I Just finished a course in xhtml at Sheridan  taught by Dan Zen. It was a continuing Education class called "Creating Web Pages HTML and XHTML Authoring Introduction.

The course was great as I now have a basic understanding of tags, preferences, tables and the exposure to Dreamweaver was fantastic.

The instructor Dan Zen is a professor in the Interactive Multimedia/Web Design area and his teaching style was very relaxed and (for lack of a better word) "fun"

The cost of the course was $400.00 and a Text book was included 'Web Publishing with HTML and XHTML' 

If your looking for  HTML enlightenment, this is the ticket to ride.