I would argue that http://htmldog.com/ or the MDN (https://developer.mozilla.org/en-US/) are much better resources for even the newbie. Correct information always trumps easily accessible information. It isn't like the MDN is hard to navigate or anything, anyways.

For comparison sake:

https://developer.mozilla.org/en-US/docs/HTML/Element/articl...

http://www.w3schools.com/tags/tag_article.asp

With the exception of the "try it yourself" link, the MDN page has everything the W3School's page has, and then some, as well as being more accurate as it contains version numbers, links to the spec, as well as related usage notes.