HTML Interactive Websites for Beginners

The technology Texas Essential Knowledge and Skills (TEKS) for grades 6-8 specifies that students must use terminology related to the Internet appropriately including, but not limited to, electronic mail (e-mail), Uniform Resource Locators (URLs), electronic bookmarks, local area networks (LANs), wide area networks (WANs), World Wide Web (WWW) page, and HyperText Markup Language (HTML).

I found the following interactive websites extremely helpful in learning the main HTML tags.
http://www.quia.com/jg/65619.html
http://www.funbrain.com/html/index.html
http://www.quia.com/jq/19638.html

However, I need a lot more practice with learning the language of the Internet. What other websites are helpful in learning hyper text markup language?