fixing typos in chapter 3

3-terrarium/1-intro-to-html/assignment.md

@@ -2,7 +2,7 @@
 
 ## Instructions
 
-Imagine you are designing, or redesigning, your personal web site. Create a graphical markup of your site, and then write down the HTML markup you would use to build out the various elements of the site. You can do this on paper, and scan it, or use software of your choice, just make sure to hand-code the HTML markup.
+Imagine you are designing, or redesigning, your personal web site. Create a graphical mockup of your site, and then write down the HTML markup you would use to build out the various elements of the site. You can do this on paper, and scan it, or use software of your choice, just make sure to hand-code the HTML markup.
 
 ## Rubric
 

3-terrarium/2-intro-to-css/README.md

@@ -61,7 +61,7 @@ Styles are inherited from an ancestor style to a descendent, such that nested el
 
 Set the body's font to a given font, and check to see a nested element's font:
 
-```
+```CSS
 body {
 	font-family: helvetica, arial, sans-serif;
 }
@@ -81,7 +81,7 @@ Open your browser's console to the 'Elements' tab and observe the H1's font. It
 
 So far, your `style.css` file has only a few tags styled, and the app looks pretty strange:
 
-```
+```CSS
 body {
 	font-family: helvetica, arial, sans-serif;
 }
@@ -98,7 +98,7 @@ This way of styling a tag gives you control over unique elements, but you need t
 
 Add some style to layout the left and right containers. Since there is only one left container and only one right container, they are given ids in the markup. To style them, use `#`:
 
-```
+```CSS
 #left-container {
 	background-color: #eee;
 	width: 15%;
@@ -142,7 +142,7 @@ Notice that each plant in the HTML markup has a combination of ids and classes.
 
 Add the following to your `style.css` file:
 
-```css
+```CSS
 .plant-holder {
 	position: relative;
 	height: 13%;
@@ -189,7 +189,7 @@ Now you will use what you learned to build the terrarium itself, all using CSS!
 
 First, style the `.terrarium` div children as a rounded rectangle using CSS:
 
-```css
+```CSS
 .jar-walls {
 	height: 80%;
 	width: 60%;

3-terrarium/3-intro-to-DOM-and-closures/assignment.md

@@ -2,7 +2,7 @@
 
 ## Instructions
 
-Research the DOM a little more by 'adopting' a DOM element. Visit the MSDN's [list of DOM interfaces](https://developer.mozilla.org/en-US/docs/Web/API/Document_Object_Model) and pick one. Find it being used on a web site in the web, and write an explanation of how it is used.
+Research the DOM a little more by 'adopting' a DOM element. Visit the MSN's [list of DOM interfaces](https://developer.mozilla.org/en-US/docs/Web/API/Document_Object_Model) and pick one. Find it being used on a web site in the web, and write an explanation of how it is used.
 
 ## Rubric