diff --git a/3-terrarium/1-intro-to-html/README.md b/3-terrarium/1-intro-to-html/README.md
index fabf656e..167ff4a2 100644
--- a/3-terrarium/1-intro-to-html/README.md
+++ b/3-terrarium/1-intro-to-html/README.md
@@ -1,6 +1,6 @@
# Terrarium Project Part 1: Introduction to HTML
-
+
> Sketchnote by [Tomomi Imura](https://twitter.com/girlie_mac)
## Pre-Lecture Quiz
@@ -48,13 +48,13 @@ Add these lines at the top of your `index.html` file:
```
-✅ There are a few different modes that can be determined by setting the DocType with a query string: [Quirks Mode and Standards Mode](https://developer.mozilla.org/en-US/docs/Web/HTML/Quirks_Mode_and_Standards_Mode). These modes used to support really old browsers that aren't normally used nowadays (Netscape Navigator 4 and Internet Explorer 5). You can stick to the standard doctype declaration.
+✅ There are a few different modes that can be determined by setting the DocType with a query string: [Quirks Mode and Standards Mode](https://developer.mozilla.org/docs/Web/HTML/Quirks_Mode_and_Standards_Mode). These modes used to support really old browsers that aren't normally used nowadays (Netscape Navigator 4 and Internet Explorer 5). You can stick to the standard doctype declaration.
---
## The document's 'head'
-The 'head' area of the HTML document includes crucial information about your web page, also known as [metadata](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/meta). In our case, we tell the web server to which this page will be sent to be rendered, these four things:
+The 'head' area of the HTML document includes crucial information about your web page, also known as [metadata](https://developer.mozilla.org/docs/Web/HTML/Element/meta). In our case, we tell the web server to which this page will be sent to be rendered, these four things:
- the page's title
- page metadata including:
@@ -75,7 +75,7 @@ Add a 'head' block to your document in between the opening and closing ``
```
-✅ What would happen if you set a viewport meta tag like this: ``? Read more about the [viewport](https://developer.mozilla.org/en-US/docs/Mozilla/Mobile/Viewport_meta_tag).
+✅ What would happen if you set a viewport meta tag like this: ``? Read more about the [viewport](https://developer.mozilla.org/docs/Mozilla/Mobile/Viewport_meta_tag).
---
@@ -213,7 +213,7 @@ Add this markup above the last `` tag:
## 🚀Challenge
-There are some wild 'older' tags in HTML that are still fun to play with, though you shouldn't use deprecated tags such as [these tags](https://developer.mozilla.org/en-US/docs/Web/HTML/Element#Obsolete_and_deprecated_elements) in your markup. Still, can you use the old `