NYPL: Style Guide explains XHTML guidelines and benefits and offers CSS tips.
Accessiblity Site
Knowbility, Inc. Knowbility promotes barrier free Information Technology – creating greater access to I.T. opportunities for youth and adults with disabilities.
Organization for HTML writers
The HTML Writers Guild recently merged with the International Webmaster Association. Online classes and other resources.
UNESCO Teacher Training Site
ICT for Teacher Training Portal. The Information and Communication Technology Portal (ICT) for Teacher Training is the gateway to Internet resources and websites dedicated to training teachers in utilizing information and communication technologies to enhance their teaching skills.
W3C tutorial on XHTML modules
IE 6 and CSS compliance
HTML Tip: New Headaches with IE 6 on NetMechanic site explains how Internet Explorer 6 interprets your style sheets.
Web Page Design for Designers
Joe Gillespie’s site on design topics, tutorials, tools, and the Web in general. He has some nice pixel fonts, too. Updated monthly. wpdfd.com.