Web Accessibility Standards for the Disabled
Although there are many diverse standards for web accessibility, by law all public organizations (including universities) must meet the Section 508 standards for accessibility.
Free Section 508 automated testing tools
http://wave.webaim.org
http://www.cynthiasays.com
Section 508 checklist for your web site
http://webaim.org/standards/508/checklist
http://webaim.org/standards/508/508checklist.pdf
Section 508 of the US Rehabilitation Act
http://www.section508.gov