if you waste your time everyday because of that, you'll never find anything.</q> </p>
-	</div>
-</body>
-</html>
\ No newline at end of file
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diff --git a/lessons/L5/concepts/09-changing-boxes/changing-boxes-2.html b/lessons/L5/concepts/09-changing-boxes/changing-boxes-2.html
deleted file mode 100644
index a58e62217..000000000
--- a/lessons/L5/concepts/09-changing-boxes/changing-boxes-2.html
+++ /dev/null
@@ -1,19 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Changing Boxes</title>
-	<link href="css/background-colors.css" rel="stylesheet">	
-	<link href="css/changing-boxes-2.css" rel="stylesheet">
-	<style>
-		body {
-			margin: 0;
-		}
-	</style>
-</head>
-<body>
-	<div>
-		Good luck on planning your harvests this Spring! Here's a quote to keep you inspired! Nobody finds what they want immediately. But if you waste your time everyday because of that, you'll never find anything.
-	</div>
-</body>
-</html>
\ No newline at end of file
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diff --git a/lessons/L5/concepts/09-changing-boxes/changing-boxes-3.html b/lessons/L5/concepts/09-changing-boxes/changing-boxes-3.html
deleted file mode 100644
index 8e5616c36..000000000
--- a/lessons/L5/concepts/09-changing-boxes/changing-boxes-3.html
+++ /dev/null
@@ -1,19 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Changing Boxes</title>
-	<link href="css/background-colors.css" rel="stylesheet">	
-	<link href="css/changing-boxes-3.css" rel="stylesheet">
-	<style>
-		body {
-			margin: 0;
-		}
-	</style>
-</head>
-<body>
-	<div>
-		Good luck on planning your harvests this Spring! Here's a quote to keep you inspired! Nobody finds what they want immediately. But if you waste your time everyday because of that, you'll never find anything.
-	</div>
-</body>
-</html>
\ No newline at end of file
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diff --git a/lessons/L5/concepts/09-changing-boxes/changing-boxes-4.html b/lessons/L5/concepts/09-changing-boxes/changing-boxes-4.html
deleted file mode 100644
index c641ac438..000000000
--- a/lessons/L5/concepts/09-changing-boxes/changing-boxes-4.html
+++ /dev/null
@@ -1,18 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Changing Boxes</title>
-	<link href="css/background-colors.css" rel="stylesheet">	
-	<link href="css/changing-boxes-4.css" rel="stylesheet">
-	<style>
-		body {
-			margin: 0;
-		}
-	</style>
-</head>
-<body>
-	<div>
-	</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L5/concepts/09-changing-boxes/changing-boxes-4.png b/lessons/L5/concepts/09-changing-boxes/changing-boxes-4.png
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diff --git a/lessons/L5/concepts/09-changing-boxes/changing-boxes-5.html b/lessons/L5/concepts/09-changing-boxes/changing-boxes-5.html
deleted file mode 100644
index 2dc211fe9..000000000
--- a/lessons/L5/concepts/09-changing-boxes/changing-boxes-5.html
+++ /dev/null
@@ -1,19 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Changing Boxes</title>
-	<link href="css/background-colors.css" rel="stylesheet">	
-	<link href="css/changing-boxes-5.css" rel="stylesheet">
-	<style>
-		body {
-			margin: 0;
-		}
-	</style>
-</head>
-<body>
-	<div>
-		Good luck on planning your harvests this Spring! Here's a quote to keep you inspired! Nobody finds what they want immediately. But if you waste your time everyday because of that, you'll never find anything.
-	</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L5/concepts/09-changing-boxes/changing-boxes-5.png b/lessons/L5/concepts/09-changing-boxes/changing-boxes-5.png
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diff --git a/lessons/L5/concepts/09-changing-boxes/changing-boxes-6.html b/lessons/L5/concepts/09-changing-boxes/changing-boxes-6.html
deleted file mode 100644
index 09e2e7ecd..000000000
--- a/lessons/L5/concepts/09-changing-boxes/changing-boxes-6.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Changing Boxes</title>
-	<link href="css/changing-boxes-6.css" rel="stylesheet">
-	<style>
-		body {
-			margin: 0;
-		}
-	</style>
-</head>
-<body>
-	<div class="one">
-		The widths of block elements are <strong>constraint-based</strong>.
-	</div>
-	<div class="two">
-		The heights of block elements are <strong>content-based</strong> which means they take up as little height as possible.
-	</div>
-	<div class="three">
-	</div>
-	<div class="four">
-		Block elements are as <strong>wide</strong> as possible and as <strong>short</strong> as possible.
-	</div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L5/concepts/09-changing-boxes/css/background-colors.css b/lessons/L5/concepts/09-changing-boxes/css/background-colors.css
deleted file mode 100644
index fa657fb8a..000000000
--- a/lessons/L5/concepts/09-changing-boxes/css/background-colors.css
+++ /dev/null
@@ -1,24 +0,0 @@
-* {
-	box-sizing: border-box;
-}
-h1 {
-	background-color: #ffc;
-}
-h2 {
-	background-color: #fcf;
-}
-figure {
-	background-color: #ccc;
-}
-figcaption {
-	background-color: #cfc;
-}
-table {
-	background-color: #ccf;
-}
-div {
-	background-color: #fcc;
-}
-q {
-	background-color: #cff;
-}
\ No newline at end of file
diff --git a/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-1.css b/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-1.css
deleted file mode 100644
index e69de29bb..000000000
diff --git a/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-2.css b/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-2.css
deleted file mode 100644
index e69de29bb..000000000
diff --git a/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-3.css b/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-3.css
deleted file mode 100644
index 51c7597bd..000000000
--- a/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-3.css
+++ /dev/null
@@ -1,7 +0,0 @@
-div {
-	margin :20px;
-	padding: 20px;
-	border: 20px solid #000;
-	height: 300px;
-	width: 400px;
-}
\ No newline at end of file
diff --git a/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-4.css b/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-4.css
deleted file mode 100644
index e69de29bb..000000000
diff --git a/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-5.css b/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-5.css
deleted file mode 100644
index 67efa2c0b..000000000
--- a/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-5.css
+++ /dev/null
@@ -1,4 +0,0 @@
-div {
-	height: 200px;
-	width: 300px;
-}
\ No newline at end of file
diff --git a/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-6.css b/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-6.css
deleted file mode 100644
index 0ed8a974b..000000000
--- a/lessons/L5/concepts/09-changing-boxes/css/changing-boxes-6.css
+++ /dev/null
@@ -1,5 +0,0 @@
-.four {
-	margin: 20px;
-	border: 20px;
-	padding: 20px;
-}
\ No newline at end of file
diff --git a/lessons/L5/concepts/09-changing-boxes/notes.md b/lessons/L5/concepts/09-changing-boxes/notes.md
deleted file mode 100644
index 58a9e035d..000000000
--- a/lessons/L5/concepts/09-changing-boxes/notes.md
+++ /dev/null
@@ -1,3 +0,0 @@
-### Background-color
-
-By default, the `background-color` for elements is transparent - they inherit the color of their parent. Because `<body>` is the parent of these elements and the `<body>` itself defaults to white, this means that any elements inside the `<body>` will also appear white without any styles applied.
\ No newline at end of file
diff --git a/lessons/L5/concepts/10-box-model-sizing/box-model-sizing.png b/lessons/L5/concepts/10-box-model-sizing/box-model-sizing.png
deleted file mode 100644
index 3e04c1b60..000000000
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diff --git a/lessons/L5/concepts/10-box-model-sizing/box-model-sizing.py b/lessons/L5/concepts/10-box-model-sizing/box-model-sizing.py
deleted file mode 100644
index b1d0980ca..000000000
--- a/lessons/L5/concepts/10-box-model-sizing/box-model-sizing.py
+++ /dev/null
@@ -1,95 +0,0 @@
-import re
-
-answer = widget_inputs["text1"].strip()
-height_value = ""
-padding_value = ""
-margin_value = ""
-
-height_solution = ["175px"]
-padding_solution = ["50px", "50px 50px", "50px 50px 50px", "50px 50px 50px 50px"]
-margin_solution = ["20px", "20px 20px", "20px 20px 20px", "20px 20px 20px 20px"]
-
-solution_dictionary = {}
-solution_dictionary["height"] = height_solution
-solution_dictionary["padding"] = padding_solution
-solution_dictionary["margin"] = margin_solution
-
-comments = []
-congrats = "Good job! View the answer to learn about the shorthand ways to write `padding` and `margin`."
-def commentizer(new):
-	if new not in comments:
-		comments.append(new)
-
-is_correct = True
-
-def run_through_problems():
-	# check if student answered the problem
-	if not answer:
-		commentizer("You didn't provide an answer. Don't give up, you can do it!")
-		return False
-
-	# check if answer has three lines
-	if not re.match("(.*\\n){2}", answer):
-		commentizer("Your answer should only be three lines long. Try adding or removing lines from your answer.")
-		return False
-
-	# split answer into three lines so each line can be checked
-	lines = answer.split('\n', 3)
-
-	# check formatting
-	has_formatting_issue = False
-
-	for line in lines:
-		if not re.match("[a-z\\-]{3,}\\s*:\\s*.*;", line):
-			commentizer("Check `" + line + "`. Is it formatted correctly? A CSS declaration should always read `propertyName: value;`.")
-			has_formatting_issue = True
-		elif not re.match("(height|width|padding|border|margin)\\s*:\\s*.*;", line):
-			commentizer("Check `" + line + "`. What property are you using? You only need to use properties related to the box model.")
-			has_formatting_issue = True
-		elif not re.match("(height|padding|margin)\\s*:\\s*.*;", line):
-			commentizer("Check `" + line + "`. What property are you using? You only need to use `height`, `padding`, and `margin` to complete the exercise.")
-			has_formatting_issue = True
-		elif re.match("height\\s*:\\s*.*;", line):
-			if not re.match("height\\s*:\\s*\\d*px;", line):
-				commentizer("Check `" + line + "`. Your value is not formatted correctly? The value should be a number followed by a unit \(e.g. `25px`\).")
-				has_formatting_issue = True
-		elif re.match("(padding|margin)\\s*:\\s*.*;", line):
-			if not (re.match("(padding|margin)\\s*:\\s*(\\d*px|\\d*px\\s\\d*px|\\d*px\\s\\d*px\\s\\d*px|\\d*px\\s\\d*px\\s\\d*px\\s\\d*px);", line)):
-				commentizer("Check `" + line + "`. Your value is not formatted correctly? The value should be a number or numbers each followed by a unit \(e.g. `25px` or `25px 25px`\).")
-				has_formatting_issue = True
-		else:
-			continue
-
-	if has_formatting_issue:
-		return False
-
-	# check values
-	for line in lines:
-		if re.match("height", line):
-			height_value = re.match("height\\s*:\\s*(.*);", line).group(1)
-		elif re.match("padding", line):
-			padding_value = re.match("padding\\s*:\\s*(.*);", line).group(1)
-		elif re.match("margin", line):
-			margin_value = re.match("margin\\s*:\\s*(.*);", line).group(1)
-
-	if height_value not in solution_dictionary["height"]:
-		commentizer("Check your answer for `height`. When using `border-box;`, height is calculated as height + padding + border.")
-		return False
-
-	if padding_value not in solution_dictionary["padding"]:
-		commentizer("Check your answer for `padding`. The padding is a perfect square. Use the values next to the ruler.")
-		return False
-
-	if margin_value not in solution_dictionary["margin"]:
-		commentizer("Check your answer for `margin`. The margin is a perfect square. Use the values next to the ruler.")
-		return False
-
-	return True
-
-is_correct = run_through_problems()
-
-if is_correct:
-	commentizer(congrats)
-
-grade_result["comment"] = "\n\n".join(comments)
-grade_result["correct"] = is_correct
\ No newline at end of file
diff --git a/lessons/L5/concepts/10-box-model-sizing/box-sizing.html b/lessons/L5/concepts/10-box-model-sizing/box-sizing.html
deleted file mode 100644
index 86d06e1ba..000000000
--- a/lessons/L5/concepts/10-box-model-sizing/box-sizing.html
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Box Sizing</title>
-	<style>
-		.content {
-			box-sizing: content-box;
-			width: 200px;
-			height: 200px;
-			border: 10px solid blue;
-			padding: 10px;
-			background-color: #ccf;
-		}
-		.box {
-			box-sizing: border-box;
-			width: 200px;
-			height: 200px;			
-			border: 10px solid green;
-			padding: 10px;
-			background-color: #cfc;
-		}
-	</style>
-</head>
-<body>
-	<div class="content"></div>
-	<div class="box"></div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L5/concepts/10-box-model-sizing/image-form.jpeg b/lessons/L5/concepts/10-box-model-sizing/image-form.jpeg
deleted file mode 100644
index aa4e71c34..000000000
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diff --git a/lessons/L5/concepts/10-box-model-sizing/instructions.md b/lessons/L5/concepts/10-box-model-sizing/instructions.md
deleted file mode 100644
index f3aa7f315..000000000
--- a/lessons/L5/concepts/10-box-model-sizing/instructions.md
+++ /dev/null
@@ -1,18 +0,0 @@
-## Instructions
-
-### Finish the CSS to create this block element's box model.
-
-![box model](http://udacity.github.io/fend/lessons/L5/concepts/10-box-model-sizing/box-model-sizing.png)
-
-```css
-.box-model {
-  width: 175px;
-  /* add CSS here */
-}
-```
-
-### Need some help?
-
-* More about the `padding` [property on MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/padding).
-* More about the `margin` [property on MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/margin).
-* More about the `height` [property on MDN](https://developer.mozilla.org/en-US/docs/Web/CSS/height).
\ No newline at end of file
diff --git a/lessons/L5/concepts/11-containers/css/styles.css b/lessons/L5/concepts/11-containers/css/styles.css
deleted file mode 100644
index ae760b2ad..000000000
--- a/lessons/L5/concepts/11-containers/css/styles.css
+++ /dev/null
@@ -1,21 +0,0 @@
-* {
-	box-sizing: border-box;
-}
-
-body {
-	margin: 0;
-	padding: 0;
-	font-size: 18px;
-}
-
-p {
-	margin: 0;
-}
-
-.container {
-	background-color: #ccf;
-}
-
-.child {
-	background-color: #fcc;
-}
\ No newline at end of file
diff --git a/lessons/L5/concepts/11-containers/index.html b/lessons/L5/concepts/11-containers/index.html
deleted file mode 100644
index 5037afca1..000000000
--- a/lessons/L5/concepts/11-containers/index.html
+++ /dev/null
@@ -1,15 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="utf-8">
-    <meta http-equiv="X-UA-Compatible" content="IE=edge">
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    <title>Relative Widths</title>
-    <link href="css/styles.css" rel="stylesheet">
-</head>
-<body>
-    <div class="container">
-        <div class="child">Typewriter pug craft beer, authentic occupy raw denim cliche irony YOLO PBR&amp;B bicycle rights plaid gochujang. Echo park four loko meggings PBR&amp;B, williamsburg fap leggings asymmetrical. XOXO banh mi affogato, chartreuse truffaut next level irony vegan hashtag forage meh man braid.</div>
-    </div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L5/concepts/12-relative-widths/css/images/doc-icon.png b/lessons/L5/concepts/12-relative-widths/css/images/doc-icon.png
deleted file mode 100644
index acfd18711..000000000
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diff --git a/lessons/L5/concepts/12-relative-widths/css/images/social-facebook-white.png b/lessons/L5/concepts/12-relative-widths/css/images/social-facebook-white.png
deleted file mode 100644
index 502c241ef..000000000
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index 28464d032..000000000
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diff --git a/lessons/L5/concepts/12-relative-widths/css/images/social-google-white.png b/lessons/L5/concepts/12-relative-widths/css/images/social-google-white.png
deleted file mode 100644
index 1e0934131..000000000
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index 01c57962f..000000000
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diff --git a/lessons/L5/concepts/12-relative-widths/css/images/social-linkedin-white.png b/lessons/L5/concepts/12-relative-widths/css/images/social-linkedin-white.png
deleted file mode 100644
index e6b139ed0..000000000
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index 199238d50..000000000
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diff --git a/lessons/L5/concepts/12-relative-widths/css/images/social-twitter-white.png b/lessons/L5/concepts/12-relative-widths/css/images/social-twitter-white.png
deleted file mode 100644
index bbfb0b163..000000000
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diff --git a/lessons/L5/concepts/12-relative-widths/css/images/social-twitter.png b/lessons/L5/concepts/12-relative-widths/css/images/social-twitter.png
deleted file mode 100644
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diff --git a/lessons/L5/concepts/12-relative-widths/css/jetpack.css b/lessons/L5/concepts/12-relative-widths/css/jetpack.css
deleted file mode 100644
index de1ee8be8..000000000
--- a/lessons/L5/concepts/12-relative-widths/css/jetpack.css
+++ /dev/null
@@ -1,4 +0,0 @@
-/*!
-* Do not modify this file directly.  It is concatenated from individual module CSS files.
-*/
-.jp-carousel-wrap *{line-height:inherit}.jp-carousel-overlay{background:#000}div.jp-carousel-fadeaway{background:-webkit-gradient(linear,left bottom,left top,from(rgba(0,0,0,.5)),to(rgba(0,0,0,0)));position:fixed;bottom:0;z-index:2147483647;width:100%;height:15px}.jp-carousel-next-button span,.jp-carousel-previous-button span{background:url(../modules/carousel/images/arrows.png) center center/200px 126px no-repeat}.jp-carousel-msg{font-family:"Open Sans",sans-serif;font-style:normal;display:inline-block;line-height:19px;padding:11px 15px;font-size:14px;text-align:center;margin:25px 20px 0 2px;background-color:#fff;border-left:4px solid #ffba00;box-shadow:0 1px 1px 0 rgba(0,0,0,.1)}@media only screen and (-webkit-min-device-pixel-ratio:1.5),only screen and (-o-min-device-pixel-ratio:3/2),only screen and (min--moz-device-pixel-ratio:1.5),only screen and (min-device-pixel-ratio:1.5){.jp-carousel-next-button span,.jp-carousel-previous-button span{background-image:url(../modules/carousel/images/arrows-2x.png)}}.jp-carousel-wrap{font-family:"Helvetica Neue",sans-serif!important}.jp-carousel-info{position:absolute;bottom:0;text-align:left!important;-webkit-font-smoothing:subpixel-antialiased!important}.jp-carousel-info ::selection{background:#68c9e8;color:#fff}.jp-carousel-info ::-moz-selection{background:#68c9e8;color:#fff}.jp-carousel-photo-info{position:relative;left:25%;width:50%}.jp-carousel-transitions .jp-carousel-photo-info{-webkit-transition:400ms ease-out;transition:400ms ease-out}.jp-carousel-info h2{background:none!important;border:none!important;color:#999;display:block!important;font:400 13px/1.25em "Helvetica Neue",sans-serif!important;letter-spacing:0!important;margin:7px 0 0!important;padding:10px 0 0!important;overflow:hidden;text-align:left;text-shadow:none!important;text-transform:none!important;-webkit-font-smoothing:subpixel-antialiased}.jp-carousel-next-button,.jp-carousel-previous-button{text-indent:-9999px;overflow:hidden;cursor:pointer}.jp-carousel-next-button span,.jp-carousel-previous-button span{position:absolute;top:0;bottom:0;width:82px;zoom:1;filter:alpha(opacity=20);opacity:.2}.jp-carousel-transitions .jp-carousel-next-button span,.jp-carousel-transitions .jp-carousel-previous-button span{-webkit-transition:500ms opacity ease-out;transition:500ms opacity ease-out}.jp-carousel-next-button:hover span,.jp-carousel-previous-button:hover span{filter:alpha(opacity=60);opacity:.6}.jp-carousel-next-button span{background-position:-110px center;right:0}.jp-carousel-previous-button span{background-position:-10px center;left:0}.jp-carousel-buttons{margin:-18px -20px 15px;padding:8px 10px;border-bottom:1px solid #222;background:#222;text-align:center}div.jp-carousel-buttons a{border:none!important;color:#999;font:400 11px/1.2em "Helvetica Neue",sans-serif!important;letter-spacing:0!important;padding:5px 2px 5px 0;text-decoration:none!important;text-shadow:none!important;vertical-align:middle;-webkit-font-smoothing:subpixel-antialiased}div.jp-carousel-buttons a:hover{color:#68c9e8;border:none!important}.jp-carousel-transitions div.jp-carousel-buttons a:hover{-webkit-transition:none!important;transition:none!important}.jp-carousel-next-button,.jp-carousel-previous-button,.jp-carousel-slide,.jp-carousel-slide img{-webkit-transform:translate3d(0,0,0);-moz-transform:translate3d(0,0,0);-o-transform:translate3d(0,0,0);-ms-transform:translate3d(0,0,0)}.jp-carousel-slide{position:fixed;width:0;bottom:0;background-color:#000;border-radius:2px;-webkit-border-radius:2px;-moz-border-radius:2px;-ms-border-radius:2px;-o-border-radius:2px}.jp-carousel-slide.selected{position:absolute!important;filter:alpha(opacity=100);opacity:1}.jp-carousel-slide{filter:alpha(opacity=25);opacity:.25}.jp-carousel-slide img{display:block;width:100%!important;height:100%!important;max-width:100%!important;max-height:100%!important;background:none!important;border:none!important;padding:0!important;box-shadow:0 2px 8px rgba(0,0,0,.1);zoom:1}.jp-carousel-transitions .jp-carousel-slide{-webkit-transition:opacity 400ms linear;transition:opacity 400ms linear}.jp-carousel-close-hint{color:#999;cursor:default;letter-spacing:0!important;padding:.35em 0 0;position:absolute;text-align:left;width:90%}.jp-carousel-transitions .jp-carousel-close-hint{-webkit-transition:color 200ms linear;transition:color 200ms linear}.jp-carousel-close-hint span{cursor:pointer;background-color:#000;background-color:rgba(0,0,0,.8);display:block;height:22px;font:400 24px/1 "Helvetica Neue",sans-serif!important;line-height:22px;margin:0 0 0 .4em;text-align:center;vertical-align:middle;width:22px;border-radius:4px}.jp-carousel-transitions .jp-carousel-close-hint span{-webkit-transition:border-color 200ms linear;transition:border-color 200ms linear}.jp-carousel-close-hint:hover{cursor:default;color:#fff}.jp-carousel-close-hint:hover span{border-color:#fff}a.jp-carousel-image-download,div.jp-carousel-buttons a.jp-carousel-commentlink,div.jp-carousel-buttons a.jp-carousel-like,div.jp-carousel-buttons a.jp-carousel-reblog{background:url(../modules/carousel/images/carousel-sprite.png?5) 0 0/16px 200px no-repeat}div.jp-carousel-buttons a.jp-carousel-commentlink,div.jp-carousel-buttons a.jp-carousel-reblog{margin:0 14px 0 0!important}div.jp-carousel-buttons a.jp-carousel-like.liked,div.jp-carousel-buttons a.jp-carousel-reblog.reblogged{background-color:#303030;padding-right:8px!important;border-radius:2px;-webkit-border-radius:2px;-moz-border-radius:2px;-ms-border-radius:2px;-o-border-radius:2px}div.jp-carousel-buttons a.jp-carousel-reblog.reblogged{margin:0 2px 0 -12px!important}div.jp-carousel-buttons a.jp-carousel-reblog,div.jp-carousel-buttons a.jp-carousel-reblog.reblogged:hover{background-position:6px -36px;padding-right:auto!important;padding-left:26px!important;color:#999}div.jp-carousel-buttons a.jp-carousel-commentlink{background-position:0 -156px;padding-left:19px!important}div.jp-carousel-buttons a.jp-carousel-reblog.reblogged:hover{cursor:default}div.jp-carousel-buttons a.jp-carousel-reblog:hover{background-position:6px -56px;color:#68c9e8}div.jp-carousel-buttons a.jp-carousel-like{background-position:5px 5px;padding-left:24px!important}div.jp-carousel-buttons a.jp-carousel-like:hover{background-position:5px -15px}@media only screen and (-webkit-min-device-pixel-ratio:1.5),only screen and (-o-min-device-pixel-ratio:3/2),only screen and (min--moz-device-pixel-ratio:1.5),only screen and (min-device-pixel-ratio:1.5){a.jp-carousel-image-download,div.jp-carousel-buttons a.jp-carousel-commentlink,div.jp-carousel-buttons a.jp-carousel-like,div.jp-carousel-buttons a.jp-carousel-reblog{background-image:url(../modules/carousel/images/carousel-sprite-2x.png?5)}}div#carousel-reblog-box{background:#222;background:-webkit-gradient(linear,left bottom,left top,from(#222),to(#333));padding:3px 0 0;display:none;margin:5px auto 0;border-radius:2px;box-shadow:0 0 20px rgba(0,0,0,.9);height:74px;width:565px}#carousel-reblog-box textarea{background:#999;font:13px/1.4 "Helvetica Neue",sans-serif!important;color:#444;padding:3px 6px;width:370px;height:48px;float:left;margin:6px 9px 0;border:1px solid #666;box-shadow:inset 2px 2px 2px rgba(0,0,0,.2);border-radius:2px}#carousel-reblog-box textarea:focus{background:#ccc;color:#222}#carousel-reblog-box label{color:#aaa;font-size:11px;padding-right:2px;padding-left:2px;display:inline;font-weight:400}#carousel-reblog-box select{width:110px;padding:0;font-size:12px;font-family:"Helvetica Neue",sans-serif!important;background:#333;color:#eee;border:1px solid #444;margin-top:5px}#carousel-reblog-box .submit,#wrapper #carousel-reblog-box p.response{float:left;width:154px;padding-top:0;padding-left:1px;overflow:hidden;height:34px;margin:3px 0 0 2px!important}#wrapper #carousel-reblog-box p.response{font-size:13px;clear:none;padding-left:2px;height:34px;color:#aaa}#carousel-reblog-box input#carousel-reblog-submit,#jp-carousel-comment-form-button-submit{font:13px/24px "Helvetica Neue",sans-serif!important;margin-top:8px;padding:0 10px!important;border-radius:1em;height:24px;color:#333;cursor:pointer;font-weight:400;background:#aaa;background:-webkit-gradient(linear,left bottom,left top,from(#aaa),to(#ccc));border:1px solid #444}#carousel-reblog-box input#carousel-reblog-submit:hover,#jp-carousel-comment-form-button-submit:hover{background:#ccc;background:-webkit-gradient(linear,left bottom,left top,from(#ccc),to(#eee))}#carousel-reblog-box .canceltext{color:#aaa;font-size:11px;line-height:24px}#carousel-reblog-box .canceltext a{color:#fff}.jp-carousel-titleanddesc{border-top:1px solid #222;color:#999;font-size:15px;padding-top:24px;margin-bottom:20px;font-weight:400}.jp-carousel-titleanddesc-title{font:300 1.5em/1.1 "Helvetica Neue",sans-serif!important;text-transform:none!important;color:#fff;margin:0 0 15px;padding:0}.jp-carousel-titleanddesc-desc p{color:#999;line-height:1.4;margin-bottom:.75em}.jp-carousel-comments p a,.jp-carousel-info h2 a,.jp-carousel-titleanddesc p a{color:#fff!important;border:none!important;text-decoration:underline!important;font-weight:400!important;font-style:normal!important}.jp-carousel-titleanddesc p b,.jp-carousel-titleanddesc p strong{font-weight:700;color:#999}.jp-carousel-titleanddesc p em,.jp-carousel-titleanddesc p i{font-style:italic;color:#999}.jp-carousel-comments p a:hover,.jp-carousel-info h2 a:hover,.jp-carousel-titleanddesc p a:hover{color:#68c9e8!important}.jp-carousel-titleanddesc p:empty{display:none}.jp-carousel-left-column-wrapper h1:after,.jp-carousel-left-column-wrapper h1:before,.jp-carousel-photo-info h1:after,.jp-carousel-photo-info h1:before{content:none!important}.jp-carousel-image-meta{background:#111;border:1px solid #222;color:#fff;font:12px/1.4 "Helvetica Neue",sans-serif!important;overflow:hidden;padding:18px 20px;width:209px!important}.jp-carousel-image-meta h5,.jp-carousel-image-meta li{font-family:"Helvetica Neue",sans-serif!important;position:inherit!important;top:auto!important;right:auto!important;left:auto!important;bottom:auto!important;background:none!important;border:none!important;font-weight:400!important;line-height:1.3em!important}.jp-carousel-image-meta ul{margin:0!important;padding:0!important;list-style:none!important}.jp-carousel-image-meta li{width:48%!important;float:left!important;margin:0 2% 15px 0!important;color:#fff!important;font-size:13px!important}.jp-carousel-image-meta h5{color:#999!important;text-transform:uppercase!important;font-size:10px!important;margin:0 0 2px!important;letter-spacing:.1em!important}a.jp-carousel-image-download{padding-left:23px;display:inline-block;clear:both;color:#999;line-height:1;font-weight:400;font-size:13px;text-decoration:none;background-position:0 -82px}a.jp-carousel-image-download span.photo-size{font-size:11px;border-radius:1em;margin-left:2px;display:inline-block}a.jp-carousel-image-download span.photo-size-times{padding:0 1px 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\ No newline at end of file
diff --git a/lessons/L5/concepts/12-relative-widths/css/udacity.css b/lessons/L5/concepts/12-relative-widths/css/udacity.css
deleted file mode 100644
index 458159819..000000000
--- a/lessons/L5/concepts/12-relative-widths/css/udacity.css
+++ /dev/null
@@ -1,1732 +0,0 @@
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-									</ul>
-								</li>
-							</ul>
-						</nav>
-					</div>
-				</div>
-				<div class="row site-info-row">
-					<div class="col-sm-6">
-						<div class="site-info">
-							Nanodegree is a trademark of Udacity.
