Code Academy

Code Academy is an excellent website where you can work at your own pace to learn HTML/CSS. You can go as far as you like, from learning the basics to creating and styling your own social network profile page.

It is extremely important that you read all of the instructions on the left handside of the tutorials. Do not be afraid to try out any ideas and code that you have found else where.

Enjoy!

http://www.codecademy.com/tracks/web