Very cool. Like the site. The one thing I noticed is that you put "Codeacademy" but they really spell it "Codecademy", with no leading "A" in academy.

You should have links to webplatform.org - this is a varied collection of docs and tutorials contributed by browser vendors and other key web players, via the W3C.

I would recommend adding HTML5 Doctor http://html5doctor.com/ as they do a very good job of explaining the specific use cases of the semantic elements in html5 which is something many people either overlook or they use incorrectly. I really like it!