-							<br>
-							© 2011-2016 Udacity, Inc.
-						</div><!-- .site-info -->
-					</div>
-					<div class="col-sm-6">
-						<nav class="social">
-							<ul class="social_links">
-								<li><a href="#"><img src="images/twitter.min.svg" alt="Twitter" scale="0"></a></li>
-								<li><a href="#"><img src="images/facebook.min.svg" alt="Facebook" scale="0"></a></li>
-								<li><a href="#"><img src="images/g_plus.min.svg" alt="Google +" scale="0"></a></li>
-								<li><a href="#"><img src="images/linkedin.min.svg" alt="LinkedIn" scale="0"></a></li>
-							</ul>
-						</nav>
-					</div>
-				</div>
-			</div>
-		</footer><!-- #colophon -->
-	</div><!-- #page -->
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L5/concepts/12-relative-widths/instructions.md b/lessons/L5/concepts/12-relative-widths/instructions.md
deleted file mode 100644
index 8b8fe2ef2..000000000
--- a/lessons/L5/concepts/12-relative-widths/instructions.md
+++ /dev/null
@@ -1,23 +0,0 @@
-## Instructions
-
-### Given the following HTML and CSS, how wide will the primary and secondary elements be when they get rendered to the page?
-
-```html
-<div class="container">
-  ...
-  <div id="primary">...</div>
-  <div id="secondary">...</div>
-</div>
-```
-
-```css
-.container {
-  width: 1170px;
-}
-#primary {
-  width: 66.66666667%;
-}
-#secondary {
-  width: 33.33333333%;
-}
-```
\ No newline at end of file
diff --git a/lessons/L5/concepts/12-relative-widths/relative-widths.py b/lessons/L5/concepts/12-relative-widths/relative-widths.py
deleted file mode 100644
index 0fda2f943..000000000
--- a/lessons/L5/concepts/12-relative-widths/relative-widths.py
+++ /dev/null
@@ -1,45 +0,0 @@
-import re
-
-primary = widget_inputs["text1"].strip()
-secondary = widget_inputs["text2"].strip()
-
-comments = []
-congrats = ""
-def commentizer(new):
-	if new not in comments:
-		comments.append(new)
-
-is_correct = False
-
-def run_through_problems():
-	# check if student has submitted answer for each textbox
-	if not (primary and secondary):
-		commentizer("You forgot to fill out one of the text boxes.")
-		return False
-
-	# check if answers have correct units
-	if (re.match("^780$", primary) or re.match("^390$", secondary)):
-		commentizer("That's close, but one of your answers is missing units. Include `px` to the end of both answers and you've got it.")
-		return False
-
-	# check if answers have correct value
-	if not re.match("780px", primary):
-		commentizer("Check your math. The primary element is 2/3 of the container.")
-		return False
-
-	if not re.match("390px", secondary):
-		commentizer("Check your math. The secondary element is 1/3 of the container.")
-		return False
-	return False
-
-if (re.match("780px", primary) and re.match("390px", secondary)):
-	congrats = "Nailed it! Understanding relative widths will help you as you learn more about responsive layouts."
-	is_correct = True
-else:
-	run_through_problems()
-
-if is_correct:
-	commentizer(congrats)
-
-grade_result["comment"] = "\n\n".join(comments)
-grade_result["correct"] = is_correct
\ No newline at end of file
diff --git a/lessons/L5/concepts/13-inline-boxes/block-vs-inline-1.html b/lessons/L5/concepts/13-inline-boxes/block-vs-inline-1.html
deleted file mode 100644
index f201fd817..000000000
--- a/lessons/L5/concepts/13-inline-boxes/block-vs-inline-1.html
+++ /dev/null
@@ -1,19 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Block vs. Inline</title>
-	<style>
-		body {
-			font-size: 20px;
-		}
-		p, span {
-			border: 1px solid #000;
-		}
-	</style>
-</head>
-<body>
-	<p>This is a block element.</p>
-	<span>This is an inline element.</span>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L5/concepts/13-inline-boxes/block-vs-inline-2.html b/lessons/L5/concepts/13-inline-boxes/block-vs-inline-2.html
deleted file mode 100644
index c559babb8..000000000
--- a/lessons/L5/concepts/13-inline-boxes/block-vs-inline-2.html
+++ /dev/null
@@ -1,23 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Block vs. Inline</title>
-	<style>
-		body {
-			font-size: 20px;
-		}
-		p, span {
-			border: 1px solid #000;
-		}
-		div {
-			margin-top: 1em;
-		}
-	</style>
-</head>
-<body>
-	<p>This is a block element.</p>
-	<span>This is an inline element.</span>
-	<div><span>But what happens when the content is wider than the space available?</span></div>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L5/concepts/13-inline-boxes/block-vs-inline-3.html b/lessons/L5/concepts/13-inline-boxes/block-vs-inline-3.html
deleted file mode 100644
index 7210a04ba..000000000
--- a/lessons/L5/concepts/13-inline-boxes/block-vs-inline-3.html
+++ /dev/null
@@ -1,19 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Block vs. Inline</title>
-	<style>
-		p, span {
-			border: 1px solid #000;
-		}
-		span {
-			margin: 1em;
-			padding: 1em;
-		}
-	</style>
-</head>
-<body>
-	<p>You can add margin and padding to <span>inline elements</span>. However, this only push other elements horizontally, and not vertically.
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L5/concepts/13-inline-boxes/inline-elements-1.png b/lessons/L5/concepts/13-inline-boxes/inline-elements-1.png
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diff --git a/lessons/L5/concepts/13-inline-boxes/inline-elements-3.png b/lessons/L5/concepts/13-inline-boxes/inline-elements-3.png
deleted file mode 100755
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diff --git a/lessons/L5/concepts/14-semantic-elements/notes.md b/lessons/L5/concepts/14-semantic-elements/notes.md
deleted file mode 100644
index a74dea278..000000000
--- a/lessons/L5/concepts/14-semantic-elements/notes.md
+++ /dev/null
@@ -1,3 +0,0 @@
-Semantic elements can really help improve your website's search engine optimization. If you want to learn more about SEO, I recommend checking out [Moz's Beginners Guide to SEO](https://moz.com/beginners-guide-to-seo).
-
-Want to learn more about surfing the web with a screen reader? Here's a [quick video](https://classroom.udacity.com/courses/ud882/lessons/3574748851/concepts/37757186550923) from our [course on Responsive Images](https://udacity.com/ud882). The video focuses on images but there are some great links if you've never tried a screen reader before.
\ No newline at end of file
diff --git a/lessons/L5/concepts/14-semantic-elements/semantic-tags-1.png b/lessons/L5/concepts/14-semantic-elements/semantic-tags-1.png
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index 132cb03d7..000000000
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diff --git a/lessons/L5/concepts/14-semantic-elements/semantic-tags-4.png b/lessons/L5/concepts/14-semantic-elements/semantic-tags-4.png
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diff --git a/lessons/L5/concepts/14-semantic-elements/semantic-tags-5.png b/lessons/L5/concepts/14-semantic-elements/semantic-tags-5.png
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diff --git a/lessons/L5/concepts/15-types-of-elements/notes.md b/lessons/L5/concepts/15-types-of-elements/notes.md
deleted file mode 100644
index ac67cd64e..000000000
--- a/lessons/L5/concepts/15-types-of-elements/notes.md
+++ /dev/null
@@ -1,11 +0,0 @@
-You have _many_ different kinds of elements at your disposal. Almost all of them are either block or inline with the major differences being their default CSS styles. Check it out, [here’s a list](https://developer.mozilla.org/en-US/docs/Web/HTML/Element).
-
-The elements for [**content sectioning**](https://developer.mozilla.org/en-US/docs/Web/HTML/Element#Content_sectioning) are good for laying out things on the page. Notice that a lot of these have requirements for what should be inside the element, for example, an `<article>` typically includes a heading as a child element.
-
-[**Text content**](https://developer.mozilla.org/en-US/docs/Web/HTML/Element#Text_content) is good for text. There are a few from here that you’ve seen before, but there are some new ones as well.
-
-There are also [**inline text semantics**](https://developer.mozilla.org/en-US/docs/Web/HTML/Element#Inline_text_semantics). You’ll see familiar elements like `<em>` and `<span>`, but you’ve got others like `<code>`, which displays code in a monospace font. Also `<data>`, `<progress>`, `<time>`, and others.
-
-There are other categories, but take a look at the last category, [a graveyard of old elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Element#Obsolete_and_deprecated_elements). This is evidence of the way the web used to be. _Don’t use these_. They might work, but they aren’t guaranteed to continue working because they are no longer supported. Stick with the other elements and you’ll be fine.
-
-For the next quiz, you'll be asked to research these elements in order to select which ones should be used on an example website. Press "Next" to continue to the quiz.
\ No newline at end of file
diff --git a/lessons/L5/concepts/16-element-research/element-research.png b/lessons/L5/concepts/16-element-research/element-research.png
deleted file mode 100644
index c1392e296..000000000
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diff --git a/lessons/L5/concepts/16-element-research/element-research.py b/lessons/L5/concepts/16-element-research/element-research.py
deleted file mode 100644
index a83d0c7dc..000000000
--- a/lessons/L5/concepts/16-element-research/element-research.py
+++ /dev/null
@@ -1,93 +0,0 @@
-import re
-
-nav = widget_inputs["text1"].strip()
-article = widget_inputs["text2"].strip()
-h3 = widget_inputs["text3"].strip()
-footer = widget_inputs["text4"].strip()
-aside = widget_inputs["text5"].strip()
-img = widget_inputs["text6"].strip()
-
-comments = []
-congrats = ""
-def commentizer(new):
-	if new not in comments:
-		comments.append(new)
-
-is_correct = False
-
-def run_through_problems():
-	# check if student has submitted answer for each textbox
-	if not (nav and article and h3 and footer and aside and img):
-		commentizer("At least one of the text boxes is missing an answer. Make sure to answer each one.")
-		return False
-
-	# check first textbox
-	if re.match("<header>|<\/header>|^header$", nav):
-		commentizer("Almost! I'm looking for something a little more specific on number one.")
-		return False
-
-	if re.match("<div>|<\/div>|^div$|<section>|<\/section>|^section$", nav):
-		commentizer("That's too generic for number one. Try using an element that contains navigation links.")
-		return False
-
-	if not re.match("<nav>|<\/nav>|^nav$", nav):
-		commentizer("Are you sure about number one? Try using an element that contains navigation links.")
-		return False
-
-	# check second textbox
-	if re.match("<div>|<\/div>|^div$|<section>|<\/section>|^section$", article):
-		commentizer("That's too generic for number two. What sectioning element is intended to be reused?")
-		return False
-
-	if not re.match("<article>|<\/article>|^article$", article):
-		commentizer("Are you sure about number two? What sectioning element is intended to be reused?")
-		return False
-
-	# check third textbox
-	if re.match("<h[4-6]>|<\/h[4-6]>|^h[4-6]$", h3):
-		commentizer("Almost! `" + str(h3) + "` is a little too small for number three. Try using a bigger heading.")
-		return False
-
-	if re.match("<div>|<\/div>|^div$", h3):
-		commentizer("You can use something better than a `" + str(h3) + "` for number three.")
-		return False
-
-	if not re.match("<h[1-3]>|<\/h[1-3]>|^h[1-3]$", h3):
-		commentizer("Are you sure about number three? What types of elements do you typically use for important text?")
-		return False
-
-	# check fourth textbox
-	if re.match("<div>|<\/div>|^div$|<section>|<\/section>|^section$", footer):
-		commentizer("That's too generic for number four. Look at the text in bottom-right corner, that's a clue!")
-		return False
-
-	if not re.match("<footer>|<\/footer>|^footer$", footer):
-		commentizer("Are you sure about number four? What element normally appears at the bottom of a page?")
-		return False
-
-	# check fifth textbox
-	if re.match("<div>|<\/div>|^div$|<section>|<\/section>|^section$", aside):
-		commentizer("That's too generic for number five. Hint: Do you see how this element is positioned with respect to the rest of the page?")
-		return False
-
-	if not re.match("<aside>|<\/aside>|^aside$", aside):
-		commentizer("Are you sure about number five? That looks like a sidebar... what element often represent sidebars?")
-		return False
-
-	# check sixth textbox
-	if not re.match("<video>|<\/video>|^video$|<picture>|<\/picture>|^picture$|<figure>|<\/figure>|^figure$|<img>|<\/img>|^img$", img):
-		commentizer("Are you sure about number five? You should be looking for a type of media element.")
-		return False
-	return False
-
-if (re.match("<nav>|<\/nav>|^nav$", nav) and re.match("<article>|<\/article>|^article$", article) and re.match("<h[1-3]>|<\/h[1-3]>|^h[1-3]$", h3) and re.match("<footer>|<\/footer>|^footer$", footer) and re.match("<aside>|<\/aside>|^aside$", aside) and re.match("<video>|<\/video>|^video$|<picture>|<\/picture>|^picture$|<figure>|<\/figure>|^figure$|<img>|<\/img>|^img$", img)):
-	congrats = "Nice job! You'll thank yourself later for using semantic elements."
-	is_correct = True
-else:
-	run_through_problems()
-
-if is_correct:
-	commentizer(congrats)
-
-grade_result["comment"] = "\n\n".join(comments)
-grade_result["correct"] = is_correct
\ No newline at end of file
diff --git a/lessons/L5/concepts/16-element-research/image-form.jpeg b/lessons/L5/concepts/16-element-research/image-form.jpeg
deleted file mode 100644
index 84d6c05c2..000000000
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diff --git a/lessons/L5/concepts/16-element-research/instructions.md b/lessons/L5/concepts/16-element-research/instructions.md
deleted file mode 100644
index a740e21c6..000000000
--- a/lessons/L5/concepts/16-element-research/instructions.md
+++ /dev/null
@@ -1,10 +0,0 @@
-## Instructions
-
-### [Do some research on semantic elements](https://developer.mozilla.org/en-US/docs/Web/HTML/Element) and enter the most appropriate elements to use in the outlined areas (format your answer as `<tag>` or `tag`).
-
-![this website](http://udacity.github.io/fend/lessons/L5/concepts/16-element-research/element-research.png)
-
-### Image Credit
-
-- 'Picture Icon' by [Icomoon](http://www.flaticon.com/authors/icomoon) via FlatIcon, Creative Commons.
-- 'Copyright Icon' by [Vaadin](http://www.flaticon.com/authors/vaadin) via FlatIcon, Creative Commons.
\ No newline at end of file
diff --git a/lessons/L5/keynotes/lesson5.key b/lessons/L5/keynotes/lesson5.key
deleted file mode 100755
index abd0d5af3..000000000
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diff --git a/lessons/L5/problem-set/01-welcome-to-the-problem-set/kevin-hart-congratulations.gif b/lessons/L5/problem-set/01-welcome-to-the-problem-set/kevin-hart-congratulations.gif
deleted file mode 100644
index 78aa21330..000000000
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diff --git a/lessons/L5/problem-set/01-welcome-to-the-problem-set/notes.md b/lessons/L5/problem-set/01-welcome-to-the-problem-set/notes.md
deleted file mode 100644
index 27c49189b..000000000
--- a/lessons/L5/problem-set/01-welcome-to-the-problem-set/notes.md
+++ /dev/null
@@ -1,9 +0,0 @@
-### Welcome to the Box Model and Semantics problem set!
-
-If you've made it this far, then you're really starting to get the hang of this whole CSS thing. Take a moment to congratulate yourself for a job well done!
-
-![congratulations-gif](http://udacity.github.io/fend/lessons/L5/problem-set/01-welcome-to-the-problem-set/kevin-hart-congratulations.gif)
-
-Now that you're done celebrating, it's time to keep moving forward. In this problem set, you'll be challenged to use your knowledge of the box model and semantics to complete exercises. Along the way, you'll also be introduced to new topics that we haven't covered yet, but don't worry, I'll provide detailed explanations and links to helpful documentation in case you get stuck.
-
-So are you ready to get begin? Click "Next" to start the problem set. Good luck!
\ No newline at end of file
diff --git a/lessons/L5/problem-set/02-keep-it-boxy/answer.md b/lessons/L5/problem-set/02-keep-it-boxy/answer.md
deleted file mode 100644
index 74bbd6c15..000000000
--- a/lessons/L5/problem-set/02-keep-it-boxy/answer.md
+++ /dev/null
@@ -1,39 +0,0 @@
-Here's what you should have seen when you started the quiz.
-
-![start image](http://udacity.github.io/fend/lessons/L5/problem-set/02-keep-it-boxy/boxy-1.png)
-
-One thing you might not have noticed immediately is that the container is actually 510 pixels wide even though it is clearly set to 500 pixels in the CSS...
-
-```css
-.container {
-  width: 500px;
-  border: 5px solid #2E3D49;
-  /* ... */
-}
-```
-
-The reason for this is because our webpage is using `box-sizing: content-box`, so the `border` is also being included in the width calculation of the container. But that's not a huge deal, right? You could simply set the `width` of the container to be 490 pixels, and then after you add the additional `border`, the container would actually measure to be 500 pixels wide. Ah ha, problem solved!
-
-### Well... not quite...
-
-The next issue, the one you probably did notice (if you completed the tests in order), is as you set the `width` and `padding` of the interior boxes, the measurements do not match up to how you would logically think of them being displayed.
-
-![before border-box image](http://udacity.github.io/fend/lessons/L5/problem-set/02-keep-it-boxy/boxy-2.png)
-
-For example, on Box 3 you were asked to set the following...
-
-```css
-.child-3 {
-  /* ... */
-  width: 80%;
-  padding: 20%;
-}
-```
-
-It would make sense for this CSS to display Box 3 as taking up 80% of the `width` within the container, while 20% would be leftover for `padding`. Unfortunately, that's not what you see. Why? Again, `content-box` is really misleading us by not including `padding` or `border` as part of the element's width calculation.
-
-### The Final Answer
-
-If you made it far enough to complete the quiz, then you will have swapped out `content-box` with the preferred `border-box` and seen the following result. Isn't it an incredible difference! This is much better way of handling `box-sizing` as it really communicates what is desrcibed in the CSS.
