I was learning HTML and CSS back during winter break so I could learn how to make websites and design layouts and stuff, and I was using W3schools until I realized that it really didn't explain a lot.
First, it left a lot of information missing on really important things, like how to create page layouts and such. Additionally, it didn't bother to address things like making your website accessible to people who don't use a mouse or are screen readers.
So yeah, someone referred me to HTMLDog and it cleared up everything. It even actually has useful examples for layouts and how to create things. Use it.
http://htmldog.com/
