There are countless resources available on accessible web design.  Listed below are some that are available.  There are probably others not listed that are just as good, perhaps better.  Those listed below are fairly representative of what is available.

When you look at resources on accessible web design, always check for references to the Web Accessibility Initiative (WAI) guidelines.

Note: In the final resource, links will open in a new window.

Everyone Online – Tutorial

Australian Flexible Learning Framework

http://www.flexiblelearning.net.au/accessequity/aboutus/aboutus.htm

Choose the online tutorial for tips and techniques for designing accessible online learning.  This is a clearly laid-out, easy to follow tutorial designed to show managers and practitioners some simple techniques they can use to design and develop accessible e-learning products.  It includes demonstrations on why certain access features are important.

Web Accessibility 101 – policy, Standards and Design Techniques

DoIT (Division of Information Technology, University of Wisconsin-Madison)

http://www.doit.wisc.edu/accessibility/online-course/index.htm

This is a comprehensive, free online course designed for the University environment.

Jim Thatcher.com

http://www.jimthatcher.com/webcourse1.htm

This is a short online course in accessible web design.  Contents include: 

• Text Alternatives

• Check Accessibility

• Navigation

• Image maps

• Audio & Multimedia

• Special Cases

• Accessible Forms

• Accessible Tables

• Scripts and Applets

• Style Sheets

• Online Resources