-
-![finish image](http://udacity.github.io/fend/lessons/L5/problem-set/02-keep-it-boxy/boxy-3.png)
\ No newline at end of file
diff --git a/lessons/L5/problem-set/02-keep-it-boxy/boxy-1.png b/lessons/L5/problem-set/02-keep-it-boxy/boxy-1.png
deleted file mode 100644
index c3e965ffa..000000000
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diff --git a/lessons/L5/problem-set/02-keep-it-boxy/boxy-2.png b/lessons/L5/problem-set/02-keep-it-boxy/boxy-2.png
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index da5e12a33..000000000
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diff --git a/lessons/L5/problem-set/02-keep-it-boxy/boxy-3.png b/lessons/L5/problem-set/02-keep-it-boxy/boxy-3.png
deleted file mode 100644
index 672dc3414..000000000
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diff --git a/lessons/L5/problem-set/02-keep-it-boxy/css/original.css b/lessons/L5/problem-set/02-keep-it-boxy/css/original.css
deleted file mode 100644
index 5a9f6110f..000000000
--- a/lessons/L5/problem-set/02-keep-it-boxy/css/original.css
+++ /dev/null
@@ -1,41 +0,0 @@
-* {
-	box-sizing: border-box;
-}
-.container {
-	width: 500px;
-	border: 5px solid #2E3D49;
-	background: #2E3D49;
-	background: rgba(46, 61, 73, 0.3);
-}
-.box-1 {
-	width: 25%;
-	padding: 1em;
-	border: 5px solid #F4442F;
-	background: #F4442F;
-	background: rgba(244, 68, 47, 0.3);
-}
-.box-2 {
-	width: 90%;
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-	font-size: 18px;
-	text-align: center;
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\ No newline at end of file
diff --git a/lessons/L5/problem-set/02-keep-it-boxy/css/styles.css b/lessons/L5/problem-set/02-keep-it-boxy/css/styles.css
deleted file mode 100644
index 48832b921..000000000
--- a/lessons/L5/problem-set/02-keep-it-boxy/css/styles.css
+++ /dev/null
@@ -1,36 +0,0 @@
-* {
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diff --git a/lessons/L5/problem-set/02-keep-it-boxy/ie-box-model-diagram.png b/lessons/L5/problem-set/02-keep-it-boxy/ie-box-model-diagram.png
deleted file mode 100644
index 544d3b7fc..000000000
Binary files a/lessons/L5/problem-set/02-keep-it-boxy/ie-box-model-diagram.png and /dev/null differ
diff --git a/lessons/L5/problem-set/02-keep-it-boxy/image-form.jpeg b/lessons/L5/problem-set/02-keep-it-boxy/image-form.jpeg
deleted file mode 100644
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diff --git a/lessons/L5/problem-set/02-keep-it-boxy/index.html b/lessons/L5/problem-set/02-keep-it-boxy/index.html
deleted file mode 100644
index 4f37d747d..000000000
--- a/lessons/L5/problem-set/02-keep-it-boxy/index.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Keep it Boxy</title>
-	<link href="css/styles.css" rel="stylesheet">
-	<meta name="udacity-grader" content="tests.json" unit-tests="js/tests.js">
-</head>
-<body>
-	<div class="container">
-		<div class="box-1">
-			<p>Box 1</p>
-		</div>
-		<div class="box-2">
-			<p>Box 2</p>
-		</div>
-		<div class="box-3">
-			<p>Box 3</p>
-		</div>
-		<div class="box-4">
-			<p>Box 4</p>
-		</div>
-	</div>
-</body>
-<script type="text/javascript" src="js/jquery-3.0.0.min.js"></script>
-</html>
diff --git a/lessons/L5/problem-set/02-keep-it-boxy/instructions.md b/lessons/L5/problem-set/02-keep-it-boxy/instructions.md
deleted file mode 100644
index 5e96a1a49..000000000
--- a/lessons/L5/problem-set/02-keep-it-boxy/instructions.md
+++ /dev/null
@@ -1,10 +0,0 @@
-### How to Complete this Quiz
-
-1. Open [this webpage](http://udacity.github.io/fend/lessons/L5/problem-set/02-keep-it-boxy/index.html) with Chrome.
-2. Turn on the [Udacity Feedback Chrome Extension](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345403/modules/742847927175460/lessons/7323812069/concepts/73256617910923).
-3. Use Developer Tools to pass all the tests.
-4. Copy and paste the code that appears into the next page to finish!
-
-<br>
-
-Good luck!
\ No newline at end of file
diff --git a/lessons/L5/problem-set/02-keep-it-boxy/js/jquery-3.0.0.min.js b/lessons/L5/problem-set/02-keep-it-boxy/js/jquery-3.0.0.min.js
deleted file mode 100644
index 62d410d95..000000000
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diff --git a/lessons/L5/problem-set/02-keep-it-boxy/js/tests.js b/lessons/L5/problem-set/02-keep-it-boxy/js/tests.js
deleted file mode 100644
index bceb1537a..000000000
--- a/lessons/L5/problem-set/02-keep-it-boxy/js/tests.js
+++ /dev/null
@@ -1,186 +0,0 @@
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-	function checkBorderBox() {
-		if($("*").css("box-sizing") === "border-box") {
-			return true;
-		} else {
-			return false;
-		}
-	}
-
-	var tests = [];
-
-	var test1 = function() {
-		var _isCorrect = false;
-		var box1 = $(".box-1");
-		var box1ValidWidths = {
-			contentBoxWidth: 125,
-			borderBoxNoPaddingLowerWidth: 112,
-			borderBoxNoPaddingUpperWidth: 114,
-			borderBoxWithPaddingLowerWidth: 80,
-			borderBoxWithPaddingUpperWidth: 82
-		}
-
-		if(checkBorderBox() === true && box1.css("padding") === "0px") {
-			if(box1.width() >= box1ValidWidths.borderBoxNoPaddingLowerWidth && box1.width() <= box1ValidWidths.borderBoxNoPaddingUpperWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-1', {'detail': 'passed'}));
-			}
-		} else if(checkBorderBox() === true && box1.css("padding") !== "0px") {
-			if(box1.width() >= box1ValidWidths.borderBoxWithPaddingLowerWidth && box1.width() <= box1ValidWidths.borderBoxWithPaddingUpperWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-1', {'detail': 'passed'}));
-			}
-		} else {
-			if(Math.round(box1.width()) === box1ValidWidths.contentBoxWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-1', {'detail': 'passed'}));
-			}
-		}
-
-		return _isCorrect;
-  	};
-
-	var test2 = function() {
-		var _isCorrect = false;
-		var box2 = $(".box-2");
-		var box2ValidWidths = {
-			contentBoxWidth: 450,
-			borderBoxNoPaddingLowerWidth: 431,
-			borderBoxNoPaddingUpperWidth: 433,
-			borderBoxWithPaddingLowerWidth: 335,
-			borderBoxWithPaddingUpperWidth: 337
-		}
-
-		if(checkBorderBox() === true && box2.css("padding") === "0px") {
-			if(box2.width() >= box2ValidWidths.borderBoxNoPaddingLowerWidth && box2.width() <= box2ValidWidths.borderBoxNoPaddingUpperWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-2', {'detail': 'passed'}));
-			}
-		} else if(checkBorderBox() === true && box2.css("padding") !== "0px") {
-			if(box2.width() >= box2ValidWidths.borderBoxWithPaddingLowerWidth && box2.width() <= box2ValidWidths.borderBoxWithPaddingUpperWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-2', {'detail': 'passed'}));
-			}
-		} else if(checkBorderBox() === false) {
-			if(Math.round(box2.width()) === box2ValidWidths.contentBoxWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-2', {'detail': 'passed'}));
-			}
-		}
-
-		return _isCorrect;
-  	};
-
-	var test3 = function() {
-		var _isCorrect = false;
-		var box3 = $(".box-3");
-		var box3ValidWidths = {
-			contentBoxWidth: 400,
-			borderBoxNoPaddingLowerWidth: 382,
-			borderBoxNoPaddingUpperWidth: 384,
-			borderBoxWithPaddingLowerWidth: 186,
-			borderBoxWithPaddingUpperWidth: 188
-		}
-
-		if(checkBorderBox() === true && box3.css("padding") === "0px") {
-			if(box3.width() >= box3ValidWidths.borderBoxNoPaddingLowerWidth && box3.width() <= box3ValidWidths.borderBoxNoPaddingUpperWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-3', {'detail': 'passed'}));
-			}
-		} else if(checkBorderBox() === true && box3.css("padding") !== "0px") {
-			if(box3.width() >= box3ValidWidths.borderBoxWithPaddingLowerWidth && box3.width() <= box3ValidWidths.borderBoxWithPaddingUpperWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-3', {'detail': 'passed'}));
-			}
-		} else if(checkBorderBox() === false) {
-			if(Math.round(box3.width()) === box3ValidWidths.contentBoxWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-3', {'detail': 'passed'}));
-			}
-		}
-
-		return _isCorrect;
-  	};
-
-	var test4 = function() {
-		var _isCorrect = false;
-		var box4 = $(".box-4");
-		var box4ValidWidths = {
-			contentBoxWidth: 250,
-			borderBoxNoPaddingLowerWidth: 235,
-			borderBoxNoPaddingUpperWidth: 237,
-			borderBoxWithPaddingLowerWidth: 215,
-			borderBoxWithPaddingUpperWidth: 217
-		}
-
-		if(checkBorderBox() === true && box4.css("padding") === "0px") {
-			if(box4.width() >= box4ValidWidths.borderBoxNoPaddingLowerWidth && box4.width() <= box4ValidWidths.borderBoxNoPaddingUpperWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-4', {'detail': 'passed'}));
-			}
-		} else if(checkBorderBox() === true && box4.css("padding") !== "0px") {
-			if(box4.width() >= box4ValidWidths.borderBoxWithPaddingLowerWidth && box4.width() <= box4ValidWidths.borderBoxWithPaddingUpperWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-4', {'detail': 'passed'}));
-			}
-		} else if(checkBorderBox() === false) {
-			if(Math.round(box4.width()) === box4ValidWidths.contentBoxWidth) {
-				_isCorrect = true;
-				window.dispatchEvent(new CustomEvent('custom-event-4', {'detail': 'passed'}));
-			}
-		}
-
-		return _isCorrect;
-  	};
-
-  	var test5 = function() {
-		var _isCorrect = false;
-		var box4Padding = parseInt($(".box-3").css("padding"));
-
-		if(box4Padding >= 98 && box4Padding <= 100) {
-			_isCorrect = true;
-			window.dispatchEvent(new CustomEvent('custom-event-5', {'detail': 'passed'}));
-		}
-
-		return _isCorrect;
-  	};
-
-	tests.push(test1);
-	tests.push(test2);
-	tests.push(test3);
-	tests.push(test4);
-	tests.push(test5);
-
-	var isCorrect = false;
-
-	function executeTests() {
-		var isCorrect = false;
-
-		tests.forEach(function(test, index) {
-			var testCorrect = test();
-			if (index === 0) {
-				isCorrect = testCorrect;
-			} else {
-				isCorrect = isCorrect && testCorrect;
-			}
-			if (testCorrect) {
-				// to prevent unnecessary event firings
-				test = function() {};
-			}
-		});
-
-		return isCorrect;
-	}
-
-	isCorrect = executeTests();
-
-	var interval = window.setInterval(function() {
-		if (!isCorrect) {
-	  		isCorrect = executeTests();
-		} else {
-	  		window.clearInterval(interval);
-		}
-	}, 1000);
-})(window);
\ No newline at end of file
diff --git a/lessons/L5/problem-set/02-keep-it-boxy/original-box-model-diagram.png b/lessons/L5/problem-set/02-keep-it-boxy/original-box-model-diagram.png
deleted file mode 100644
index 3d159c9c0..000000000
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diff --git a/lessons/L5/problem-set/02-keep-it-boxy/original.html b/lessons/L5/problem-set/02-keep-it-boxy/original.html
deleted file mode 100644
index 69dca40bd..000000000
--- a/lessons/L5/problem-set/02-keep-it-boxy/original.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Keep it Boxy</title>
-	<link href="css/original.css" rel="stylesheet">
-	<meta name="udacity-grader" content="tests.json" unit-tests="js/tests.js">
-</head>
-<body>
-	<div class="container">
-		<div class="box-1">
-			<p>Box 1</p>
-		</div>
-		<div class="box-2">
-			<p>Box 2</p>
-		</div>
-		<div class="box-3">
-			<p>Box 3</p>
-		</div>
-		<div class="box-4">
-			<p>Box 4</p>
-		</div>
-	</div>
-</body>
-<script type="text/javascript" src="js/jquery-3.0.0.min.js"></script>
-</html>
diff --git a/lessons/L5/problem-set/02-keep-it-boxy/question.md b/lessons/L5/problem-set/02-keep-it-boxy/question.md
deleted file mode 100644
index 3035bda2a..000000000
--- a/lessons/L5/problem-set/02-keep-it-boxy/question.md
+++ /dev/null
@@ -1,35 +0,0 @@
-For your first quiz, let's revisit that troublesome `box-sixing` property. But, before you get started, here's a little history lesson on why the `box-sizing` property exists today. Who said you can't learn a little history while learning front-end web development!
-
-As a quick reminder, `box-sizing` is the property that determines how to calculate the `height` and `width` of elements. This would seem like a fairly straightforward calculation; however, it starts to get confusing when you add `padding` and `border`. Here's why...
-
-## History of the Box Model
-
-In the mid-to-late 90s, when the first verion of CSS was released, CSS1, the [W3C](https://www.w3.org/) released a spec for how to define the `box-model` using [this diagram](https://www.w3.org/TR/CSS1/#formatting-model).
-
-![original box model diagram](http://udacity.github.io/fend/lessons/L5/problem-set/02-keep-it-boxy/original-box-model-diagram.png)
-
-_W3C's original box model is still considered the default and is used by passing the value content-box to the box-sizing property._
-
-Afterwards, they left it up to the browser developers to decide how they should support this specification, and herein lies the source for all the confusion. Out of all the browsers, Microsoft's Internet Explorer chose to support the specification using a slight modification to the diagram. Instead of considering an element's `width` to be only the `width` of the content, they decided to also include both `padding` and `border`.
-
-![IE's box model diagram](http://udacity.github.io/fend/lessons/L5/problem-set/02-keep-it-boxy/ie-box-model-diagram.png)
-
-_Internet Explorer's box model has become widely adopted by most modern websites and is used by passing the value border-box to the box-sizing property._
-
-Thus, you had the [most popular browser](http://www.w3schools.com/browsers/browsers_stats.asp) in the 90s, using a different diagram than what was outlined by the W3C. Eventually Microsoft decided to add support for the original box model in their release of IE6 in 2001, but the memory of their box model still resonated with developers and it wouldn't be long until IE's version of the box model would make a resurgence.
-
-## What Happened Next?
-
-On [January 9, 2007](http://www.apple.com/pr/library/2007/01/09Apple-Reinvents-the-Phone-with-iPhone.html), Apple released its first version of the iPhone with a mobile browser. This changed the game and eventually lead to the birth of what we know today as responsive design!
-
-![oooohhhh gif](http://udacity.github.io/fend/lessons/L5/problem-set/02-keep-it-boxy/toy-story-oooohhhh.gif)
-
-[Responsive design](https://en.wikipedia.org/wiki/Responsive_web_design) is the process of building websites that provide an optimal viewing and interaction experience regardless of the size of the device; you'll be learning about responsive design very soon! But what does responsive design have to do with the box model?
-
-Well, part of responsive design is building fluid designs that **respond** well to different widths, but this is challenging when using the original box model. For example, you might want to set the `width` of a column to be a particular value or percentage, only to be deceived after adding `padding` and `border`. Examples like this created a ton of extra work for designers, so they decided it was time for a change. And a change they received because soon thereafter W3C included the `box-sizing` property in CSS3!
-
-## The Box-Sizing Property
-
-Today, all current versions of modern browsers support the `box-sizing` property. By default, `box-sizing` is still set to `content-box` which uses the original method for calculating an element's size; however, you can change this by passing it the value `border-box`. Using `border-box` will include both `padding` and `border` as part of the element's size.
-
-For this quiz, you'll experience the difference between using `content-box` and `border-box` as you set the `width` and `padding` of a few child elements inside a container.
\ No newline at end of file
diff --git a/lessons/L5/problem-set/02-keep-it-boxy/tests.json b/lessons/L5/problem-set/02-keep-it-boxy/tests.json
deleted file mode 100644
index 97bda0bfc..000000000
--- a/lessons/L5/problem-set/02-keep-it-boxy/tests.json
+++ /dev/null
@@ -1,73 +0,0 @@
-[{
-  "name": "Keep it Boxy",
-  "code": "whatsInTheBOX",
-  "tests": [
-    {
-      "description": "Set the width of Box 1 to 25%",
-      "definition": {
-        "waitForEvent": "custom-event-1",
-        "exists": true
-      }
-    },
-    {
-      "description": "Set the padding of Box 1 to 1em",
-      "definition": {
-        "nodes": ".box-1",
-        "cssProperty": "padding",
-        "equals": "16px"
-      }
-    },
-    {
-      "description": "Set the width of Box 2 to 90%",
-      "definition": {
-        "waitForEvent": "custom-event-2",
-        "exists": true
-      }
-    },
-    {
-      "description": "Set the padding of Box 2 to 3em",
-      "definition": {
-        "nodes": ".box-2",
-        "cssProperty": "padding",
-        "equals": "48px"
-      }
-    },
-    {
-      "description": "Set the width of Box 3 to 80%",
-      "definition": {
-        "waitForEvent": "custom-event-3",
-        "exists": true
-      }
-    },
-    {
-      "description": "Set the padding of Box 3 to 20%",
-      "definition": {
-        "waitForEvent": "custom-event-5",
-        "exists": true
-      }
-    },
-    {
-      "description": "Set the width of Box 4 to 50%",
-      "definition": {
-        "waitForEvent": "custom-event-4",
-        "exists": true
-      }
-    },
-    {
-      "description": "Set the padding of Box 4 to 10px",
-      "definition": {
-        "nodes": ".box-4",
-        "cssProperty": "padding",
-        "equals": "10px"
-      }
-    },
-    {
-      "description": "Change page's box-sizing to border-box",
-      "definition": {
-        "nodes": "*",
-        "cssProperty": "boxSizing",
-        "equals": "border-box"
-      }
-    }
-  ]
-}]
\ No newline at end of file
diff --git a/lessons/L5/problem-set/02-keep-it-boxy/toy-story-oooohhhh.gif b/lessons/L5/problem-set/02-keep-it-boxy/toy-story-oooohhhh.gif
deleted file mode 100644
index d2e306ef6..000000000
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diff --git a/lessons/L5/problem-set/03-alignment-and-line-height/margin-border-quirk.png b/lessons/L5/problem-set/03-alignment-and-line-height/margin-border-quirk.png
deleted file mode 100644
index c4c2a87ca..000000000
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diff --git a/lessons/L5/problem-set/03-alignment-and-line-height/notes.md b/lessons/L5/problem-set/03-alignment-and-line-height/notes.md
deleted file mode 100644
index fde6cfc49..000000000
--- a/lessons/L5/problem-set/03-alignment-and-line-height/notes.md
+++ /dev/null
@@ -1,13 +0,0 @@
-If you recall back from [earlier in this lesson](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345404/modules/8efdb4f7-48e4-4bdc-8e67-d242399618b1/lessons/671da3f2-d72f-401f-a882-bdf6f026746b/concepts/6ffb0b7d-b60b-44b6-bf2d-17b94ae8ed22), you learned that inline elements create **line boxes**. If an inline element exceeds the space available inside its container, it will create multiple lines boxes.
-
-![example of line boxes from previous lesson](http://udacity.github.io/fend/lessons/L5/problem-set/03-alignment-and-line-height/wrapping-inline.png)
-
-You also learned that inline elements, and line boxes, have some interesting quirks. For example, you cannot set the `height` or `width` of an inline element, which means you cannot set the `height` or `width` of a line box either. Another quirk is when an inline element creates multiple line boxes, left/right `border` and `margin` are added at the beginning of the first line box and end of the last line box.
-
-![margin and border quirk with inline elements](http://udacity.github.io/fend/lessons/L5/problem-set/03-alignment-and-line-height/margin-border-quirk.png)
-
-So with that said, what other properties can you use to manipulate line boxes?
-
-For the next three quizzes, you'll be experimenting with the three new properties that control the horizontal and vertical alignment of line boxes, as well as their height: `text-align` , `vertical-align` , and `line-height`.
-
-When you're ready to get started, click "Next".
\ No newline at end of file
diff --git a/lessons/L5/problem-set/03-alignment-and-line-height/wrapping-inline.png b/lessons/L5/problem-set/03-alignment-and-line-height/wrapping-inline.png
deleted file mode 100644
index 9a1a0a857..000000000
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diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/answer.md b/lessons/L5/problem-set/04-text-align-with-cheetahs/answer.md
deleted file mode 100644
index 6b14b13f3..000000000
--- a/lessons/L5/problem-set/04-text-align-with-cheetahs/answer.md
+++ /dev/null
@@ -1,19 +0,0 @@
-Great job! I've added pictures of each completed `<div>` below.
-
-![first div answer](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/text-align-1.png)
-
-![second div answer](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/text-align-2.png)
-
-![third div answer](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/text-align-3.png)
-
-![fourth div answer](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/text-align-4.png)
-
-![fifth div answer](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/text-align-5.png)
-
-### Wrapping Text Around Images with Floats
-
-If you worked the tests in order, then you should have seen something like this after completing the fifth test:
-
-![fifth div before float](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/text-align-6.png)
-
-It wasn't until after you added `float: right` to the image that you saw the text suddenly floated alongside it. Floats work great for wrapping text around images, but they can also be used to create entire web layouts! In the next lesson, you'll work more closely with floats as we discuss how to position elements. For now, click "Next" to start the next quiz.
\ No newline at end of file
diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/baby-cheetah.jpg b/lessons/L5/problem-set/04-text-align-with-cheetahs/baby-cheetah.jpg
deleted file mode 100644
index 8fb0e720b..000000000
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diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/css/answer.css b/lessons/L5/problem-set/04-text-align-with-cheetahs/css/answer.css
deleted file mode 100644
index b3628f018..000000000
--- a/lessons/L5/problem-set/04-text-align-with-cheetahs/css/answer.css
+++ /dev/null
@@ -1,16 +0,0 @@
-.left {
-	text-align: left;
-}
-.center {
-	text-align: center;
-}
-.right {
-	text-align: right;
-}
-.justify {
-	text-align: justify;
-}
-.floated-image {
-	float: right;
-	padding-left: 1em;
-}
\ No newline at end of file
diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/css/styles.css b/lessons/L5/problem-set/04-text-align-with-cheetahs/css/styles.css
deleted file mode 100644
index eec4844db..000000000
--- a/lessons/L5/problem-set/04-text-align-with-cheetahs/css/styles.css
+++ /dev/null
@@ -1,32 +0,0 @@
-body {
-	width: 750px;
-}
-div {
-	font-size: 21px;
-	padding: 1em;
-	margin: 4em 0;
-}
-
-.one {
-  text-align: right;
-  background: #E64777; border: 5px solid #F32C68;
-}
-.two {
- background: #4560B2; border: 5px solid #4960A3;
-}
-.three {
- background: #8EE546; border: 5px solid #91CB61;
-}
-.four {
- background: #FFC74E; border: 5px solid #FFBD2E;
-}
-.five {
- background: #40BE8E; border: 5px solid #56AB8B;
-}
-
-.one {
-	margin-top: 0.2em;
-}
-.five {
-	overflow: hidden;
-}
\ No newline at end of file
diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/final-div-5.jpg b/lessons/L5/problem-set/04-text-align-with-cheetahs/final-div-5.jpg
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diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/image-form.jpeg b/lessons/L5/problem-set/04-text-align-with-cheetahs/image-form.jpeg
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index 17f463380..000000000
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diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/img/baby-cheetah.jpg b/lessons/L5/problem-set/04-text-align-with-cheetahs/img/baby-cheetah.jpg
deleted file mode 100644
index 8fb0e720b..000000000
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diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/index.html b/lessons/L5/problem-set/04-text-align-with-cheetahs/index.html
deleted file mode 100644
index ca7ed2a82..000000000
--- a/lessons/L5/problem-set/04-text-align-with-cheetahs/index.html
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Text-align with Cheetahs</title>
-	<link href="css/styles.css" rel="stylesheet">
-	<meta name="udacity-grader" content="tests.json" unit-tests="js/tests.js">
-</head>
-<body>
-	<div class="one">
-		<p>Sheet galleon splice the main brace come about ho ballast marooned poop deck snow bilge rat. Spirits black jack holystone heave down quarterdeck lad log grapple trysail cackle fruit. Pirate Nelsons folly mizzen jib pink belay ye boom plunder crow's nest.</p>
-	</div>
-	<div class="two">
-		<img src="img/baby-cheetah.jpg" alt="baby cheetah">
-	</div>
-	<div class="three">
-		<img src="img/baby-cheetah.jpg" alt="baby cheetah">
-		<p>Long boat Buccaneer splice the main brace parley Jack Ketch blow the man down spanker yard broadside Privateer. Salmagundi pirate gangway scuttle yardarm run a rig aye Chain Shot gabion spanker. Matey no prey, no pay topmast chantey scuttle spanker pinnace cutlass heave down tackle.</p>
-	</div>
-	<div class="four">
-		<p>Keelhaul cutlass yo-ho-ho Barbary Coast cog Sink me reef sails holystone trysail fore. Hands smartly quarter heave to chase guns Yellow Jack clipper driver lugsail swing the lead. Admiral of the Black line Jack Ketch maroon stern topmast jury mast scurvy ho nipper.</p>
-	</div>
-	<div class="five">
-		<img class="floated-image" src="img/baby-cheetah.jpg" alt="baby cheetah">
-		<p>League yo-ho-ho aft Chain Shot to go on account chase guns lanyard clap of thunder Jack Tar Shiver me timbers. Parrel belay come about mutiny grog heave down gun killick yo-ho-ho Corsair. Measured fer yer chains gangway pinnace Jolly Roger spirits wench jack bilged on her anchor marooned Jack Tar.</p>
-	</div>
-</body>
-<script type="text/javascript" src="js/jquery-3.0.0.min.js"></script>
-</html>
diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/instructions.md b/lessons/L5/problem-set/04-text-align-with-cheetahs/instructions.md
deleted file mode 100644
index 64065575f..000000000
--- a/lessons/L5/problem-set/04-text-align-with-cheetahs/instructions.md
+++ /dev/null
@@ -1,14 +0,0 @@
-### How to Complete this Quiz
-
-The first four `<div>`s just need text alignment fixes, but the last `<div>` needs a bit more work too. Take a look at this before you get started:
-
-![more detailed view of the fifth div showing left padding on image and float: right on image.](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/final-div-5.jpg)
-
-1. Open [this webpage](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/index.html) with Chrome.
