Ask community leaders for the names of people who are blind, have limited visual acuity [macular degeneration, colorblindness, etc.], are deaf, or have limited motor skills and use assistive technologies.
Invite those people to your classroom.
Record the session.
Caption the video and post it on You Tube or Google Video
Sec. 504.(a) No otherwise qualified individual with a disability in the United States … shall, solely by reason of her or his disability, be excluded from the participation in, be denied the benefits of, or be subjected to discrimination under any program or activity receiving Federal financial assistance …
(b) For the purposes of this section, the term "program or activity" means all of the operations of …
(2)(A) a college, university, or other postsecondary institution, or a public system of higher education; or
(B) a local educational agency (as defined in section 14101 of the Elementary and Secondary Education Act of 1965), system of vocational education, or other school system;
A text-only page, with equivalent information or functionality, shall be provided to make a web site comply with the provisions of this part, when compliance cannot be accomplished in any other way. The content of the text-only page shall be updated whenever the primary page changes.
When pages utilize scripting languages to display content, or to create interface elements, the information provided by the script shall be identified with functional text that can be read by assistive technology.
When a web page requires that an applet, plug-in or other application be present on the client system to interpret page content, the page must provide a link to a plug-in or applet that complies with §1194.21(a) through (l).
When electronic forms are designed to be completed on-line, the form shall allow people using assistive technology to access the information, field elements, and functionality required for completion and submission of the form, including all directions and cues.
Web Accessibility Principles by Zoe Gillenwater ISBN: 1-5961-395-X Online training movies at Lynda.com $49.95 for CD / accessible online with a Lynda.com account Full disclosure: I am a Lynda.com author