This was written for teachers to help them create learning resources for the internet but it can be used by anyone. Isn't that kind of what we do?
Resources from the HTML Writer's Guild.
Sponsored by the University of Toronto it provides information on HTML, URLs, DTDs, SGML, CGI, and HTTP.
Excellent Links and references to resources related to web programming and HTML including tutorials, validators, HTML editors, and much more.
An online guide or offline guide to HTML.
Provides information about the various versions, structures of HTML and describes some of the changes. This is the best HTML reference on the internet.
An online introduction to HTML.
A good starting point on the path to understanding HTML.
Explains HTML tags.