-2. Turn on the [Udacity Feedback Chrome Extension](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345403/modules/742847927175460/lessons/7323812069/concepts/73256617910923).
-3. Use Developer Tools to make the page look [like this](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/final.jpg) to pass all the tests.
-4. Copy and paste the code that appears into the next page to finish!
-
-<br>
-
-Good luck!
\ No newline at end of file
diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/js/jquery-3.0.0.min.js b/lessons/L5/problem-set/04-text-align-with-cheetahs/js/jquery-3.0.0.min.js
deleted file mode 100644
index 62d410d95..000000000
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+++ /dev/null
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diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/js/tests.js b/lessons/L5/problem-set/04-text-align-with-cheetahs/js/tests.js
deleted file mode 100644
index 687495ba9..000000000
--- a/lessons/L5/problem-set/04-text-align-with-cheetahs/js/tests.js
+++ /dev/null
@@ -1,55 +0,0 @@
-(function(window) {
-
-	var tests = [];
-
-	var test1 = function() {
-		var _isCorrect = false;
-
-		// get padding
-		var paddingTop = $(".floated-image").css('padding-top');
-		var paddingBottom = $(".floated-image").css('padding-bottom');
-		var paddingLeft = $(".floated-image").css('padding-left');
-		var paddingRight = $(".floated-image").css('padding-right');
-
-		if(paddingTop === "0px" && paddingBottom === "0px" && paddingRight === "0px") {
-			if(paddingLeft === "21px") {
-				window.dispatchEvent(new CustomEvent('custom-event-1', {'detail': 'passed'}));
-			}
-		}
-
-		return _isCorrect;
-  	};
-
-	tests.push(test1);
-
-	var isCorrect = false;
-
-	function executeTests() {
-		var isCorrect = false;
-
-		tests.forEach(function(test, index) {
-			var testCorrect = test();
-			if (index === 0) {
-				isCorrect = testCorrect;
-			} else {
-				isCorrect = isCorrect && testCorrect;
-			}
-			if (testCorrect) {
-				// to prevent unnecessary event firings
-				test = function() {};
-			}
-		});
-
-		return isCorrect;
-	}
-
-	isCorrect = executeTests();
-
-	var interval = window.setInterval(function() {
-		if (!isCorrect) {
-	  		isCorrect = executeTests();
-		} else {
-	  		window.clearInterval(interval);
-		}
-	}, 1000);
-})(window);
\ No newline at end of file
diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/original.html b/lessons/L5/problem-set/04-text-align-with-cheetahs/original.html
deleted file mode 100644
index 97798022f..000000000
--- a/lessons/L5/problem-set/04-text-align-with-cheetahs/original.html
+++ /dev/null
@@ -1,30 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Text-align with Cheetahs</title>
-	<link href="css/styles.css" rel="stylesheet">
-	<link href="css/answer.css" rel="stylesheet">
-	<meta name="udacity-grader" content="tests.json" unit-tests="js/tests.js">
-</head>
-<body>
-	<div class="one left">
-		<p>Sheet galleon splice the main brace come about ho ballast marooned poop deck snow bilge rat. Spirits black jack holystone heave down quarterdeck lad log grapple trysail cackle fruit. Pirate Nelsons folly mizzen jib pink belay ye boom plunder crow's nest.</p>
-	</div>
-	<div class="two center">
-		<img src="img/baby-cheetah.jpg" alt="baby cheetah">
-	</div>
-	<div class="three right">
-		<img src="img/baby-cheetah.jpg" alt="baby cheetah">
-		<p>Long boat Buccaneer splice the main brace parley Jack Ketch blow the man down spanker yard broadside Privateer. Salmagundi pirate gangway scuttle yardarm run a rig aye Chain Shot gabion spanker. Matey no prey, no pay topmast chantey scuttle spanker pinnace cutlass heave down tackle.</p>
-	</div>
-	<div class="four justify">
-		<p>Keelhaul cutlass yo-ho-ho Barbary Coast cog Sink me reef sails holystone trysail fore. Hands smartly quarter heave to chase guns Yellow Jack clipper driver lugsail swing the lead. Admiral of the Black line Jack Ketch maroon stern topmast jury mast scurvy ho nipper.</p>
-	</div>
-	<div class="five right">
-		<img class="floated-image" src="img/baby-cheetah.jpg" alt="baby cheetah">
-		<p>League yo-ho-ho aft Chain Shot to go on account chase guns lanyard clap of thunder Jack Tar Shiver me timbers. Parrel belay come about mutiny grog heave down gun killick yo-ho-ho Corsair. Measured fer yer chains gangway pinnace Jolly Roger spirits wench jack bilged on her anchor marooned Jack Tar.</p>
-	</div>
-</body>
-<script type="text/javascript" src="js/jquery-3.0.0.min.js"></script>
-</html>
diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/question.md b/lessons/L5/problem-set/04-text-align-with-cheetahs/question.md
deleted file mode 100644
index 947a2bb34..000000000
--- a/lessons/L5/problem-set/04-text-align-with-cheetahs/question.md
+++ /dev/null
@@ -1,51 +0,0 @@
-In this quiz, you'll be [aligning text](https://developer.mozilla.org/en-US/docs/Web/CSS/text-align) to make [this site](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/index.html) look [like this](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/final.jpg). Notice the changes to the text alignment.
-
-You'll also get to see the `float` [property](https://developer.mozilla.org/en-US/docs/Web/CSS/float) in action. I know that doesn't sound incredibly exciting, so I've included a cute image of a baby cheetah in the quiz and some really great information about `text-align` to make up for it!
-
-![baby cheetah picture](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/baby-cheetah.jpg)
-
-_Aww_ 😍 _! Look at that baby cheetah!_
-
-## Text-Align
-
-You've probably aligned text before in programs like Microsoft Word or Google Docs, or used tools like a WYSIWYG editor. On the web, [aligning text](https://developer.mozilla.org/en-US/docs/Web/CSS/text-align) works about the same and includes the same values for alignment that you would come to expect: left, right, center, and justified (text spreads out to take up the full width of the container).
-
-![wysiwyg editor picture](http://udacity.github.io/fend/lessons/L5/problem-set/04-text-align-with-cheetahs/wysiwyg-editor.png)
-
-_WYSIWYG editor from [TinyMCE](https://www.tinymce.com/). WYSIWYG stands for "What You See Is What You Get."_
-
-Essentially, the `text-align` property controls how content inside a block element is horizontally aligned. This mostly includes text, but can apply to other elements like images that use the property `inline-block` (we'll cover `inline-block` later in this problem set).
-
-### Direction
-
-Fact: not all languages are read from left-to-right. Languages like Arabic and Hebrew read from right-to-left. The point is that the order, or **direction**, that text is read varies depending on the language. And on the web, there are some clever ways to address this and leverage it when using the `text-align` property.
-
-By default, the direction of text is set to left-to-right. This shouldn't come as a surprise because the majority of world languages read from left-to-right... but what if you want to the change the direction? Also, what do you do if you want to use `text-align` for text that reads from right-to-left? Well, you have a couple of options.
-
-First, you can set an entire HTML document's direction by passing the attribute `dir` to the HTML. For example,
-
-```html
-<!DOCTYPE html>
-<!-- sets direction to right-to-left and language to Arabic -->
-<html dir="rtl" lang="ar">
-<head>
-  <!-- ... -->
-</head>
-<!-- ... -->
-```
-
-Alternatively, you can use the `direction` CSS property to specify `ltr` or `rtl`.
-
-### Start, End, and Match-Parent
-
-Second, the `text-align` property also supports three other values: `start`, `end`, and `match-parent`. Unlike `left` and `right`, these values leverage direction to help with language support.
-
-- `start`: works the same as `left` if direction is left-to-right and `right` if direction is right-to-left
-- `end`: works the same as `right` if direction is left-to-right and `left` if direction is right-to-left
-- `match-parent`: works the same as inherit, but value is determined according to the parent's direction
-
----
-
-### Image Credit
-
-- 'Baby Cheetah' by [Frontierofficial](https://www.flickr.com/photos/frontierofficial/) via Flickr, Creative Commons.
\ No newline at end of file
diff --git a/lessons/L5/problem-set/04-text-align-with-cheetahs/tests.json b/lessons/L5/problem-set/04-text-align-with-cheetahs/tests.json
deleted file mode 100644
index 24d8c5e3f..000000000
--- a/lessons/L5/problem-set/04-text-align-with-cheetahs/tests.json
+++ /dev/null
@@ -1,61 +0,0 @@
-[{
-  "name": "Text-align with Cheetahs",
-  "code": "daaawwwLOOKatTHEbabyCHEETAH",
-  "tests": [
-    {
-      "description": ".one's text is aligned correctly",
-      "definition": {
-        "nodes": ".one",
-        "cssProperty": "textAlign",
-        "equals": "left"
-      }
-    },
-    {
-      "description": ".two's text is aligned correctly",
-      "definition": {
-        "nodes": ".two",
-        "cssProperty": "textAlign",
-        "equals": "center"
-      }
-    },
-    {
-      "description": ".three's text is aligned correctly",
-      "definition": {
-        "nodes": ".three",
-        "cssProperty": "textAlign",
-        "equals": "right"
-      }
-    },
-    {
-      "description": ".four's text is aligned correctly",
-      "definition": {
-        "nodes": ".four",
-        "cssProperty": "textAlign",
-        "equals": "justify"
-      }
-    },
-    {
-      "description": ".five's text is aligned correctly",
-      "definition": {
-        "nodes": ".five",
-        "cssProperty": "textAlign",
-        "equals": ["end", "right"]
-      }
-    },
-    {
-      "description": "The img in .five is floating to the right",
-      "definition": {
-        "nodes": ".floated-image",
-        "cssProperty": "float",
-        "equals": "right"
-      }
-    },
-    {
-      "description": "The img in .five has the correct left padding",
-      "definition": {
-        "waitForEvent": "custom-event-1",
-        "exists": true
-      }
-    }
-  ]
-}]
\ No newline at end of file
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diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/answer.md b/lessons/L5/problem-set/05-fun-with-vertical-align/answer.md
deleted file mode 100644
index 05e0977ad..000000000
--- a/lessons/L5/problem-set/05-fun-with-vertical-align/answer.md
+++ /dev/null
@@ -1,47 +0,0 @@
-Here's each answer one-by-one:
-
-### Pythagorean Theorem
-
-In order to fix the formula for the Pythagorean Theorem, you needed to add the following line of CSS to superscript the exponents.
-
-```css
-.exponent {
-  vertical-align: super;
-}
-```
-
-This fixes the equation to read `a² + b² = c²`. Next time you need to calculate the side of a right triangle, you'll be ready!
-
-### Chemical Equation for Ammonia
-
-Ammonia is a chemical compound that is commonly used in household cleaners, and for this problem you needed to balance its chemical equation... well sort of, but not in the traditional sense.
-
-![household cleaners](http://udacity.github.io/fend/lessons/L5/problem-set/05-fun-with-vertical-align/spray-bottles.jpg)
-
-Anyway, to fix this equation required adding this CSS to the class `.subscript` .
-
-```css
-.subscript {
-  vertical-align: sub;
-}
-```
-
-### Company Profile
-
-Hey, who's that? That's just me playing slow-pitch softball 😎 !
-
-![james playing slow-pitch softball](http://udacity.github.io/fend/lessons/L5/problem-set/05-fun-with-vertical-align/james-answer.png)
-
-To pass this test, you needed to find the `<div>` with the `.profile-details` class and add `vertical-align: top` . But aren't `<div>`s block elements? Yes, but this `<div>` was displayed as `inline-block` which allowed it to be vertically aligned next to the image.
-
-### Pangram with Images
-
-If you're wondering what a **pangram** is, it's a sentence or verse that contains all the letters of the alphabet. A common pangram example is _"The quick brown fox jumps over the lazy dog"_.
-
-![pangram example](http://udacity.github.io/fend/lessons/L5/problem-set/05-fun-with-vertical-align/pangram-answer.png)
-
-To fix this example required adding `vertical-align: middle` to both the fox and dog images. This might have seemed confusing at first, but really you're adjusting where the image is aligned relative to the text.
-
----
-
-- 'Household Cleaners' by [PublicDomainPictures](https://pixabay.com/en/users/PublicDomainPictures-14/) via Pixabay, Creative Commons.
\ No newline at end of file
diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/css/original.css b/lessons/L5/problem-set/05-fun-with-vertical-align/css/original.css
deleted file mode 100644
index 856ec51e7..000000000
--- a/lessons/L5/problem-set/05-fun-with-vertical-align/css/original.css
+++ /dev/null
@@ -1,54 +0,0 @@
-html, body {
-	font-size: 16px;
-	line-height: normal;
-	font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
-}
-img {
-	vertical-align: baseline;
-}
-p {
-	margin: 1em 0;
-}
-.h1, .h2, .h3, .h4, .h5, .h6, h1, h2, h3, h4, h5, h6 {
-	line-height: 1.42857143;
-}
-.container {
-	font-size: 14px;
-	line-height: 1.42857143;
-	color: #333;
-	background-color: #fff;
-	margin: 0 auto;
-	padding: 0;
-}
-.panel-title {
-	font-weight: bold;
-}
-.exponent {
-	vertical-align: super;
-}
-.subscript {
-	vertical-align: sub;
-}
-.profile-pic {
-	padding-right: 0.5em;
-}
-.profile-details {
-	display: inline-block;
-	vertical-align: top;
-}
-.profile-name, .profile-role {
-	margin: 0;
-}
-.fox, .dog {
-	vertical-align: middle;
-}
-@media (min-width: 800px) {
-  .container {
-	max-width: 800px;
-  }
-}
-@media (max-width: 800px) {
-  .container {
-	max-width: 100%;
-  }
-}
diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/css/styles.css b/lessons/L5/problem-set/05-fun-with-vertical-align/css/styles.css
deleted file mode 100644
index d36cc8db0..000000000
--- a/lessons/L5/problem-set/05-fun-with-vertical-align/css/styles.css
+++ /dev/null
@@ -1,56 +0,0 @@
-html, body {
-    font-size: 16px;
-    line-height: normal;
-    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
-}
-img {
-    vertical-align: baseline;
-}
-p {
-    margin: 1em 0;
-}
-.h1, .h2, .h3, .h4, .h5, .h6, h1, h2, h3, h4, h5, h6 {
-    line-height: 1.42857143;
-}
-.container {
-    font-size: 14px;
-    line-height: 1.42857143;
-    color: #333;
-    background-color: #fff;
-    margin: 0 auto;
-    padding: 0;
-}
-.panel-title {
-    font-weight: bold; 
-}
-.profile-pic {
-    padding-right: 0.5em;
-}
-.profile-details {
-    display: inline-block;
-}
-.profile-name, .profile-role {
-    margin: 0;
-}
-.exponent {
-
-}
-.subscript {
-
-}
-.profile-details {
-
-}
-.fox, .dog {
-
-}
-@media (min-width: 800px) {
-  .container {
-    max-width: 800px;
-  }
-}
-@media (max-width: 800px) {
-  .container {
-    max-width: 100%;
-  }
-}
\ No newline at end of file
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deleted file mode 100644
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diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/index.html b/lessons/L5/problem-set/05-fun-with-vertical-align/index.html
deleted file mode 100644
index bd29f6c42..000000000
--- a/lessons/L5/problem-set/05-fun-with-vertical-align/index.html
+++ /dev/null
@@ -1,59 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Fun with Vertical-align</title>
-	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
-	<link href="css/styles.css" rel="stylesheet">
-	<meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-	<div class="container">
-		<p>
-			<em><a href="mockup.png" target="_blank">Here's the mockup for reference.</a> Note: you must use the <code>vertical-align</code> CSS property to solve this quiz. Semantic elements will not pass.</em>
-		</p>
-		<!-- Pythagorean Theorem -->
-		<div class="panel panel-default">
-			<div class="panel-heading">
-				<h3 class="panel-title">Pythagorean Theorem</h3>
-			</div>
-			<div class="panel-body">
-				<p>a<span class="exponent">2</span> + b<span class="exponent">2</span> = c<span class="exponent">2</span></p>
-				<p><em>Not familiar with the Pythagorean theorem? <a href="https://en.wikipedia.org/wiki/Pythagorean_theorem" target="_blank">Take a look at this Wikipedia article</a> to see how this equation should look.</em></p>
-			</div>
-		</div>
-		<!-- Chemical Equation for Ammonia -->
-		<div class="panel panel-default">
-			<div class="panel-heading">
-				<h3 class="panel-title">Chemical Equation for Ammonia</h3>
-			</div>
-			<div class="panel-body">
-				<p>H<span class="subscript">2</span> + 3H<span class="subscript">2</span> → 2NH<span class="subscript">3</span></p>
-				<p><em>Not familiar with chemical equations? <a href="https://en.wikipedia.org/wiki/Chemical_equation#Ionic_equations" target="_blank">Take a look at the examples here.</a> (Hint: in the examples, the numbers that immediately follow letters should be subscripts.)</em></p>
-			</div>
-		</div>
-		<!-- Company Profile -->
-		<div class="panel panel-default">
-			<div class="panel-heading">
-				<h3 class="panel-title">Company Profile</h3>
-			</div>
-			<div class="panel-body">
-				<img class="profile-pic" src="img/james.jpg" alt="James playing slow-pitch softball">
-				<div class="profile-details">
-					<h3 class="profile-name">James Parkes</h3>
-					<p class="profile-role">Course Developer</p>
-				</div>
-			</div>
-		</div>
-		<!-- Pangram with Images -->
-		<div class="panel panel-default">
-			<div class="panel-heading">
-				<h3 class="panel-title">Pangram with Images</h3>
-			</div>
-			<div class="panel-body">
-				<p>The <img class="fox" src="img/quick-brown-fox.jpg" alt="quick brown fox"> jumps over the <img class="dog" src="img/lazy-dog.jpg" alt="lazy dog"></p>
-			</div>
-		</div>
-	</div>
-</body>
-</html>
diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/instructions.md b/lessons/L5/problem-set/05-fun-with-vertical-align/instructions.md
deleted file mode 100644
index 05be31fc4..000000000
--- a/lessons/L5/problem-set/05-fun-with-vertical-align/instructions.md
+++ /dev/null
@@ -1,10 +0,0 @@
-### How to Complete this Quiz
-
-1. Open [this webpage](http://udacity.github.io/fend/lessons/L5/problem-set/05-fun-with-vertical-align/index.html) with Chrome.
-2. Turn on the [Udacity Feedback Chrome Extension](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345403/modules/742847927175460/lessons/7323812069/concepts/73256617910923).
-3. Use Developer Tools to make the page look [like this](http://udacity.github.io/fend/lessons/L5/problem-set/05-fun-with-vertical-align/mockup.png) to pass all the tests.
-4. Copy and paste the code that appears into the next page to finish!
-
-<br>
-
-Good luck!
\ No newline at end of file
diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/james-answer.png b/lessons/L5/problem-set/05-fun-with-vertical-align/james-answer.png
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diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/original.html b/lessons/L5/problem-set/05-fun-with-vertical-align/original.html
deleted file mode 100644
index 38e3bd2b8..000000000
--- a/lessons/L5/problem-set/05-fun-with-vertical-align/original.html
+++ /dev/null
@@ -1,59 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Fun with Vertical-align</title>
-	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">
-	<link href="css/original.css" rel="stylesheet">
-	<meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-	<div class="container">
-		<p>
-			<em><a href="mockup.jpg" target="_blank">Here's the mockup for reference.</a> Note: you must use the <code>vertical-align</code> CSS property to solve this quiz. Semantic elements will not pass.</em>
-		</p>
-		<!-- Pythagorean Theorem -->
-		<div class="panel panel-default">
-			<div class="panel-heading">
-				<h3 class="panel-title">Pythagorean Theorem</h3>
-			</div>
-			<div class="panel-body">
-				<p>a<span class="exponent">2</span> + b<span class="exponent">2</span> = c<span class="exponent">2</span></p>
-				<p><em>Not familiar with the Pythagorean theorem? <a href="https://en.wikipedia.org/wiki/Pythagorean_theorem" target="_blank">Take a look at this Wikipedia article</a> to see how this equation should look.</em></p>
-			</div>
-		</div>
-		<!-- Chemical Equation for Ammonia -->
-		<div class="panel panel-default">
-			<div class="panel-heading">
-				<h3 class="panel-title">Chemical Equation for Ammonia</h3>
-			</div>
-			<div class="panel-body">
-				<p>H<span class="subscript">2</span> + 3H<span class="subscript">2</span> → 2NH<span class="subscript">3</span></p>
-				<p><em>Not familiar with chemical equations? <a href="https://en.wikipedia.org/wiki/Chemical_equation#Ionic_equations" target="_blank">Take a look at the examples here.</a> (Hint: in the examples, the numbers that immediately follow letters should be subscripts.)</em></p>
-			</div>
-		</div>
-		<!-- Company Profile -->
-		<div class="panel panel-default">
-			<div class="panel-heading">
-				<h3 class="panel-title">Company Profile</h3>
-			</div>
-			<div class="panel-body">
-				<img class="profile-pic" src="img/james.jpg" alt="James playing slow-pitch softball">
-				<div class="profile-details">
-					<h3 class="profile-name">James Parkes</h3>
-					<p class="profile-role">Course Developer</p>
-				</div>
-			</div>
-		</div>
-		<!-- Pangram with Images -->
-		<div class="panel panel-default">
-			<div class="panel-heading">
-				<h3 class="panel-title">Pangram with Images</h3>
-			</div>
-			<div class="panel-body">
-				<p>The <img class="fox" src="img/quick-brown-fox.jpg" alt="quick brown fox"> jumps over the <img class="dog" src="img/lazy-dog.jpg" alt="lazy dog"></p>
-			</div>
-		</div>
-	</div>
-</body>
-</html>
diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/pangram-answer.png b/lessons/L5/problem-set/05-fun-with-vertical-align/pangram-answer.png
deleted file mode 100644
index 1b3ccd42b..000000000
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diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/question.md b/lessons/L5/problem-set/05-fun-with-vertical-align/question.md
deleted file mode 100644
index 11d30468f..000000000
--- a/lessons/L5/problem-set/05-fun-with-vertical-align/question.md
+++ /dev/null
@@ -1,27 +0,0 @@
-Now that we've covered horizontal alignment, it's time to look at vertical alignment.
-
-## Vertical-Align
-
-The `vertical-align` [property](https://developer.mozilla.org/en-US/docs/Web/CSS/vertical-align) controls how elements vertically sit next to each other on the same line. With that said, you can also use `vertical-align` to vertically align content inside table-cells.
-
-![vertical-align example in table cells](http://udacity.github.io/fend/lessons/L5/problem-set/05-fun-with-vertical-align/vertical-align-table-cells.png)
-
-_Examples of `vertical-align` with table-cells._
-
-The important thing here is `vertical-align` only works on **inline elements** (or [inline-block](https://css-tricks.com/almanac/properties/d/display/#inline-block)) and **table-cells**.
-
-By default, all inline elements start `baseline` with the baseline of its parent. You can think of the baseline as the imaginary line at the bottom of the "line".
-
-![inline elements vertically aligned on a line](http://udacity.github.io/fend/lessons/L5/problem-set/05-fun-with-vertical-align/vertical-align-pic.jpg)
-
-Valid values for `vertical-align` include `top`, `bottom`, and `middle`, which work exactly like you'd expect, `super` and `sub` which can be used to superscript and subscript inline elements (hence their names), or you can use length values (e.g. px, %, em, rem, etc.) to specify a length above the baseline of its parent.
-
-In this quiz, you'll work with the `vertical-align` property to align inline elements to match [this mockup](http://udacity.github.io/fend/lessons/L5/problem-set/05-fun-with-vertical-align/mockup.png). Along the way, you might even recall on a thing or two from your Algebra, Chemistry, or Grammer classes.
