diff --git a/HTML5.md b/HTML5.md
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--- a/HTML5.md
+++ b/HTML5.md
@@ -11,7 +11,7 @@ HTML5 is what makes up web pages, and since a Chrome application consists of web
Let's look at XML syntax first.
An XML document is a file, that contains structured information. The structure is defined by using the following characters that have special meaning in XML:
-```XML
+```
< > / " = & # ;
```
###Elements
diff --git a/course/html5/description.md b/course/html5/description.md
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@@ -0,0 +1,58 @@
+---
+layout: page
+title: HTML5
+---
+##What is it?
+HTML5 is an abbreviation that stands for Hyper Text Markup Language version 5.
+
+It is an extension to XML; eXtensible Markup Language.
+
+##Why should I care?
+HTML5 is what makes up web pages, and since a Chrome application consists of web pages, we need to know how to create HTML5 content.
+
+Let's look at XML syntax first.
+
+An XML document is a file, that contains structured information. The structure is defined by using the following characters that have special meaning in XML:
+
+ < > / " = & # ;
+
+###Elements
+The `<` and `>` characters are used to define *elements*.
+
+An element can either have content, or be empty.
+
+An empty element must start with `<` and end with `/>`. In between is the name of the element and maybe some *attributes*, we'll get back to those.
+
+```ruby
+require 'redcarpet'
+markdown = Redcarpet.new("Hello World!")
+puts markdown.to_html
+```
+
+
+
+The word `html` is the name of the element. An element in XML can have any name.
+
+An element with content must first have a *start-tag* that starts with `<` and ends with `>`, then comes the content, which can be text, or other elements, and then at the end comes the *end-tag*, which starts with ``.
+
+
+ Some content
+
+
+An element can have any number of *child-elements*, which can again have child-elements to any level of nexting you want.
+
+