-
----
-
-### Image Credit
-
-- 'Inline Elements' by Louis Lazaris via [impressivewebs.com](https://www.impressivewebs.com/css-vertical-align/), Creative Commons.
-- 'European Red Fox' by [Juan lacruz](https://commons.wikimedia.org/wiki/User:Juan_lacruz) via Wikipedia, Creative Commons.
-- 'Lazy Dog' by [Andreas Almstedt](https://pixabay.com/en/users/Almi-205352/) via Pixabay, Creative Commons.
\ No newline at end of file
diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/spray-bottles.jpg b/lessons/L5/problem-set/05-fun-with-vertical-align/spray-bottles.jpg
deleted file mode 100644
index 9345167e5..000000000
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diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/tests.json b/lessons/L5/problem-set/05-fun-with-vertical-align/tests.json
deleted file mode 100644
index 06d7e86aa..000000000
--- a/lessons/L5/problem-set/05-fun-with-vertical-align/tests.json
+++ /dev/null
@@ -1,38 +0,0 @@
-[{
-  "name": "Fun with Vertical-align",
-  "code": "topMIDDLEbottomWHATsup",
-  "tests": [
-    {
-      "description": "Align the exponents to complete the Pythagorean Theorem",
-      "definition": {
-        "nodes": ".exponent",
-        "cssProperty": "verticalAlign",
-        "equals": "super"
-      }
-    },
-    {
-      "description": "Align the subscripts to balance the chemical equation",
-      "definition": {
-        "nodes": ".subscript",
-        "cssProperty": "verticalAlign",
-        "equals": "sub"
-      }
-    },
-    {
-      "description": "Align the profile details for James' company profile",
-      "definition": {
-        "nodes": ".profile-details",
-        "cssProperty": "verticalAlign",
-        "equals": "top"
-      }
-    },
-    {
-      "description": "Align the images in the pangram",
-      "definition": {
-        "nodes": ".fox, .dog",
-        "cssProperty": "verticalAlign",
-        "equals": "middle"
-      }
-    }
-  ]
-}]
\ No newline at end of file
diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/vertical-align-pic.jpg b/lessons/L5/problem-set/05-fun-with-vertical-align/vertical-align-pic.jpg
deleted file mode 100644
index 627dd8140..000000000
Binary files a/lessons/L5/problem-set/05-fun-with-vertical-align/vertical-align-pic.jpg and /dev/null differ
diff --git a/lessons/L5/problem-set/05-fun-with-vertical-align/vertical-align-table-cells.png b/lessons/L5/problem-set/05-fun-with-vertical-align/vertical-align-table-cells.png
deleted file mode 100644
index 31fc5b44c..000000000
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diff --git a/lessons/L5/problem-set/06-playing-with-line-height/answer.md b/lessons/L5/problem-set/06-playing-with-line-height/answer.md
deleted file mode 100644
index e452ac6e5..000000000
--- a/lessons/L5/problem-set/06-playing-with-line-height/answer.md
+++ /dev/null
@@ -1,29 +0,0 @@
-Awesome job! You could have completed the tests a couple of different ways, so I've listed a few different answers below.
-
-```css
-.one {
-  line-height: 22px;
-  /* line-height: 1;     <- another way of writing it */
-  /* line-height: 100%;  <- another way of writing it */
-}
-
-.two {
-  line-height: 2;
-  /* line-height: 44px;  <- another way of writing it */
-  /* line-height: 200%;  <- another way of writing it */
-}
-
-.three {
-  line-height: 300%;
-  /* line-height: 66px;  <- another way of writing it */
-  /* line-height: 3;     <- another way of writing it */
-}
-```
-
-### Cool CSS Effects
-
-...and what about those effects! Pretty cool, right?
-
-![line-height effects](http://udacity.github.io/fend/lessons/L5/problem-set/06-playing-with-line-height/line-height-effects.png)
-
-Well if you didn't know already, CSS is pretty awesome! Those effects were actually created using `line-height` and a combination of `background-image` , `text-fill-color` , and `background-clip` . If you want to learn more about how I created those effects, check out [this post](https://css-tricks.com/fun-line-height/) by css-tricks.com.
\ No newline at end of file
diff --git a/lessons/L5/problem-set/06-playing-with-line-height/css/original.css b/lessons/L5/problem-set/06-playing-with-line-height/css/original.css
deleted file mode 100644
index 826af263d..000000000
--- a/lessons/L5/problem-set/06-playing-with-line-height/css/original.css
+++ /dev/null
@@ -1,62 +0,0 @@
-.container {
-    font-family: Arial, Helvetica, sans-serif;
-    font-size: 22px;
-    font-weight: bold;
-    text-align: center;
-    width: 750px;
-    padding: 1em 0;
-    margin: 0 auto 1em;
-}
-.one {
-    line-height: 22px;
-    -webkit-background-clip: text;
-    -webkit-text-fill-color: transparent;
-    background-image: linear-gradient(
-        to bottom,
-        #EA353D,
-        #EA353D 22px,
-        #F3863F 22px,
-        #F3863F 44px,
-        #FEF03A 44px,
-        #FEF03A 66px,
-        #18A75C 66px,
-        #18A75C 88px,
-        #1DB0EC 88px,
-        #1DB0EC 110px,
-        #3F4393 110px,
-        #3F4393 132px,
-        #805CA2 132px,
-        #805CA2
-    );
-}
-.two {
-    line-height: 2;
-    -webkit-background-clip: text;
-    -webkit-text-fill-color: transparent;
-    background-image: linear-gradient(
-        to bottom,
-        rgba(255, 255, 255, 1),
-        rgba(255, 255, 255, 1) 44px,
-        rgba(255, 255, 255, 0.8) 44px,
-        rgba(255, 255, 255, 0.8) 88px,
-        rgba(255, 255, 255, 0.6) 88px,
-        rgba(255, 255, 255, 0.6) 132px,
-        rgba(255, 255, 255, 0.4) 132px,
-        rgba(255, 255, 255, 0.4) 176px,
-        rgba(255, 255, 255, 0.2) 176px,
-        rgba(255, 255, 255, 0.2) 220px,
-        rgba(255, 255, 255, 0) 220px,
-        rgba(255, 255, 255, 0)
-    );
-}
-.three {
-    line-height: 300%;
-    color: #6b849d;
-    background-image: repeating-linear-gradient(
-        to bottom,
-        rgba(255, 255, 255, 0)   0,
-        rgba(255, 255, 255, 0)   65px,
-        rgba(255, 255, 255, 0.4) 65px,
-        rgba(255, 255, 255, 0.4) 66px
-    );
-}
\ No newline at end of file
diff --git a/lessons/L5/problem-set/06-playing-with-line-height/css/styles.css b/lessons/L5/problem-set/06-playing-with-line-height/css/styles.css
deleted file mode 100644
index 09011713b..000000000
--- a/lessons/L5/problem-set/06-playing-with-line-height/css/styles.css
+++ /dev/null
@@ -1,21 +0,0 @@
-.container {
-    font-family: Arial, Helvetica, sans-serif;
-    font-size: 22px;
-    font-weight: bold;
-    text-align: center;
-    width: 750px;
-    padding: 1em 0;
-    margin: 0 auto 1em;
-}
-
-.one {
-  /* styles go here */
-}
-
-.two {
-  /* styles go here */
-}
-
-.three {
-  /* styles go here */
-}
\ No newline at end of file
diff --git a/lessons/L5/problem-set/06-playing-with-line-height/duh-meme.gif b/lessons/L5/problem-set/06-playing-with-line-height/duh-meme.gif
deleted file mode 100644
index 6ff3b3433..000000000
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diff --git a/lessons/L5/problem-set/06-playing-with-line-height/image-form.jpeg b/lessons/L5/problem-set/06-playing-with-line-height/image-form.jpeg
deleted file mode 100644
index 47716bfd8..000000000
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diff --git a/lessons/L5/problem-set/06-playing-with-line-height/index.html b/lessons/L5/problem-set/06-playing-with-line-height/index.html
deleted file mode 100644
index b531aae90..000000000
--- a/lessons/L5/problem-set/06-playing-with-line-height/index.html
+++ /dev/null
@@ -1,28 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="utf-8">
-    <title>Playing with Line-Height</title>
-    <link href="css/styles.css" rel="stylesheet">
-    <meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-    <div class="container">
-        <div class="one">
-            <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do</p>
-        </div>
-    </div>
-    <div class="container">
-        <div class="two">
-            <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do</p>
-        </div>
-    </div>
-    <div class="container">
-        <div class="three">
-            <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do</p>
-        </div>
-    </div>
-</body>
-<script type="text/javascript" src="js/jquery-3.0.0.min.js"></script>
-<script type="text/javascript" src="js/main.js"></script>
-</html>
diff --git a/lessons/L5/problem-set/06-playing-with-line-height/instructions.md b/lessons/L5/problem-set/06-playing-with-line-height/instructions.md
deleted file mode 100644
index 6c982e799..000000000
--- a/lessons/L5/problem-set/06-playing-with-line-height/instructions.md
+++ /dev/null
@@ -1,10 +0,0 @@
-### How to Complete this Quiz
-
-1. Open [this webpage](http://udacity.github.io/fend/lessons/L5/problem-set/06-playing-with-line-height/index.html) with Chrome.
-2. Turn on the [Udacity Feedback Chrome Extension](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345403/modules/742847927175460/lessons/7323812069/concepts/73256617910923).
-3. Use Developer Tools to pass all the tests.
-4. Copy and paste the code that appears into the next page to finish!
-
-<br>
-
-Good luck!
\ No newline at end of file
diff --git a/lessons/L5/problem-set/06-playing-with-line-height/js/jquery-3.0.0.min.js b/lessons/L5/problem-set/06-playing-with-line-height/js/jquery-3.0.0.min.js
deleted file mode 100644
index 62d410d95..000000000
--- a/lessons/L5/problem-set/06-playing-with-line-height/js/jquery-3.0.0.min.js
+++ /dev/null
@@ -1,4 +0,0 @@
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diff --git a/lessons/L5/problem-set/06-playing-with-line-height/js/main.js b/lessons/L5/problem-set/06-playing-with-line-height/js/main.js
deleted file mode 100644
index c9af66e07..000000000
--- a/lessons/L5/problem-set/06-playing-with-line-height/js/main.js
+++ /dev/null
@@ -1,38 +0,0 @@
-$(document).ready(function() {
-
-	window.addEventListener("ud-test-pass", function(e) {
-		var testDescription = e.detail;
-
-		if(testDescription.includes(".one")) {
-			addFirstStyle();
-		}
-		if(testDescription.includes(".two")) {
-			addSecondStyle();
-		}
-		if(testDescription.includes(".three")) {
-			addThirdStyle();
-		}
-	});
-
-});
-
-function addFirstStyle() {
-	$(".one").parent().css("background", "#CCC");
-	$(".one").css("-webkit-background-clip", "text");
-	$(".one").css("-webkit-text-fill-color", "transparent");
-	$(".one").css("background-image", "linear-gradient(to bottom,#EA353D,#EA353D 22px,#F3863F 22px,#F3863F 44px,#FEF03A 44px,#FEF03A 66px,#18A75C 66px,#18A75C 88px,#1DB0EC 88px,#1DB0EC 110px,#3F4393 110px,#3F4393 132px,#805CA2 132px,#805CA2)");
-}
-
-function addSecondStyle() {
-	$(".two").parent().css("background", "#000");
-	$(".two").css("-webkit-background-clip", "text");
-	$(".two").css("-webkit-text-fill-color", "transparent");
-	$(".two").css("background-image", "linear-gradient(to bottom,rgba(255, 255, 255, 1),rgba(255, 255, 255, 1) 44px,rgba(255, 255, 255, 0.8) 44px,rgba(255, 255, 255, 0.8) 88px,rgba(255, 255, 255, 0.6) 88px,rgba(255, 255, 255, 0.6) 132px,rgba(255, 255, 255, 0.4) 132px,rgba(255, 255, 255, 0.4) 176px,rgba(255, 255, 255, 0.2) 176px,rgba(255, 255, 255, 0.2) 220px,rgba(255, 255, 255, 0) 220px,rgba(255, 255, 255, 0))");
-}
-
-function addThirdStyle() {
-	$(".three").parent().css("background", "#082838");
-	$(".three").parent().css("padding", "0");
-	$(".three").parent().css("color", "#6b849d");
-	$(".three").css("background-image", "repeating-linear-gradient(to bottom,rgba(255, 255, 255, 0) 0,rgba(255, 255, 255, 0)   65px,rgba(255, 255, 255, 0.4) 65px,rgba(255, 255, 255, 0.4) 66px)");
-}
\ No newline at end of file
diff --git a/lessons/L5/problem-set/06-playing-with-line-height/line-height-effects.png b/lessons/L5/problem-set/06-playing-with-line-height/line-height-effects.png
deleted file mode 100644
index 8623f037c..000000000
Binary files a/lessons/L5/problem-set/06-playing-with-line-height/line-height-effects.png and /dev/null differ
diff --git a/lessons/L5/problem-set/06-playing-with-line-height/line-spacing.png b/lessons/L5/problem-set/06-playing-with-line-height/line-spacing.png
deleted file mode 100644
index 8d49a2e3a..000000000
Binary files a/lessons/L5/problem-set/06-playing-with-line-height/line-spacing.png and /dev/null differ
diff --git a/lessons/L5/problem-set/06-playing-with-line-height/original.html b/lessons/L5/problem-set/06-playing-with-line-height/original.html
deleted file mode 100644
index a84fb2042..000000000
--- a/lessons/L5/problem-set/06-playing-with-line-height/original.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="utf-8">
-    <title>Playing with Line-Height</title>
-    <link href="css/original.css" rel="stylesheet">
-    <meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-    <div class="container" style="background:#ccc;">
-        <div class="one">
-            <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do</p>
-        </div>
-    </div>
-    <div class="container" style="background:#000;">
-        <div class="two">
-            <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do</p>
-        </div>
-    </div>
-    <div class="container" style="background:#082838; padding: 0">
-        <div class="three">
-            <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do<br>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do</p>
-        </div>
-    </div>
-</body>
-</html>
diff --git a/lessons/L5/problem-set/06-playing-with-line-height/question.md b/lessons/L5/problem-set/06-playing-with-line-height/question.md
deleted file mode 100644
index c59f9508d..000000000
--- a/lessons/L5/problem-set/06-playing-with-line-height/question.md
+++ /dev/null
@@ -1,23 +0,0 @@
-The `line-height` [property](https://developer.mozilla.org/en-US/docs/Web/CSS/line-height) controls the height of lines, obviously 😉 .
-
-![duh meme](http://udacity.github.io/fend/lessons/L5/problem-set/06-playing-with-line-height/duh-meme.gif)
-
-## Line-Height
-
-More specifically, `line-height` defines the minimum height of line boxes for inline elements. You've probably done something very similar to this if you've used a word processor and set the line spacing for a document to single-spaced, double-spaced, and so on.
-
-![setting line spacing in Microsoft Word](http://udacity.github.io/fend/lessons/L5/problem-set/06-playing-with-line-height/line-spacing.png)
-
-_Example of setting line-spacing, similar to `line-height`, in Microsoft Word 2016._
-
-You can specify `line-height` three different ways, by using a (1) number, (2) length, or (3) percentage. By default, `line-height` is set to `normal` which is [rougly 1.2](https://developer.mozilla.org/en-US/docs/Web/CSS/line-height#Values) (based on the elememt's `font-family`) multiplied by the element's `font-size`.
-
-For example, if your element's `font-size` is set to `16px`, then by default its `line-height` is rougly `19.2px` when set to `normal`. You could achieve the same result by writing `line-height` as: 
-
-1. `line-height: 1.2;`
-2. `line-height: 19.2px;`
-3. `line-height: 120%;`
-
-_Here's three different ways to express `line-height`. These are all equivalent, assuming the element's `font-size` is set to `16px` (1.2 multiplied by 16px = 19.2px)._
-
-In this quiz, you'll play around with using different values for `line-height`. Also, when you pass each test, you will be rewarded with a cool CSS effect. Each effect leverages `line-height` to generate some pretty interesting results! Are you ready to get started?
\ No newline at end of file
diff --git a/lessons/L5/problem-set/06-playing-with-line-height/tests.json b/lessons/L5/problem-set/06-playing-with-line-height/tests.json
deleted file mode 100644
index 200c032cd..000000000
--- a/lessons/L5/problem-set/06-playing-with-line-height/tests.json
+++ /dev/null
@@ -1,30 +0,0 @@
-[{
-  "name": "Playing with Line-height",
-  "code": "_LiNe-HeIgHt!",
-  "tests": [
-    {
-      "description": "Set the line-height to 22px for class .one",
-      "definition": {
-        "nodes": ".one",
-        "cssProperty": "lineHeight",
-        "equals": "22px"
-      }
-    },
-    {
-      "description": "Increase the line-height of class .two by a factor of 2",
-      "definition": {
-        "nodes": ".two",
-        "cssProperty": "lineHeight",
-        "equals": "44px"
-      }
-    },
-    {
-      "description": "Change the line-height of class .three to 300%",
-      "definition": {
-        "nodes": ".three",
-        "cssProperty": "lineHeight",
-        "equals": "66px"
-      }
-    }
-  ]
-}]
\ No newline at end of file
diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/answer.md b/lessons/L5/problem-set/07-making-peach-ice-cream/answer.md
deleted file mode 100644
index 2798ba99f..000000000
--- a/lessons/L5/problem-set/07-making-peach-ice-cream/answer.md
+++ /dev/null
@@ -1,35 +0,0 @@
-I'm getting hungry!
-
-Anyway, your answer should have looked like this...
-
-![ice cream solution](http://udacity.github.io/fend/lessons/L5/problem-set/07-making-peach-ice-cream/final.jpg)
-
-If you look at the final result, you can tell that with just a few small tweaks to the CSS, the recipe has started to take shape.
-
-By adjusting the page to use `box-sizing: border-box` , the recipe summary and image both align at the top of the page. However, it's not just `border-box` alone that is helping us achieve this affect, in fact, both the recipe summary and image have a `width` of 50% and use a property called `float` in order to line up side-by-side like seen in solution. In the next lesson, we'll cover `float` and other positioning properties that will allow you to take full control of the layouts on your webpages.
-
-Also, the adjustment to the recipe container's `width`, combined with `margin: 0 auto` , centered the entire recipe in the middle of the "page".
-
-```css
-.recipe {
-  /* ... */
-  width: 800px;
-  margin: 0 auto;
-}
-```
-
-The next three adjustments focused on small aesthetic changes by adding spacing above and below the section titles, as well as using `<em>` to create an _emphasis_ on the recipe's author (Hey, that's me 😎 !). Pay attention to the changes for `padding` and `margin` on the section titles; specifically the `padding`. It was used to add space between the _content_ (the actual title itself) and the `border` that was being drawn underneath it.
-
-![padding bottom animation](http://udacity.github.io/fend/lessons/L5/problem-set/07-making-peach-ice-cream/padding-bottom-ice-cream.gif)
-
-_The padding is added below the content, but between the border._
-
-Finally, the last adjustment was made to the recipe notes. By changing these to `display: inline` , the `width` of the notes were constrained to the content. Therefore, the notes lined up next to each other, rather than one on top of the other.
-
-![recipe notes image](http://udacity.github.io/fend/lessons/L5/problem-set/07-making-peach-ice-cream/recipe-notes.png)
-
-_Can you guess what each icon represents in the recipe notes?_
-
----
-
-**Note: If you try this recipe, tell us about it! Share pictures [in the forums](https://discussions.udacity.com/t/making-peach-ice-cream-let-us-know/173298) and let us know how it matches up with other ice creams you've had. Sidenote, this recipe is all about the peaches. The better the peaches, the better the ice cream!**
\ No newline at end of file
diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/css/original.css b/lessons/L5/problem-set/07-making-peach-ice-cream/css/original.css
deleted file mode 100644
index 0cbf80732..000000000
--- a/lessons/L5/problem-set/07-making-peach-ice-cream/css/original.css
+++ /dev/null
@@ -1,144 +0,0 @@
-/* Global */
-* {
-	box-sizing: border-box;
-}
-
-body {
-	font-family: 'Lato', sans-serif;
-	font-size: 16px;
-	background: url(../img/paper.png) repeat-y;
-	width: 980px;
-	margin: 0;
-}
-
-h1, h2, h3, h4, h5, h6 {
-	font-weight: 300;
-}
-
-/* Helpers */
-.clearfix {
-	clear: both;
-}
-
-/* Big sections of content */
-.section-content {
-	width: 100%;
-}
-
-.section-title {
-	font-size: 32px;
-	line-height: 38px;
-	padding-bottom: 16px;
-	margin-top: 20px;
-	border-bottom: 1px solid #000;
-	border-bottom: 1px solid rgba(0, 0, 0, 0.5);
-}
-
-/* Font Awesome - http://fontawesome.io/ */
-.fa {
-	color: #ccc;
-	color: rgba(0, 0, 0, 0.3);
-	margin-right: 0.3rem;
-	font-size: 2.3em;
-	vertical-align: middle;
-	width: 28px;
-}
-
-/* Recipe */
-.recipe {
-	width: 800px;
-	margin: 0 auto;
-	padding: 0.75rem;
-	line-height: 25px;
-}
-
-.recipe-summary {
-	width: 50%;
-	float: left;
-}
-
-.recipe-title {
-	font-size: 48px;
-	line-height: 1em;
-	margin-bottom: 1rem;
-}
-
-.recipe-author {
-	margin-top: 1.7em
-}
-
-.recipe-notes {
-	margin: 1.5rem 0;
-	padding: 0;
-	list-style-type: none;
-}
-
-.recipe-note {
-	display: inline;
-	font-size: 0.8rem;
-	margin: 1rem 0.3rem 1rem;
-}
-
-.recipe-image {
-	width: 50%;
-	float: right;
-	padding: 1.25rem;
-}
-
-.recipe-image img {
-	width: 100%;
-	border-radius: 20px;
-}
-
-.recipe-ingredients {
-	overflow: hidden;
-	margin-bottom: 32px;
-}
-
-.recipe-ingredients li {
-	width: 50%;
-	float: left;
-}
-
-.recipe-directions {
-	margin: 0;
-	padding: 0;
-	list-style-type: none;
-}
-
-.recipe-directions li {
-	counter-increment: step-counter;
-	margin-bottom: 3rem;
-}
-
-.recipe-directions li span {
-	display: block;
-	margin: -1.6rem 0 0 3.3rem;
-}
-
-.recipe-directions li::before {
-	content: counter(step-counter);
-	font-size: 1.2rem;
-	color: #000;
-	color: rgba(0, 0, 0, 0.5);
-	padding: 7px 13px;
-	border: 1px solid #000;
-	border: 1px solid rgba(0, 0, 0, 0.5);
-	border-radius: 50%;
-}
-
-/* Responsiveness. You'll learn more about this in Responsive Web Design Fundamentals! */
-@media (max-width: 800px) {
-	.recipe,
-	.recipe-image,
-	.recipe-summary {
-		width: 100%;
-	}
-	.recipe-image {
-		float: left;
-		padding: 0;
-	}
-	.recipe-ingredients li {
-		width: 100%;
-	}
-}
\ No newline at end of file
diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/css/styles.css b/lessons/L5/problem-set/07-making-peach-ice-cream/css/styles.css
deleted file mode 100644
index 41cfa0bed..000000000
--- a/lessons/L5/problem-set/07-making-peach-ice-cream/css/styles.css
+++ /dev/null
@@ -1,140 +0,0 @@
-/* Global */
-* {
-	/* you'll want to use this for something... boxy. */
-}
-
-body {
-	font-family: 'Lato', sans-serif;
-	font-size: 16px;
-	background: url(../img/paper.png) repeat-y;
-	width: 980px;
-	margin: 0;
-}
-
-h1, h2, h3, h4, h5, h6 {
-	font-weight: 300;
-}
-
-/* Helpers */
-.clearfix {
-	/* you'll learn more about this later in the positioning lesson */
-	clear: both;
-}
-
-/* Big sections of content */
-.section-content {
-	width: 100%;
-	overflow: hidden;
-}
-
-.section-title {
-	font-size: 32px;
-	line-height: 38px;
-	border-bottom: 1px solid #000;
-	border-bottom: 1px solid rgba(0, 0, 0, 0.5);
-}
-
-/* Font Awesome - http://fontawesome.io/ */
-.fa {
-	color: #ccc;
-	color: rgba(0, 0, 0, 0.3);
-	margin-right: 0.3rem;
-	font-size: 2.3em;
-	vertical-align: middle;
-	width: 28px;
-}
-
-/* Recipe */
-.recipe {
-	padding: 0.75rem;
-	line-height: 25px;
-}
-
-.recipe-summary {
-	width: 50%;
-	float: left;
-}
-
-.recipe-title {
-	font-size: 48px;
-	line-height: 1em;
-	margin-bottom: 1rem;
-}
-
-.recipe-author {
-	margin-top: 1.7em
-}
-
-.recipe-notes {
-	margin: 1.5rem 0;
-	padding: 0;
-	list-style-type: none;
-}
-
-.recipe-note {
-	font-size: 0.8rem;
-	margin: 1rem 0.3rem 1rem;
-}
-
-.recipe-image {
-	width: 50%;
-	float: right;
-	padding: 1.25rem;
-}
-
-.recipe-image img {
-	width: 100%;
-	border-radius: 20px;
-}
-
-.recipe-ingredients {
-	overflow: hidden;
-}
-
-.recipe-ingredients li {
-	width: 50%;
-	float: left;
-}
-
-.recipe-directions {
-	margin: 0;
-	padding: 0;
-	list-style-type: none;
-}
-
-.recipe-directions li {
-	counter-increment: step-counter;
-	margin-bottom: 3rem;
-}
-
-.recipe-directions li span {
-	display: block;
-	margin: -1.6rem 0 0 3.3rem;
-}
-
-.recipe-directions li::before {
-	content: counter(step-counter);
-	font-size: 1.2rem;
-	color: #000;
-	color: rgba(0, 0, 0, 0.5);
-	padding: 7px 13px;
-	border: 1px solid #000;
-	border: 1px solid rgba(0, 0, 0, 0.5);
-	border-radius: 50%;
-}
-
-/* Responsiveness. You'll learn more about this in Responsive Web Design Fundamentals! */
-@media (max-width: 800px) {
-	.recipe,
-	.recipe-image,
-	.recipe-summary {
-		width: 100%;
-	}
-	.recipe-image {
-		float: left;
-		padding: 0;
-	}
-	.recipe-ingredients li {
-		width: 100%;
-	}
-}
\ No newline at end of file
diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/final-annotated.jpg b/lessons/L5/problem-set/07-making-peach-ice-cream/final-annotated.jpg
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index 97ca1d05b..000000000
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diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/ice-cream.png b/lessons/L5/problem-set/07-making-peach-ice-cream/ice-cream.png
deleted file mode 100644
index 19ec7e937..000000000
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diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/img/homemade-peach-ice-cream.png b/lessons/L5/problem-set/07-making-peach-ice-cream/img/homemade-peach-ice-cream.png
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diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/img/paper.png b/lessons/L5/problem-set/07-making-peach-ice-cream/img/paper.png
deleted file mode 100644
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diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/index.html b/lessons/L5/problem-set/07-making-peach-ice-cream/index.html
deleted file mode 100644
index b2234e378..000000000
--- a/lessons/L5/problem-set/07-making-peach-ice-cream/index.html
+++ /dev/null
@@ -1,52 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Making Peach Ice Cream</title>
-	<link href="https://fonts.googleapis.com/css?family=Lato:400,300,700" rel="stylesheet">
-	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.1/css/font-awesome.min.css">
-	<link href="css/styles.css" rel="stylesheet">
-    <meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-	<main class="recipe">
-		<section class="section-content clearfix">
-			<div class="recipe-image">
-				<img src="img/homemade-peach-ice-cream.png" alt="homemade peach ice cream">
-			</div>
-			<div class="recipe-summary">
-				<h2 class="recipe-title">Homemade Peach Ice Cream</h2>
-				<p class="recipe-author">Recipe by: James Parkes</p>
-				<ul class="recipe-notes">
-					<li class="recipe-note"><span><i class="fa fa-cutlery" aria-hidden="true"></i> 20+ servings</span></li>
-					<li class="recipe-note"><span><i class="fa fa-clock-o" aria-hidden="true"></i> 30 min</span></li>
-					<li class="recipe-note"><span><i class="fa fa-cube" aria-hidden="true"></i> 20 min</span></li>
-				</ul>
-			</div>
-		</section>
-		<section class="section-content clearfix">
-			<h3 class="section-title">Ingredients</h3>
-			<ul class="recipe-ingredients">
-				<li>2 (1 lb) bags of ice</li>
-				<li>1 box of rock/ice cream salt</li>
-				<li>15-20 fresh peaches</li>
-				<li>1 egg beater</li>
-				<li>3 cups sugar</li>
-				<li>1 tbsp vanilla flavoring</li>
-				<li>1 tbsp lemon juice</li>
-				<li>1 cup whole milk</li>
-			</ul>
-		</section>
-		<section class="section-content clearfix">
-			<h3 class="section-title">Directions</h3>
-			<ol class="recipe-directions">
-				<li><span>Wash, peel, and cut peaches into medium size pieces.</span></li>
-				<li><span>Add at least 1 tbsp lemon juice to peaches until all peaches are lightly covered. The lemon juice will keep the peaches from browning.</span></li>
-				<li><span>Add peaches, sugar, and milk into the blender/food processor and blend until all ingredients are fully incorporated. The peaches are not meant to be fine pieces, but rather small chunks. Pour the mixture into ice cream container to be used in the freezing process. Repeat this process until all the peaches have been blended. Once this step is complete, at least 3 cups of sugar and 1 cup of milk should be incorporated into the mixture. Make sure that once during the blending process you add the egg beater to the mixture to be incorporated.</span></li>
-				<li><span>To fill the ice cream container to the fill line, continue to add milk. Once the mixture has been topped off to the fill line, add sugar to taste. Almost always, the mixture requires more sugar to be added than the recipe calls.</span></li>
-				<li><span>Place the ice cream container inside the ice cream machine. Start the ice cream machine. While the ice cream machine is running, continue to add layers of ice and rock salt to the sides of the machine to freeze the ice cream so that the entire container is surrounded by ice and rock salt. Once the machine finishes, the ice cream can be served immediately or placed into the freezer to serve later.</span></li>
-			</ol>
-		</section>
-	</main>
-</body>
-</html>
diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/instructions.md b/lessons/L5/problem-set/07-making-peach-ice-cream/instructions.md
deleted file mode 100644
index d49343f09..000000000
--- a/lessons/L5/problem-set/07-making-peach-ice-cream/instructions.md
+++ /dev/null
@@ -1,11 +0,0 @@
-### How to Complete this Quiz
-
-1. Download the peach ice cream recipe site from the resources section or from [here](http://udacity.github.io/fend/lessons/L5/problem-set/07-making-peach-ice-cream/making-peach-ice-cream.zip).
-2. Make your site look like the [final site](http://udacity.github.io/fend/lessons/L5/problem-set/07-making-peach-ice-cream/final.jpg). [The annotated version of the final site](http://udacity.github.io/fend/lessons/L5/problem-set/07-making-peach-ice-cream/final-annotated.jpg) is there to help you out.
-2. Edit the site using your favorite text editor. You'll definitely need to add CSS. There are also a few `<div>`s that you might be able to turn into semantic elements. Experiment and see what what happens.
-3. Turn on the [Udacity Feedback Chrome Extension](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345403/modules/742847927175460/lessons/7323812069/concepts/73256617910923).
-4. When all of the tests pass, you'll get a code. Copy and paste the code that appears into the next page to finish!
-
-<br>
-
-Good luck!
\ No newline at end of file
diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/making-peach-ice-cream.zip b/lessons/L5/problem-set/07-making-peach-ice-cream/making-peach-ice-cream.zip
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diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/margin-auto.gif b/lessons/L5/problem-set/07-making-peach-ice-cream/margin-auto.gif
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diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/mockup.pdf b/lessons/L5/problem-set/07-making-peach-ice-cream/mockup.pdf
deleted file mode 100644
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diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/original.html b/lessons/L5/problem-set/07-making-peach-ice-cream/original.html
deleted file mode 100644
index 3f79d01ce..000000000
--- a/lessons/L5/problem-set/07-making-peach-ice-cream/original.html
+++ /dev/null
@@ -1,52 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Making Peach Ice Cream</title>
-	<link href="https://fonts.googleapis.com/css?family=Lato:400,300,700" rel="stylesheet">
-	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.1/css/font-awesome.min.css">
-	<link href="css/original.css" rel="stylesheet">
-    <meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-	<main class="recipe">
-		<section class="section-content clearfix">
-			<div class="recipe-image">
-				<img src="img/homemade-peach-ice-cream.png" alt="homemade peach ice cream">
-			</div>
-			<div class="recipe-summary">
-				<h2 class="recipe-title">Homemade Peach Ice Cream</h2>
-				<em class="recipe-author">Recipe by: James Parkes</em>
-				<ul class="recipe-notes">
-					<li class="recipe-note"><span><i class="fa fa-cutlery" aria-hidden="true"></i> 20+ servings</span></li>
-					<li class="recipe-note"><span><i class="fa fa-clock-o" aria-hidden="true"></i> 30 min</span></li>
-					<li class="recipe-note"><span><i class="fa fa-cube" aria-hidden="true"></i> 20 min</span></li>
-				</ul>
-			</div>
-		</section>
-		<section class="section-content clearfix">
-			<h3 class="section-title">Ingredients</h3>
-			<ul class="recipe-ingredients">
-				<li>2 (1 lb) bags of ice</li>
-				<li>1 box of rock/ice cream salt</li>
-				<li>15-20 fresh peaches</li>
-				<li>1 egg beater</li>
-				<li>3 cups sugar</li>
-				<li>1 tbsp vanilla flavoring</li>
-				<li>1 tbsp lemon juice</li>
-				<li>1 cup whole milk</li>
-			</ul>
-		</section>
-		<section class="section-content clearfix">
-			<h3 class="section-title">Directions</h3>
-			<ol class="recipe-directions">
-				<li><span>Wash, peel, and cut peaches into medium size pieces.</span></li>
-				<li><span>Add at least 1 tbsp lemon juice to peaches until all peaches are lightly covered. The lemon juice will keep the peaches from browning.</span></li>
-				<li><span>Add peaches, sugar, and milk into the blender/food processor and blend until all ingredients are fully incorporated. The peaches are not meant to be fine pieces, but rather small chunks. Pour the mixture into ice cream container to be used in the freezing process. Repeat this process until all the peaches have been blended. Once this step is complete, at least 3 cups of sugar and 1 cup of milk should be incorporated into the mixture. Make sure that once during the blending process you add the egg beater to the mixture to be incorporated.</span></li>
-				<li><span>To fill the ice cream container to the fill line, continue to add milk. Once the mixture has been topped off to the fill line, add sugar to taste. Almost always, the mixture requires more sugar to be added than the recipe calls.</span></li>
-				<li><span>Place the ice cream container inside the ice cream machine. Start the ice cream machine. While the ice cream machine is running, continue to add layers of ice and rock salt to the sides of the machine to freeze the ice cream so that the entire container is surrounded by ice and rock salt. Once the machine finishes, the ice cream can be served immediately or placed into the freezer to serve later.</span></li>
-			</ol>
-		</section>
-	</main>
-</body>
-</html>
diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/padding-bottom-ice-cream.gif b/lessons/L5/problem-set/07-making-peach-ice-cream/padding-bottom-ice-cream.gif
deleted file mode 100644
index 8851af6cf..000000000
Binary files a/lessons/L5/problem-set/07-making-peach-ice-cream/padding-bottom-ice-cream.gif and /dev/null differ
diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/question.md b/lessons/L5/problem-set/07-making-peach-ice-cream/question.md
deleted file mode 100644
index 534bd8881..000000000
--- a/lessons/L5/problem-set/07-making-peach-ice-cream/question.md
+++ /dev/null
@@ -1,21 +0,0 @@
-I scream, you scream...
-
-![ice cream image](http://udacity.github.io/fend/lessons/L5/problem-set/07-making-peach-ice-cream/ice-cream.png)
-
-Time to switch gears! For this quiz, you'll be fixing [a webpage](http://udacity.github.io/fend/lessons/L5/problem-set/07-making-peach-ice-cream/index.html) that showcases my mom's homemade peach ice cream recipe. Yum! 🍦 🍨
-
-There are some issues with the webpage. It's using the default `content-box` for `box-sizing` and needs some tweaks done to the spacing between elements. Also, the recipe is enclosed inside a container, but the container is positioned all wrong. You'll need to set the `width` of the container and center it using a special trick with `margin`.
-
-## Centering Boxes
-
-When you set the width of a block element, it keeps the element from taking up the entire width of its container (as long as you set its width to something less than 100%). However, when you do this, the element stays fixed to the left side of the container. What if you want to _center_ it?
-
-![margin auto image](http://udacity.github.io/fend/lessons/L5/problem-set/07-making-peach-ice-cream/margin-auto.gif)
-
-_In this animation, the container is the width of the browser and the blue box is being centered inside the container._
-
-If you use the special keyword `auto` on the left and right margins of an element, you can horizontally center the element within its container. The combination of a set width and `margin: 0 auto;` (this is the [shorthand way](https://developer.mozilla.org/en-US/docs/Web/CSS/Shorthand_properties) of writing margin) will make the element take up the width you specify, and then the remaining horizontal space will be split "automatically" between the left and right margins. You see this used on a ton of websites!
-
----
-
-**Note: If you try this recipe, tell us about it! Share pictures [in the forums](https://discussions.udacity.com/t/making-peach-ice-cream-let-us-know/173298) and let us know how it matches up with other ice creams you've had. Sidenote, this recipe is all about the peaches. The better the peaches, the better the ice cream!**
\ No newline at end of file
diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/recipe-notes.png b/lessons/L5/problem-set/07-making-peach-ice-cream/recipe-notes.png
deleted file mode 100644
index 84c6f809f..000000000
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diff --git a/lessons/L5/problem-set/07-making-peach-ice-cream/tests.json b/lessons/L5/problem-set/07-making-peach-ice-cream/tests.json
deleted file mode 100644
index 9c0b837aa..000000000
--- a/lessons/L5/problem-set/07-making-peach-ice-cream/tests.json
+++ /dev/null
@@ -1,62 +0,0 @@
-[{
-  "name": "Making Peach Ice Cream",
-  "code": "doTHEiceCREAMandCAKE",
-  "tests": [
-    {
-      "description": "The page uses a sane box-sizing scheme",
-      "definition": {
-        "nodes": "body",
-        "cssProperty": "boxSizing",
-        "equals": "border-box"
-      }
-    },
-    {
-      "description": "The recipe has the correct fixed width",
-      "definition": {
-        "nodes": ".recipe",
-        "cssProperty": "width",
-        "equals": "800px"
-      }
-    },
-    {
-      "description": "The recipe is centered inside the paper background",
-      "definition": {
-        "nodes": ".recipe",
-        "cssProperty": "marginLeft",
-        "equals": "90px"
-      }
-    },
-    {
-      "description": "Section titles have the correct bottom padding",
-      "definition": {
-        "nodes": ".section-title",
-        "cssProperty": "paddingBottom",
-        "equals": "16px"
-      }
-    },
-    {
-      "description": "Section titles have the correct top margin",
-      "definition": {
-        "nodes": ".section-title",
-        "cssProperty": "marginTop",
-        "equals": "20px"
-      }
-    },
-    {
-      "description": "The receipe's author is inside an emphasized inline element",
-      "definition": {
-        "nodes": "em",
-        "get": "innerHTML",
-        "hasSubstring": "Recipe by: James Parkes"
-      }
-    },
-    {
-      "description": "The three recipe notes are displayed in a single line",
-      "definition": {
-        "nodes": ".recipe-note",
-        "cssProperty": "display",
-        "equals": "inline"
-      }
-    }
-  ]
-}]
diff --git a/lessons/L5/problem-set/08-set-the-table/answer.html b/lessons/L5/problem-set/08-set-the-table/answer.html
deleted file mode 100644
index 704a42563..000000000
--- a/lessons/L5/problem-set/08-set-the-table/answer.html
+++ /dev/null
@@ -1,98 +0,0 @@
-<!DOCTYPE html>
-
-<!-- Instructions: Build a table using the data set provided. -->
-
-<!--
-	Residents of the Mushroom Kingdon
-
-	Column Headings:
-	Name / Address / Occupation / Salary
-
-	Data Set:
-	Mario / 514 Mushroom Kingdom / Plumber / 49,150 Coins
-	Luigi / 6 Banshee Boardwalk / Plumber / 45,115 Coins
-	Peach / 123 Rainbow Road / Princess / 215,675 Coins
-	Yoshi / 120 Yoshi Valley / Wool Sales / 67,980 Coins
-	Bowser / 91 Bowser Castle / Real Estate Agent / 180,779 Coins
--->
-
-<html>
-<head>
-	<title>Set the Table</title>
-	<style>
-		* {
-			box-sizing: border-box;
-		}
-		body {
-			background-color: #fff !important;
-		}
-		table {
-			width: 100%;
-			border-collapse: collapse;
-			border-spacing: 0;
-			border: 1px solid #E1E1E1;
-		}
-		caption {
-			font-size: 2em;
-			margin: 0.67em 0;
-			font-weight: bold;
-			padding-left: 10px;
-			text-align: left;
-		}
-		th, td {
-			padding: 12px 15px;
-			text-align: left;
-			border-bottom: 1px solid #E1E1E1;
-		}
-		th {
-			background-color: #EC1B2E;
-			color: #FFF;
-		}
-	</style>
-</head>
-<body>
-	<table>
-		<caption>Residents of the Mushroom Kingdom</caption>
-		<thead>
-			<tr>
-				<th>Name</th>
-				<th>Address</th>
-				<th>Occupation</th>
-				<th>Salary</th>
-			</tr>
-		</thead>
-		<tbody>
-			<tr>
-				<td>Mario</td>
-				<td>514 Mushroom Kingdom</td>
-				<td>Plumber</td>
-				<td>49,150 Coins</td>
-			</tr>
-			<tr>
-				<td>Luigi</td>
-				<td>6 Banshee Boardwalk</td>
-				<td>Plumber</td>
-				<td>45,115 Coins</td>
-			</tr>
-			<tr>
-				<td>Peach</td>
-				<td>123 Rainbow Road</td>
-				<td>Princess</td>
-				<td>215,675 Coins</td>
-			</tr>
-			<tr>
-				<td>Yoshi</td>
-				<td>120 Yoshi Valley</td>
-				<td>Wool Sales</td>
-				<td>67,980 Coins</td>
-			</tr>
-			<tr>
-				<td>Bowser</td>
-				<td>91 Bowser Castle</td>
-				<td>Real Estate Agent</td>
-				<td>180,779 Coins</td>
-			</tr>
-		</tbody>
-	</table>
-</body>
-</html>
\ No newline at end of file
diff --git a/lessons/L5/problem-set/08-set-the-table/answer.md b/lessons/L5/problem-set/08-set-the-table/answer.md
deleted file mode 100644
index 4558e31a9..000000000
--- a/lessons/L5/problem-set/08-set-the-table/answer.md
+++ /dev/null
@@ -1,48 +0,0 @@
-Here's the final solution:
-
-```html
-<table>
-  <thead>
-    <tr>
-      <th>Name</th>
-      <th>Address</th>
-      <th>Occupation</th>
-      <th>Salary</th>
-    </tr>
-  </thead>
-  <tbody>
-    <tr>
-      <td>Mario</td>
-      <td>514 Mushroom Kingdom</td>
-      <td>Plumber</td>
-      <td>49,150 Coins</td>
-    </tr>
-    <tr>
-      <td>Luigi</td>
-      <td>6 Banshee Boardwalk</td>
-      <td>Plumber</td>
-      <td>45,115 Coins</td>
-    </tr>
-    <tr>
-      <td>Peach</td>
-      <td>123 Rainbow Road</td>
-      <td>Princess</td>
-      <td>215,675 Coins</td>
-    </tr>
-    <tr>
-      <td>Yoshi</td>
-      <td>120 Yoshi Valley</td>
-      <td>Wool Sales</td>
-      <td>67,980 Coins</td>
-    </tr>
-    <tr>
-      <td>Bowser</td>
-      <td>91 Bowser Castle</td>
-      <td>Real Estate Agent</td>
-      <td>180,779 Coins</td>
-    </tr>
-  </tbody>
-</table>
-```
-
-The solution above is still a pretty basic example of using a table. If you want to learn more about tables, then I highly recommend checking out css-tricks.com's [A Complete Guide to the Table Element](https://css-tricks.com/complete-guide-table-element/).
\ No newline at end of file
diff --git a/lessons/L5/problem-set/08-set-the-table/box-score-animation.gif b/lessons/L5/problem-set/08-set-the-table/box-score-animation.gif
deleted file mode 100644
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diff --git a/lessons/L5/problem-set/08-set-the-table/instructions.md b/lessons/L5/problem-set/08-set-the-table/instructions.md
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-### How to Complete this Quiz
-
-1. Build a table in the Udacity classroom using the column headings and data set provided.
-2. I've given you a head start by providing you the following boilerplate.
-
-```html
-<table>
-  <caption>Residents of the Mushroom Kingdom</caption>
-  <!-- build table here -->
-</table>
-```
-
-When you're ready, click "Skip to Quiz" to get started.
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diff --git a/lessons/L5/problem-set/08-set-the-table/question.html b/lessons/L5/problem-set/08-set-the-table/question.html
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-<!DOCTYPE html>
-
-<!-- Instructions: Build a table using the data set provided. -->
-
-<!--
-	Residents of the Mushroom Kingdon
-
-	Column Headings:
-	Name / Address / Occupation / Salary
-
-	Data Set:
-	Mario / 514 Mushroom Kingdom / Plumber / 49,150 Coins
-	Luigi / 6 Banshee Boardwalk / Plumber / 45,115 Coins
-	Peach / 123 Rainbow Road / Princess / 215,675 Coins
-	Yoshi / 120 Yoshi Valley / Wool Sales / 67,980 Coins
-	Bowser / 91 Bowser Castle / Real Estate Agent / 180,779 Coins
--->
-
-<html>
-<head>
-	<title>Set the Table</title>
-	<style>
-		* {
-			box-sizing: border-box;
-		}
-		body {
-			background-color: #fff !important;
-		}
-		table {
-			width: 100%;
-			border-collapse: collapse;
-			border-spacing: 0;
-			border: 1px solid #E1E1E1;
-		}
-		caption {
-			font-size: 2em;
-			margin: 0.67em 0;
-			font-weight: bold;
-			padding-left: 10px;
-			text-align: left;
-		}
-		th, td {
-			padding: 12px 15px;
-			text-align: left;
-			border-bottom: 1px solid #E1E1E1;
-		}
-		th {
-			background-color: #EC1B2E;
-			color: #FFF;
-		}
-	</style>
-</head>
-<body>
-	<table>
-		<caption>Residents of the Mushroom Kingdom</caption>
-		<!-- build table here -->
-	</table>
-</body>
-</html>
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diff --git a/lessons/L5/problem-set/08-set-the-table/question.md b/lessons/L5/problem-set/08-set-the-table/question.md
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index bae85f9ca..000000000
--- a/lessons/L5/problem-set/08-set-the-table/question.md
+++ /dev/null
@@ -1,80 +0,0 @@
-Tables are awesome for displaying information in _rows_ and _columns_, and it's time you built one!
-
-For this quiz, you'll be building a table from a simple data set within the Udacity classroom. I'll be providing you with the column headings and data set, but it will be your job to create the table to display the information.
-
-## Tables
-
-Tables are used to create and handle tabular data. That's just a fancy way of saying tables are used when you need to put information into rows and columns. For example, if you need to display days on a calendar, the box score for a sporting event, or results to an experiment.
-
-![box score example](http://udacity.github.io/fend/lessons/L5/problem-set/08-set-the-table/box-score-animation.gif)
-
-_Box score from Major League Baseball game between the San Francisco Giants and Atlanta Braves on June 1, 2016._
-
-Tables are fairly straightforward. Every `<table>` consists of a set of rows, `<tr>` , that each define a row of cells, `<td>` . Here's a basic example.
-
-![basic example](http://udacity.github.io/fend/lessons/L5/problem-set/08-set-the-table/table-1.png)
-
-```html
-<table>
-  <tr>
-    <td>Variety</td>
-    <td>Color</td>
-  </tr>
-  <tr>
-    <td>Fuji</td>
-    <td>Red blush, yellow stripes, green</td>
-  </tr>
-  <tr>
-    <td>Gala</td>
-    <td>Red-orange, yellow stripes</td>
-  </tr>
-  <tr>
-    <td>Golden Delicious</td>
-    <td>Yellow-green</td>
-  </tr>
-</table>
-```
-
-But you can do better than that! Tables also have other elements like `<th>` and `<tbody>` that you can use to make your data more semantic. To see a full list of table elements with descriptions check out [MDN's element reference](https://developer.mozilla.org/en-US/docs/Web/HTML/Element#Table_content).
-
-Using the same example from above, I've swapped in a variety of tags to better describe the data.
-
-![more semantic example](http://udacity.github.io/fend/lessons/L5/problem-set/08-set-the-table/table-2.png)
-
-```html
-<table>
-  <thead>
-    <tr>
-      <th>Variety</th>
-      <th>Color</th>
-    </tr>
-  </thead>
-  <tbody>
-    <tr>
-      <td>Fuji</td>
-      <td>Red blush, yellow stripes, green</td>
-    </tr>
-    <tr>
-      <td>Gala</td>
-      <td>Red-orange, yellow stripes</td>
-    </tr>
-    <tr>
-      <td>Golden Delicious</td>
-      <td>Yellow-green</td>
-    </tr>
-  </tbody>
-</table>
-```
-
-### Before You Get Started
-
-Now before you get all excited about the cool things you can do with tables, you should be aware of when it's not appropriate to use tables. _Tables are not meant for layouts._ It can be tempting to want to use a table to position elements, but tables do have some limitations.
-
-1. Tables are not very _semantic_, at least not for layouts.
-    - Tables are great for describing tabular things like rows, columns, or headings, but not for describing the structure of a webpage. You can use more descriptive tags like `<header>` , `<nav>` , `<aside>` , or `<footer>` to describe the logical pieces of your webpage.
-2. Using tables for layouts is bad for accessibility.
-    - We haven't talked much about **accessibilty** yet, but this is _hugely_ important. Many users with physical impairments rely on [screen readers](https://en.wikipedia.org/wiki/Screen_reader) to consume content on the web. For tables, screen readers read from top-to-bottom then left-to-right. If your webpage is laid out using a table, then it forces the webpage to be represented by the table's structure. This isn't ideal because a table's structure is typically not the best way to communicate which pieces of your layout are more important than others. Plus, it's just lazy. In the next lesson, you'll see how you can layout your webpages using different positioning techniques. 
-3. Using tables for layouts is bad for SEO.
-    - For the same reasons mentioned in points 1 and 2, using tables for layouts can hurt your website's SEO. Crawlers, the programs search engines use to scan and analyze your website, try to understand what information on your website is the most important so that it can better surface content for its users. Again, when you use tables for layouts, this can get lost in translation because tables aren't very _semantic_ when it comes to describing layouts.
-
-In summary, **do NOT use tables for layouts.**
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diff --git a/lessons/L5/problem-set/08-set-the-table/table-2.png b/lessons/L5/problem-set/08-set-the-table/table-2.png
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diff --git a/lessons/L5/problem-set/08-set-the-table/tests.js b/lessons/L5/problem-set/08-set-the-table/tests.js
deleted file mode 100644
index efba4ed70..000000000
--- a/lessons/L5/problem-set/08-set-the-table/tests.js
+++ /dev/null
@@ -1,142 +0,0 @@
-function performSubmission() {
-  var grader = new Grader({
-    // can add shared messages here
-  });
-
-  grader.addTest(function() {
-    return grader.elemDoesExist('table') && grader.hasCorrectLength('table', 1);
-  }, {
-    wrongMessage: "You're missing a table! Add `<table>` to start it and `</table>` to close it."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.doesExistInParent('thead', 'table') && grader.doesExistInParent('tbody', 'table');
-  }, {
-    wrongMessage: "Your table should have a head and a body. Use `<thead>` for the column headings and `<tbody>` for the data set."
-  }, false);
-
-  grader.addTest(function() {
-    return !grader.elemDoesExist('tfoot');
-  }, {
-    wrongMessage: "There shouldn't be a `<tfoot>` in your table."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.hasCorrectLength('tr', 6);
-  }, {
-    wrongMessage: "There should be six `<tr>`s in your table.\n"
-  });
-
-  grader.addTest(function() {
-    return grader.hasCorrectLength('thead tr', 1) && grader.hasCorrectLength('tbody tr', 5);
-  }, {
-    wrongMessage: "You should have one `<tr>` for the column headings and five `<tr>`s for the data set."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.elemDoesExist('thead th') && grader.hasCorrectLength('thead th', 4) && grader.hasParent('th', 'thead');
-  }, {
-    wrongMessage: "There should be four `<th>`s in your table.\n"
-  });
-
-  grader.addTest(function() {
-    return !(grader.elemDoesExist('thead td') && grader.hasCorrectLength('thead td', 4) && grader.hasParent('td', 'thead'));
-  }, {
-    wrongMessage: "Make sure to use table header cells (`<th>`) instead of basic table cells (`<td>`) for the column headings."
-  }, false);
-
-  grader.addTest(function() {
-    return grader.elemDoesExist('tbody td') && grader.hasCorrectLength('tbody td', 20) && grader.hasParent('td', 'tbody tr');
-  }, {
-    wrongMessage: "There should be twenty `<td>`s in your table, four per row.\n"
-  }, false);
-
-  grader.addTest(function() {
-    var isCorrect = true;
-    var correctHeadings = ["name", "address", "occupation", "salary"];
-    var submissionHeadings = [];
-
-    // grab student's headings
-    $('th').each(function() {
-       submissionHeadings.push($(this).html().toLowerCase());
-    });
-
-    // test student's headings against correct headings
-    for (var i = 0; i < submissionHeadings.length; i++) {
-      if (correctHeadings[i] !== submissionHeadings[i]) {
-        isCorrect = false;
-      }
-    }
-
-    return isCorrect;
-  }, {
-    wrongMessage: "Check your column headings. Are you using the same column headings that are provided in the comments?"
-  }, false);
-
-  grader.addTest(function() {
-    var correctHeadings = ["name", "address", "occupation", "salary"];
-    var submissionHeadings = [];
-
-    // grab student's headings
-    $('th').each(function() {
-       submissionHeadings.push($(this).html().toLowerCase());
-    });
-
-    // test student's headings against correct headings
-    for (var i = 0; i < correctHeadings.length; i++) {
-      if (correctHeadings[i] !== submissionHeadings[i]) {
-        return false;
-      }
-    }
-
-    return true;
-  }, {
-    wrongMessage: "Check your column headings. Are you using the same column headings that are provided in the comments?"
-  }, false);
-
-  grader.addTest(function() {
-    var correctDataSet = [
-      ["mario", "514 mushroom kingdom", "plumber", "49,150 coins"],
-      ["luigi", "6 banshee boardwalk", "plumber", "45,115 coins"],
-      ["peach", "123 rainbow road", "princess", "215,675 coins"],
-      ["yoshi", "120 yoshi valley", "wool sales", "67,980 coins"],
-      ["bowser", "91 bowser castle", "real estate agent", "180,779 coins"]
-    ];
-    var submissionDataSet = [];
-
-    // grab student's data set
-    $('tbody tr').each(function() {
-      var rowDataSet = [];
-      // get one row at a time
-      $('td', $(this)).each(function() {
-        rowDataSet.push($(this).html().toLowerCase());
-      });
-      // push row onto data set
-      submissionDataSet.push(rowDataSet);
-      rowDataSet = [];
-    });
-
-    // test student's data set against correct data set
-    for (var i = 0; i < correctDataSet.length; i++) {
-      for (var j = 0; j < correctDataSet[i].length; j++) {
-        if (correctDataSet[i][j] !== submissionDataSet[i][j]) {
-          return false;
-        }
-      }
-    }
-
-    return true;
-  }, {
-    wrongMessage: "Check your table cells. Are you using the same data set that is provided in the comments?"
-  }, false);
-
-  grader.runTests();
-
-  result = {
-    is_correct: grader.isCorrect,
-    test_feedback: grader.getFormattedWrongMessages('\n'),
-    test_comments: grader.getFormattedComments('\n'),
-    congrats: "Awesome! I wonder how many coins Mario has earned saving the Princess?"
-  };
-  return result;
-}
\ No newline at end of file
diff --git a/lessons/L5/problem-set/09-div-soup-clean-up/answer.md b/lessons/L5/problem-set/09-div-soup-clean-up/answer.md
deleted file mode 100644
index a3988fd37..000000000
--- a/lessons/L5/problem-set/09-div-soup-clean-up/answer.md
+++ /dev/null
@@ -1,53 +0,0 @@
-Here's my solution.
-
-For brevity, I used ellipses (`...`) to denote the areas of the solution that didn't change.
-
-```html
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <!-- ... -->
-    <title>Div Soup Clean Up</title>
-    <!-- ... -->
-  </head>
-  <body>
-    <header class="navbar-static-top">
-      <section class="container">
-          <a class="navbar-brand" href="#">Company Name</a>
-          <nav>
-            <!-- ... -->
-          </nav>
-      </section>
-    </header>
-    <section class="container hero">
-      <!-- ... -->
-      <div class="hero-text">
-        <h1 class="headline">The Future is Here!</h1>
-        <!-- ... -->
-        <button class="btn btn-lg btn-primary" href="#">Sign up today</button>
-      </div>
-    </section>
-    <section class="container">
-      <article class="row">
-        <!-- ... -->
-      </article>
-      <hr class="divider">
-      <article class="row">
-        <!-- ... -->
-      </article>
-      <hr class="divider">
-      <article class="row">
-        <!-- ... -->
-      </article>
-      <hr class="divider">
-      <footer>
-        <!-- ... -->
-      </footer>
-    </section>
-  </body>
-</html>
-```
-
-When completing the quiz, you shouldn't have noticed anything visually change; however, by cleaning up some of the `<div>`s you should have recognized how much easier it is to read the HTML. 
-
-As you are building websites, try to avoid div soup situations. Also, remember that semantic tags aren't your only tool in the battle for better HTML. You can use `id` and `class` attributes too!
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diff --git a/lessons/L5/problem-set/09-div-soup-clean-up/css/bootstrap.min.css b/lessons/L5/problem-set/09-div-soup-clean-up/css/bootstrap.min.css
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--- a/lessons/L5/problem-set/09-div-soup-clean-up/css/bootstrap.min.css
+++ /dev/null
@@ -1,6 +0,0 @@
-/*!
- * Bootstrap v3.3.6 (http://getbootstrap.com)
- * Copyright 2011-2015 Twitter, Inc.
- * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
- *//*! normalize.css v3.0.3 | MIT License | github.com/necolas/normalize.css */html{font-family:sans-serif;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}body{margin:0}article,aside,details,figcaption,figure,footer,header,hgroup,main,menu,nav,section,summary{display:block}audio,canvas,progress,video{display:inline-block;vertical-align:baseline}audio:not([controls]){display:none;height:0}[hidden],template{display:none}a{background-color:transparent}a:active,a:hover{outline:0}abbr[title]{border-bottom:1px dotted}b,strong{font-weight:700}dfn{font-style:italic}h1{margin:.67em 0;font-size:2em}mark{color:#000;background:#ff0}small{font-size:80%}sub,sup{position:relative;font-size:75%;line-height:0;vertical-align:baseline}sup{top:-.5em}sub{bottom:-.25em}img{border:0}svg:not(:root){overflow:hidden}figure{margin:1em 40px}hr{height:0;-webkit-box-sizing:content-box;-moz-box-sizing:content-box;box-sizing:content-box}pre{overflow:auto}code,kbd,pre,samp{font-family:monospace,monospace;font-size:1em}button,input,optgroup,select,textarea{margin:0;font:inherit;color:inherit}button{overflow:visible}button,select{text-transform:none}button,html input[type=button],input[type=reset],input[type=submit]{-webkit-appearance:button;cursor:pointer}button[disabled],html input[disabled]{cursor:default}button::-moz-focus-inner,input::-moz-focus-inner{padding:0;border:0}input{line-height:normal}input[type=checkbox],input[type=radio]{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;padding:0}input[type=number]::-webkit-inner-spin-button,input[type=number]::-webkit-outer-spin-button{height:auto}input[type=search]{-webkit-box-sizing:content-box;-moz-box-sizing:content-box;box-sizing:content-box;-webkit-appearance:textfield}input[type=search]::-webkit-search-cancel-button,input[type=search]::-webkit-search-decoration{-webkit-appearance:none}fieldset{padding:.35em .625em .75em;margin:0 2px;border:1px solid silver}legend{padding:0;border:0}textarea{overflow:auto}optgroup{font-weight:700}table{border-spacing:0;border-collapse:collapse}td,th{padding:0}/*! 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diff --git a/lessons/L5/problem-set/09-div-soup-clean-up/img/bridge.svg b/lessons/L5/problem-set/09-div-soup-clean-up/img/bridge.svg
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diff --git a/lessons/L5/problem-set/09-div-soup-clean-up/img/wallet.svg b/lessons/L5/problem-set/09-div-soup-clean-up/img/wallet.svg
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diff --git a/lessons/L5/problem-set/09-div-soup-clean-up/img/write.jpg b/lessons/L5/problem-set/09-div-soup-clean-up/img/write.jpg
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diff --git a/lessons/L5/problem-set/09-div-soup-clean-up/index.html b/lessons/L5/problem-set/09-div-soup-clean-up/index.html
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--- a/lessons/L5/problem-set/09-div-soup-clean-up/index.html
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-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8">
-    <meta http-equiv="X-UA-Compatible" content="IE=edge">
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    <title>Div Soup Clean Up</title>
-    <link href="css/bootstrap.min.css" rel="stylesheet">
-    <link href="css/styles.css" rel="stylesheet">
-    <meta name="udacity-grader" content="tests.json">
-  </head>
-  <body>
-    <div class="navbar-static-top">
-      <div class="container">
-          <a class="navbar-brand" href="#">Company Name</a>
-          <nav>
-            <ul class="nav navbar-nav navbar-right">
-              <li><a href="#">About</a></li>
-              <li><a href="#">Press</a></li>
-              <li><a href="#">Contact</a></li>
-            </ul>
-          </nav>
-      </div>
-    </div>
-    <div class="container hero">
-      <div class="hero-image"></div>
-      <div class="hero-text">
-        <div class="headline">The Future is Here!</div>
-        <p class="teaser">Are you ready to change the way you connect?</p>
-        <a class="btn btn-lg btn-primary" href="#">Sign up today</a>
-      </div>
-    </div>
-    <div class="container">
-      <div class="row">
-        <div class="col-md-7">
-          <h2 class="featured-heading">One end-to-end solution. <span class="text-muted">Just plug and play.</span></h2>
-          <p class="lead">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation nisi ut aliquip ex ea commodo.</p>
-        </div>
-        <div class="col-md-4 col-md-offset-1">
-          <img class="featured-image img-responsive center-block" src="img/bridge.svg" alt="bridge">
-        </div>
-      </div>
-      <hr class="divider">
-      <div class="row">
-        <div class="col-md-7 col-md-push-5">
-          <h2 class="featured-heading">Save money fast. <span class="text-muted">Check it out.</span></h2>
-          <p class="lead">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation nisi ut aliquip ex ea commodo.</p>
-        </div>
-        <div class="col-md-4 col-md-pull-7">
-          <img class="featured-image img-responsive center-block" src="img/wallet.svg" alt="wallet">
-        </div>
-      </div>
-      <hr class="divider">
-      <div class="row">
-        <div class="col-md-7">
-          <h2 class="featured-heading">Define your success. <span class="text-muted">Learn more.</span></h2>
-          <p class="lead">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation nisi ut aliquip ex ea commodo.</p>
-        </div>
-        <div class="col-md-4 col-md-offset-1">
-          <img class="featured-image img-responsive center-block" src="img/book.svg" alt="book">
-        </div>
-      </div>
-      <hr class="divider">
-      <div>
-        <p>&copy; 2016 Company Name &middot; <a href="#">Privacy Policy</a> &middot; <a href="#">Terms &amp; Conditions</a></p>
-      </div>
-    </div>
-  </body>
-</html>
diff --git a/lessons/L5/problem-set/09-div-soup-clean-up/instructions.md b/lessons/L5/problem-set/09-div-soup-clean-up/instructions.md
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-### How to Complete this Quiz
-
-1. Download the landing page from the resources section or from [here](http://udacity.github.io/fend/lessons/L5/problem-set/09-div-soup-clean-up/div-soup-clean-up.zip). 
-2. Edit `index.html` using your favorite text editor. You'll need to replace certain `<div>`s with semantic elements to clean up the **"div soup"**.
-3. Turn on the [Udacity Feedback Chrome Extension](https://classroom.udacity.com/nanodegrees/nd001/parts/0011345403/modules/742847927175460/lessons/7323812069/concepts/73256617910923).
-4. Once all of the tests pass, you'll receive a code. Copy and paste the code that appears into the next page to finish!
-
-<br>
-
-Good luck!
\ No newline at end of file
diff --git a/lessons/L5/problem-set/09-div-soup-clean-up/question.md b/lessons/L5/problem-set/09-div-soup-clean-up/question.md
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-Mmmm, tasty! A nice bowl of soup.
-
-![div soup](http://udacity.github.io/fend/lessons/L5/problem-set/09-div-soup-clean-up/div-soup.jpg)
-
-_Wow, this problem set has a lot of food references. Maybe I should have eaten something before putting these exercises together..._
-
-While alphabet soup is great, div soup is not so great. Div soup occurs when the majority of a webpage is built with `<div>`s. Technically, there is nothing wrong with this, but cognitively this is a problem. Your HTML should be descriptive and communicate what is happening on the page.
-
-![div soup example](http://udacity.github.io/fend/lessons/L5/problem-set/09-div-soup-clean-up/div-soup-example.png)
-
-_I wonder what this HTML does?_
-
-For this quiz, I want you to clean up some div soup. I've created a fictitious [landing page](http://udacity.github.io/fend/lessons/L5/problem-set/09-div-soup-clean-up/index.html) and it will be your job to replace `<div>`s with more meaningful markup. Download the .zip file containing the site's HTML and CSS from the resources section or directly from [this link](http://udacity.github.io/fend/lessons/L5/problem-set/09-div-soup-clean-up/div-soup-clean-up.zip) and modify the HTML to use semantic elements. Use [MDN's element reference](https://developer.mozilla.org/en-US/docs/Web/HTML/Element) if you need help.
-
----
-
-### Image Credit
-
-- 'Div Soup' by Ryland Sanders via [www.redkid.net](http://www.redkid.net/generator/soup/).
\ No newline at end of file
diff --git a/lessons/L5/problem-set/09-div-soup-clean-up/tests.json b/lessons/L5/problem-set/09-div-soup-clean-up/tests.json
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-[{
-  "name": "Div Soup Clean Up",
-  "code": "CALLTHEcleanupCREW",
-  "tests": [
-    {
-      "description": "Turn the static navbar &lt;div&gt; into a &lt;header&gt;",
-      "definition": {
-        "nodes": "header.navbar-static-top",
-        "exists": true
-      }
-    },
-    {
-      "description": "Turn three \"container\" &lt;div&gt;s into &lt;section&gt;s",
-      "definition": {
-        "nodes": "section.container",
-        "get": "count",
-        "equals": 3
-      }
-    },
-    {
-      "description": "Turn three \"row\" &lt;div&gt;s into &lt;article&gt;s",
-      "definition": {
-        "nodes": "article.row",
-        "get": "count",
-        "equals": 3
-      }
-    },
-    {
-      "description": "Put the copyright info into a &lt;footer&gt;",
-      "definition": {
-        "nodes": "footer",
-        "get": "innerHTML",
-        "hasSubstring": ".*2016 Company Name.*Privacy Policy.*Terms &amp; Conditions.*"
-      }
-    },
-    {
-      "description": "Turn the headline &lt;div&gt; into an &lt;h1&gt;",
-      "definition": {
-        "nodes": "h1.headline",
-        "exists": true
-      }
-    },
-    {
-      "description": "Turn the sign up button into a &lt;button&gt;",
-      "definition": {
-        "nodes": "button.btn",
-        "exists": true
-      }
-    }
-  ]
-}]
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diff --git a/lessons/L6/README.md b/lessons/L6/README.md
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--- a/lessons/L6/README.md
+++ /dev/null
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-# Assets for ???
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diff --git a/lessons/L6/concepts/XX-inline-boxes/inline-block-list-1.png b/lessons/L6/concepts/XX-inline-boxes/inline-block-list-1.png
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diff --git a/lessons/L6/concepts/XX-inline-boxes/notes.md b/lessons/L6/concepts/XX-inline-boxes/notes.md
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-You know, wouldn't it be great if you could create an element that behaves like an inline element, but is sized like a block element? Well, you can!
-
-## Inline-Block
-
-Let me introduce you to **inline-block**! But first, to understand how inline-block works, it's probably best we review inline and block elements.
-
-![block vs. inline vs. inline-block](http://udacity.github.io/fend/lessons/L6/concepts/XX-inline-boxes/inline-block.png)
-
-### Inline vs. Block Elements
-
-Inline elements can't have a set `height` or `width`, instead their height and width are determined by their content. Also, inline elements sit _inline_ with other elements. Basically, they allow other elements to be adjacent to their left and right. Finally, inline elements can have `padding` and `margin`, with the exception of top and bottom margin which they totally ignore.
-
-On the other hand, you have block elements. Block elements have a set height and width, they take up as much width as possible; so elements can't sit beside them, and they allow both padding and margin.
-
-So with that out of the way, how do inline-block elements work?
-
-Inline-block elements combine the best of both worlds; although it does have it drawbacks, more on that in just a moment. They allow other elements to sit to their left and right, they accept top and bottom margin, and they can have a set height and width. What's not to love!
-
-### Whitespace Weirdness
-
-Inline-block isn't all fun and games, it does have some quirks. One quirk in particular is how inline-block treats whitespace. If you look at the example below, I've created an unordered list and used `inline-block` to display its list items.
-
-```html
-<ul>
-  <li>Item 1</li>
-  <li>Item 2</li>
-  <li>Item 3</li>
-</ul>
-```
-
-![inline block list with whitespace](http://udacity.github.io/fend/lessons/L6/concepts/XX-inline-boxes/inline-block-list-2.png)
-
-_Do you notice the whitespace in between each item?_
-
-If you look at the list do you see the whitespace between each item? Where is that whitespace coming from? You might be suprised to find out that the whitespace is actaully created from the space between list items in your code!
-
-![say what! meme](http://udacity.github.io/fend/lessons/L6/concepts/XX-inline-boxes/say-what-meme.png)
-
-There are a number of ways to [fix this problem](http://dabblet.com/gist/2422174), but I recommended removing the space in your code. You can do this by removing the space entirely or adding comments in between each line item.
-
-```html
-<ul>
-  <li>Item 1</li><!--
-  --><li>Item 2</li><!--
-  --><li>Item 3</li>
-</ul>
-```
-
-![inline block list no whitespace](http://udacity.github.io/fend/lessons/L6/concepts/XX-inline-boxes/inline-block-list-1.png)
-
-If you're willing to work through the quirkiness of inline-block, then it's a viable option for laying out elements.
-
----
-
-I think that's enough of a break for now. Let's get back to the quizzes. When you're ready, click "Next".
\ No newline at end of file
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-* {
-	box-sizing: border-box;
-}
-
-.container {
-	margin: 50px auto 0;
-	width: 640px;
-	height: 480px;
-    background-image: url(../img/puzzle-quiz_background.png);
-}
-
-.puzzle {
-	position: static; /* test */
-	width: 640px;
-	height: 480px;
-}
-
-.piece {
-	display: block;
-	position: absolute;
-	height: 120px;
-	counter-increment: step-counter;
-}
-
-.piece::after {
-	content: counter(step-counter);
-	position: absolute;
-	top: 0;
-	right: 0;
-	background-color: #000;
-	color: #fff;
-	font-size: 16px;
-	height: 18px;
-	width: 18px;
-	text-align: center;
-}
-
-.piece-1 { left: 0; top: 0; }
-.piece-2 { left: 160px; top: 0; }
-.piece-3 { left: 320px; top: 0; }
-.piece-4 { left: 252px; top: 150px; } /* test */
-.piece-5 { left: 0; top: 120px; }
-.piece-6 { left: 160px; top: 120px; }
-.piece-7 { left: 320px; top: 120px; }
-.piece-8 { left: 480px; top: 120px; }
-.piece-9 { left: -20px; top: 215px; } /* test */
-.piece-10 { left: 160px; top: 240px; }
-.piece-11 { left: 320px; top: 240px; }
-.piece-12 { left: 480px; top: 240px; }
-.piece-13 { left: 0; top: 360px; }
-.piece-14 { left: 160px; top: 360px; }
-.piece-15 { left: 320px; top: 360px; }
-.piece-16 { left: 500px; top: 399px; } /* test */
-
-.piece-6 { position: static; } /* test */
-
-.piece-4, .piece-9, .piece-16 {
-	z-index: 1;
-}
-
-.credit {
-	width: 640px;
-	padding: 0.5em 1em;
-	margin: 0 auto;
-}
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diff --git a/lessons/L6/problem-set/XX-solve-the-puzzle/img/puzzle-quiz_background.png b/lessons/L6/problem-set/XX-solve-the-puzzle/img/puzzle-quiz_background.png
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diff --git a/lessons/L6/problem-set/XX-solve-the-puzzle/index.html b/lessons/L6/problem-set/XX-solve-the-puzzle/index.html
deleted file mode 100644
index b2349208d..000000000
--- a/lessons/L6/problem-set/XX-solve-the-puzzle/index.html
+++ /dev/null
@@ -1,66 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-	<meta charset="utf-8">
-	<title>Solve the Puzzle</title>
-	<link href="css/styles.css" rel="stylesheet">
-	<meta name="udacity-grader" content="tests.json">
-</head>
-<body>
-	<div class="container">
-		<div class="puzzle">
-			<div class="piece piece-1">
-				<img src="img/puzzle-quiz_1.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-2">
-				<img src="img/puzzle-quiz_2.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-3">
-				<img src="img/puzzle-quiz_3.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-4">
-				<img src="img/puzzle-quiz_4.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-5">
-				<img src="img/puzzle-quiz_5.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-6">
-				<img src="img/puzzle-quiz_6.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-7">
-				<img src="img/puzzle-quiz_7.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-8">
-				<img src="img/puzzle-quiz_8.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-9">
-				<img src="img/puzzle-quiz_9.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-10">
-				<img src="img/puzzle-quiz_10.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-11">
-				<img src="img/puzzle-quiz_11.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-12">
-				<img src="img/puzzle-quiz_12.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-13">
-				<img src="img/puzzle-quiz_13.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-14">
-				<img src="img/puzzle-quiz_14.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-15">
-				<img src="img/puzzle-quiz_15.png" width="160" height="120" alt="puzzle piece">
-			</div>
-			<div class="piece piece-16">
-				<img src="img/puzzle-quiz_16.png" width="160" height="120" alt="puzzle piece">
-			</div>
-		</div>
-	</div>
-	<div class="credit">
-		<p>Vincent van Gogh<br><em>The Starry Night</em><br>Saint Rémy, June 1889</p>
-	</div>
-</body>
-</html>
diff --git a/lessons/L6/problem-set/XX-solve-the-puzzle/tests.json b/lessons/L6/problem-set/XX-solve-the-puzzle/tests.json
deleted file mode 100644
index a70cfcab5..000000000
--- a/lessons/L6/problem-set/XX-solve-the-puzzle/tests.json
+++ /dev/null
@@ -1,70 +0,0 @@
-[{
-  "name": "Solve the Puzzle",
-  "code": "PLACEtheJiggies",
-  "tests": [
-    {
-      "description": "The 6th puzzle piece is absolutely positioned.",
-      "definition": {
-        "nodes": ".piece-6",
-        "cssProperty": "position",
-        "equals": "absolute"
-      }
-    },
-    {
-      "description": "The puzzle is relatively positioned.",
-      "definition": {
-        "nodes": ".puzzle",
-        "cssProperty": "position",
-        "equals": "relative"
-      }
-    },
-    {
-      "description": "The top position of the 4th puzzle piece is correct.",
-      "definition": {
-        "nodes": ".piece-4",
-        "cssProperty": "top",
-        "equals": "0px"
-      }
-    },
-    {
-      "description": "The left position of the 4th puzzle piece is correct.",
-      "definition": {
-        "nodes": ".piece-4",
-        "cssProperty": "left",
-        "equals": "480px" 
-      }
-    }, 
-    {
-      "description": "The top position of the 9th puzzle piece is correct.",
-      "definition": {
-        "nodes": ".piece-9",
-        "cssProperty": "top",
-        "equals": "240px"
-      }
-    },
-    {
-      "description": "The left position of the 9th puzzle piece is correct.",
-      "definition": {
-        "nodes": ".piece-9",
-        "cssProperty": "left",
-        "equals": "0px"
-      }
-    },
-    {
-      "description": "The top position of the 16th puzzle piece is correct.",
-      "definition": {
-        "nodes": ".piece-16",
-        "cssProperty": "top",
-        "equals": "360px"
-      }
-    },
-    {
-      "description": "The left position of the 16th puzzle piece is correct.",
-      "definition": {
-        "nodes": ".piece-16",
-        "cssProperty": "left",
-        "equals": "480px"
-      }
-    }
-  ]
-}]
\ No newline at end of file
diff --git a/projects/landing-page/README.md b/projects/landing-page/README.md
new file mode 100755
index 000000000..3282de7b9
--- /dev/null
+++ b/projects/landing-page/README.md
@@ -0,0 +1,13 @@
+# Landing Page Project
+
+## Table of Contents
+
+* [Instructions](#instructions)
+
+## Instructions
+
+The starter project has some HTML and CSS styling to display a static version of the Landing Page project. You'll need to convert this project from a static project to an interactive one. This will require modifying the HTML and CSS files, but primarily the JavaScript file.
+
+To get started, open `js/app.js` and start building out the app's functionality
+
+For specific, detailed instructions, look at the project instructions in the Udacity Classroom.
diff --git a/projects/landing-page/css/styles.css b/projects/landing-page/css/styles.css
new file mode 100755
index 000000000..16145e98c
--- /dev/null
+++ b/projects/landing-page/css/styles.css
@@ -0,0 +1,223 @@
+/*
+ *
+ * CSS written based on SMACSS architecture.
+ * To learn more, visit: http://smacss.com/
+ * 
+ * For simplicity, no reset or normalize is added. 
+ * To learn more, visit: https://css-tricks.com/reboot-resets-reasoning/
+ *
+*/
+
+
+/* ---- Base Rules ---- */
+body {
+    background: rgb(136,203,171);
+    background: linear-gradient(0deg, rgba(136,203,171,1) 0%, rgba(0,13,60,1) 100%);
+    margin: 0;
+    font-family: 'Merriweather', serif;
+    color: #fff;
+}
+
+
+/* Typeography General*/
+h1 {
+    font-family: 'Fira Sans', sans-serif;
+    font-size: 3em;
+    margin: 2em 1rem;
+}
+
+@media only screen and (min-width: 35em){
+    h1 {
+        font-size: 7em;
+        margin: 2em 4rem 1em;
+    }
+}
+
+h2 {
+    border-bottom: 1px solid #cc1;
+    font-family: 'Oxygen', Sans-Serif;
+    font-size: 3em;
+    color: #fff;
+}
+
+p {
+    line-height: 1.6em;
+    color: #eee;
+}
+
+/* ---- Layout Rules ---- */
+main {
+    margin: 10vh 1em 10vh;
+}
+
+.main-hero {
+    min-height: 40vh;
+    padding-top: 3em;
+}
+
+section {
+    position: relative;
+    min-height: 80vh;
+}
+
+
+/* ---- Module Rules ---- */
+
+/* Navigation Styles*/
+.navbar__menu ul {
+    padding-left: 0;
+    margin: 0;
+    text-align: right;
+}
+
+.navbar__menu li {
+    display: inline-block;
+}
+
+.navbar__menu .menu__link {
+    display: block;
+    padding: 1em;
+    font-weight: bold;
+    text-decoration: none;
+    color: #000;
+}
+
+.navbar__menu .menu__link:hover {
+    background: #333;
+    color: #fff;
+    transition: ease 0.3s all;
+}
+
+/* Header Styles */
+.page__header {
+    background: #fff;
+    position: fixed;
+    top: 0;
+    width: 100%;
+    z-index: 5;
+}
+
+/* Footer Styles */
+.page__footer {
+    background: #000;
+    padding: 3em;
+    color: #fff;
+}
+
+.page__footer p{
+    color: #fff;
+}
+
+
+/* ---- Theme Rules ---- */
+/* Landing Container Styles */
+.landing__container {
+    padding: 1em;
+    text-align: left;
+}
+
+@media only screen and (min-width: 35em){
+    .landing__container {
+        max-width: 50em;
+        padding: 4em;
+    }
+}
+
+section:nth-of-type(even) .landing__container {
+    margin-right: 0;
+    margin-left: auto;
+    text-align: right; 
+}
+
+/* Background Circles */
+/* Note that background circles are created with psuedo elements before and after */
+/* Circles appear to be random do to use of :nth-of-type psuedo class */
+section:nth-of-type(odd) .landing__container::before {
+    content: '';
+    background: rgba(255, 255, 255, 0.187);
+    position: absolute;
+    z-index: -5;
+    width: 20vh;
+    height: 20vh;
+    border-radius: 50%;
+    opacity: 0;
+    transition: ease 0.5s all;
+}
+
+section:nth-of-type(even) .landing__container::before {
+    content: '';
+    background: rgb(255,255,255);
+    background: linear-gradient(0deg, rgba(255,255,255,.1) 0%, rgba(255,255,255,.2) 100%);
+    position: absolute;
+    top: 3em;
+    right: 3em;
+    z-index: -5;
+    width: 10vh;
+    height: 10vh;
+    border-radius: 50%;
+    opacity: 0;
+    transition: ease 0.5s all;
+}
+
+section:nth-of-type(3n) .landing__container::after {
+    content: '';
+    background: rgb(255,255,255);
+    background: linear-gradient(0deg, rgba(255,255,255,.1) 0%, rgba(255,255,255,.2) 100%);
+    position: absolute;
+    right: 0;
+    bottom: 0;
+    z-index: -5;
+    width: 10vh;
+    height: 10vh;
+    border-radius: 50%;
+    opacity: 0;
+    transition: ease 0.5s all;
+}
+
+section:nth-of-type(3n + 1) .landing__container::after {
+    content: '';
+    background: rgb(255,255,255);
+    background: linear-gradient(0deg, rgba(255,255,255,.1) 0%, rgba(255,255,255,.2) 100%);
+    position: absolute;
+    right: 20vw;
+    bottom: -5em;
+    z-index: -5;
+    width: 15vh;
+    height: 15vh;
+    border-radius: 50%;
+    opacity: 0;
+    transition: ease 0.5s all;
+}
+
+
+/* ---- Theme State Rules ---- */
+/* Section Active Styles */
+/* Note: your-active-class class is applied through javascript. You should update the class here and in the index.html to what you set in your javascript file.  */
+section.your-active-class {
+    background: rgb(0, 0, 0);
+    background: linear-gradient(0deg, rgba(0, 0, 0, 0.1) 0%, rgba(0, 0, 0, 0) 100%);
+}
+
+section.your-active-class .landing__container::before {
+    opacity: 1;
+    animation: rotate 4s linear 0s infinite forwards;
+}
+
+section.your-active-class .landing__container::after {
+    opacity: 1;
+    animation: rotate 5s linear 0s infinite forwards reverse;
+}
+
+/* Section Active Styles Keyframe Animations */
+@keyframes rotate {
+	from {
+		transform: rotate(0deg)
+		           translate(-1em)
+		           rotate(0deg);
+	}
+	to {
+		transform: rotate(360deg)
+		           translate(-1em) 
+		           rotate(-360deg);
+	}
+}
\ No newline at end of file
diff --git a/projects/landing-page/index.html b/projects/landing-page/index.html
new file mode 100755
index 000000000..2b939b768
--- /dev/null
+++ b/projects/landing-page/index.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <meta http-equiv="X-UA-Compatible" content="ie=edge">
+  <title>Manipulating the DOM</title>
+  <!-- Load Google Fonts -->
+  <link href="https://fonts.googleapis.com/css?family=Fira+Sans:900|Merriweather&display=swap" rel="stylesheet">  <!-- Load Styles -->
+  <link href="css/styles.css" rel="stylesheet">
+</head>
+<body>
+  <!-- HTML Follows BEM naming conventions 
+  IDs are only used for sections to connect menu achors to sections -->
+  <header class="page__header">
+    <nav class="navbar__menu">
+      <!-- Navigation starts as empty UL that will be populated with JS -->
+      <ul id="navbar__list"></ul>
+    </nav>
+  </header>
+  <main>
+    <header class="main__hero">
+      <h1>Landing Page </h1>
+    </header>
+    <!-- Each Section has an ID (used for the anchor) and 
+    a data attribute that will populate the li node.
+    Adding more sections will automatically populate nav.
+    The first section is set to active class by default -->
+    <section id="section1" data-nav="Section 1" class="your-active-class">
+      <div class="landing__container">
+        <h2>Section 1</h2>
+        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi fermentum metus faucibus lectus pharetra dapibus. Suspendisse potenti. Aenean aliquam elementum mi, ac euismod augue. Donec eget lacinia ex. Phasellus imperdiet porta orci eget mollis. Sed convallis sollicitudin mauris ac tincidunt. Donec bibendum, nulla eget bibendum consectetur, sem nisi aliquam leo, ut pulvinar quam nunc eu augue. Pellentesque maximus imperdiet elit a pharetra. Duis lectus mi, aliquam in mi quis, aliquam porttitor lacus. Morbi a tincidunt felis. Sed leo nunc, pharetra et elementum non, faucibus vitae elit. Integer nec libero venenatis libero ultricies molestie semper in tellus. Sed congue et odio sed euismod.</p>
+
+        <p>Aliquam a convallis justo. Vivamus venenatis, erat eget pulvinar gravida, ipsum lacus aliquet velit, vel luctus diam ipsum a diam. Cras eu tincidunt arcu, vitae rhoncus purus. Vestibulum fermentum consectetur porttitor. Suspendisse imperdiet porttitor tortor, eget elementum tortor mollis non.</p>
+      </div>
+    </section>
+    <section id="section2" data-nav="Section 2">
+      <div class="landing__container">
+        <h2>Section 2</h2>
+        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi fermentum metus faucibus lectus pharetra dapibus. Suspendisse potenti. Aenean aliquam elementum mi, ac euismod augue. Donec eget lacinia ex. Phasellus imperdiet porta orci eget mollis. Sed convallis sollicitudin mauris ac tincidunt. Donec bibendum, nulla eget bibendum consectetur, sem nisi aliquam leo, ut pulvinar quam nunc eu augue. Pellentesque maximus imperdiet elit a pharetra. Duis lectus mi, aliquam in mi quis, aliquam porttitor lacus. Morbi a tincidunt felis. Sed leo nunc, pharetra et elementum non, faucibus vitae elit. Integer nec libero venenatis libero ultricies molestie semper in tellus. Sed congue et odio sed euismod.</p>
+
+        <p>Aliquam a convallis justo. Vivamus venenatis, erat eget pulvinar gravida, ipsum lacus aliquet velit, vel luctus diam ipsum a diam. Cras eu tincidunt arcu, vitae rhoncus purus. Vestibulum fermentum consectetur porttitor. Suspendisse imperdiet porttitor tortor, eget elementum tortor mollis non.</p>
+      </div>
+    </section>
+    <section id="section3" data-nav="Section 3">
+      <div class="landing__container">
+        <h2>Section 3</h2>
+        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi fermentum metus faucibus lectus pharetra dapibus. Suspendisse potenti. Aenean aliquam elementum mi, ac euismod augue. Donec eget lacinia ex. Phasellus imperdiet porta orci eget mollis. Sed convallis sollicitudin mauris ac tincidunt. Donec bibendum, nulla eget bibendum consectetur, sem nisi aliquam leo, ut pulvinar quam nunc eu augue. Pellentesque maximus imperdiet elit a pharetra. Duis lectus mi, aliquam in mi quis, aliquam porttitor lacus. Morbi a tincidunt felis. Sed leo nunc, pharetra et elementum non, faucibus vitae elit. Integer nec libero venenatis libero ultricies molestie semper in tellus. Sed congue et odio sed euismod.</p>
+
+        <p>Aliquam a convallis justo. Vivamus venenatis, erat eget pulvinar gravida, ipsum lacus aliquet velit, vel luctus diam ipsum a diam. Cras eu tincidunt arcu, vitae rhoncus purus. Vestibulum fermentum consectetur porttitor. Suspendisse imperdiet porttitor tortor, eget elementum tortor mollis non.</p>
+      </div>
+    </section>
+  </main>
+  <footer class="page__footer">
+    <p>&copy Udacity</p>
+  </footer>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/projects/landing-page/js/app.js b/projects/landing-page/js/app.js
new file mode 100755
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+/**
+ * 
+ * Manipulating the DOM exercise.
+ * Exercise programmatically builds navigation,
+ * scrolls to anchors from navigation,
+ * and highlights section in viewport upon scrolling.
+ * 
+ * Dependencies: None
+ * 
+ * JS Version: ES2015/ES6
+ * 
+ * JS Standard: ESlint
+ * 
+*/
+
+/**
+ * Define Global Variables
+ * 
+*/
+
+
+/**
+ * End Global Variables
+ * Start Helper Functions
+ * 
+*/
+
+
+
+/**
+ * End Helper Functions
+ * Begin Main Functions
+ * 
+*/
+
+// build the nav
+
+
+// Add class 'active' to section when near top of viewport
+
+
+// Scroll to anchor ID using scrollTO event
+
+
+/**
+ * End Main Functions
+ * Begin Events
+ * 
+*/
+
+// Build menu 
+
+// Scroll to section on link click
+
+// Set sections as active
+
+
diff --git a/projects/weather-journal-app/README.md b/projects/weather-journal-app/README.md
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+# Weather-Journal App Project
+
+## Overview
+This project requires you to create an asynchronous web app that uses Web API and user data to dynamically update the UI. 
+
+## Instructions
+This will require modifying the `server.js` file and the `website/app.js` file. You can see `index.html` for element references, and once you are finished with the project steps, you can use `style.css` to style your application to customized perfection.
+
+## Extras
+If you are interested in testing your code as you go, you can use `tests.js` as a template for writing and running some basic tests for your code.
diff --git a/projects/weather-journal-app/commentsOnlyJS/app.js b/projects/weather-journal-app/commentsOnlyJS/app.js
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+// Personal API Key for OpenWeatherMap API
+
+// Event listener to add function to existing HTML DOM element
+
+/* Function called by event listener */
+
+/* Function to GET Web API Data*/
+
+/* Function to POST data */
+
+
+/* Function to GET Project Data */
diff --git a/projects/weather-journal-app/commentsOnlyJS/server.js b/projects/weather-journal-app/commentsOnlyJS/server.js
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+++ b/projects/weather-journal-app/commentsOnlyJS/server.js
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+// Setup empty JS object to act as endpoint for all routes
+// Express to run server and routes
+
+// Start up an instance of app
+
+/* Dependencies */
+/* Middleware*/
+
+//Here we are configuring express to use body-parser as middle-ware.
+// Cors for cross origin allowance
+
+// Initialize the main project folder
+
+// Spin up the server
+// Callback to debug
+
+// Initialize all route with a callback function
+
+// Callback function to complete GET '/all'
+
+// Post Route
+  
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diff --git a/projects/weather-journal-app/server.js b/projects/weather-journal-app/server.js
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+++ b/projects/weather-journal-app/server.js
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+// Setup empty JS object to act as endpoint for all routes
+projectData = {};
+
+// Require Express to run server and routes
+
+// Start up an instance of app
+
+/* Middleware*/
+//Here we are configuring express to use body-parser as middle-ware.
+app.use(bodyParser.urlencoded({ extended: false }));
+app.use(bodyParser.json());
+
+// Cors for cross origin allowance
+
+// Initialize the main project folder
+app.use(express.static('website'));
+
+
+// Setup Server
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diff --git a/projects/weather-journal-app/website/app.js b/projects/weather-journal-app/website/app.js
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+++ b/projects/weather-journal-app/website/app.js
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+/* Global Variables */
+
+// Create a new date instance dynamically with JS
+let d = new Date();
+let newDate = d.getMonth()+'.'+ d.getDate()+'.'+ d.getFullYear();
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diff --git a/projects/weather-journal-app/website/index.html b/projects/weather-journal-app/website/index.html
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+++ b/projects/weather-journal-app/website/index.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="UTF-8">
+<title>Weather Journal</title>
+<link href="https://fonts.googleapis.com/css?family=Oswald:400,600,700|Ranga:400,700&display=swap" rel="stylesheet">
+<link rel="stylesheet" href="style.css">
+</head>
+ <body>
+<div id = "app">
+  <div class ="holder headline">
+    Weather Journal App
+  </div>
+  <div class ="holder zip">
+    <label for="zip">Enter Zipcode here</label>
+    <input type="text" id="zip" placeholder="enter zip code here">
+  </div>
+  <div class ="holder feel">
+    <label for="feelings">How are you feeling today?</label>
+    <textarea class= "myInput" id="feelings" placeholder="Enter your feelings here" rows="9" cols="50"></textarea>
+    <button id="generate" type = "submit"> Generate </button>
+  </div>
+  <div class ="holder entry">
+    <div class = "title">Most Recent Entry</div>
+   <div id = "entryHolder">
+    <div id = "date"></div> 
+   <div id = "temp"></div>
+   <div id = "content"></div>
+  </div>
+  </div>
+  </div>
+<script src="app.js" type="text/javascript"></script>
+
+</body>
+</html>
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diff --git a/projects/weather-journal-app/website/style.css b/projects/weather-journal-app/website/style.css
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+++ b/projects/weather-journal-app/website/style.css
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+body{
+    background: #fffff8;
+    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
+}
+
+#app{
+    display: grid;
+    grid-auto-rows: minmax(150px, auto);
+    /* grid-template-columns:  */
+    height:100vh;
+    background: #f23557;
+    color: #f0d43a;
+    justify-content: center;
+    grid-gap: 1em;
+    font-size: 20px;
+    font-family: 'Oswald', sans-serif;
+}
+
+.holder{
+
+}
+
+.entry{
+    background: rgba(59, 74, 107, .4);
+}
+
+#entryHolder{
+
+}
+
+#date{
+
+}
+
+#temp{
+
+}
+
+#content{
+
+}
+
+.headline {
+
+}
+.title{
+
+}
+
+/*  Basic Styling To Override Default For Basic HTML Elements */
+label{
+    display:block;
+    font-size: 27px;
+}
+
+input{
+    display:block;
+    height: 60px;
+    width: 320px;
+    background:#22b2da;
+    color: #f0d43a;
+    font-size: 20px;
+    font-family: 'Oswald', sans-serif;
+    border: none;
+}
+
+button{
+    width: 400px;
+    height: 100px;
+    background: #3b4a6b;
+    color: #f0d43a;
+    font-size: 26px;
+    font-family: 'Oswald', sans-serif;
+    border: none;
+    box-shadow: 2px 4px 5px #444;
+}
+h1{
+    font-size: 36px;
+}
+
+textarea{
+    background:#22b2da;
+    color: #f0d43a;
+    font-size: 20px;
+    font-family: 'Oswald', sans-serif;
+}
+/* Reset style for HTML element on active to have no border*/
+input:focus,
+select:focus,
+textarea:focus,
+button:focus {
+    outline: none;
+}
+/* Style for Placeholder Text*/
+::placeholder { /* Firefox, Chrome, Opera */ 
+    color: #f0d43a; 
+    font-family: 'Oswald', sans-serif;
+
+} 
+  
+:-ms-input-placeholder { /* Internet Explorer 10-11 */ 
+    color: #f0d43a; 
+    font-family: 'Oswald', sans-serif;
+
+} 
+  
+::-ms-input-placeholder { /* Microsoft Edge */ 
+    color: #f0d43a; 
+    font-family: 'Oswald', sans-serif;
+
+} 
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diff --git a/resources/chrome-extension/allow-feedback.png b/resources/chrome-extension/allow-feedback.png
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diff --git a/resources/chrome-extension/instructions.md b/resources/chrome-extension/instructions.md
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+++ /dev/null
@@ -1,17 +0,0 @@
-### How to Load the Extension
-
-**1. Install the [Udacity Feedback Chrome Extension from the Chrome Web Store](https://chrome.google.com/webstore/detail/udacity-front-end-feedbac/melpgahbngpgnbhhccnopmlmpbmdaeoi) (it's free).**
-
-**2. Go to the Chrome extensions menu (chrome://extensions) and give the extension permission to run against file URLs.**
-
-![click this checkbox in the chrome extensions menu that says "allow access to file urls"](http://udacity.github.io/fend/resources/chrome-extension/settings.png)
-
-**3. To use the extension, open the webpage you want to edit, click on the extension icon, and check "Allow feedback on this domain":**
-
-![open the extension and click "allow feedback on this domain"](http://udacity.github.io/fend/resources/chrome-extension/allow-feedback.png)
-
-**4. As edits are made, changes are reflected in the Udacity Feedback dialogue box.** 😃
-
----
-
-Interested in learning more about the extension? [Click here](http://labs.udacity.com/udacity-feedback-extension/) for a walkthrough and more information!
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