The American Association for Artificial Intelligence (AAAI) is a nonprofit
scientific society devoted to advancing the scientific understanding of the
mechanisms underlying thought and intelligent behavior and their embodiment
in machines. 

This is a special web site provided by the AAAI for students, teachers,
journalists, and everyone who would like to learn about what artificial
intelligence is, and what AI scientists do. 
http://www.aaai.org/Pathfinder/

Assistive Technologies subtopic:
http://www.aaai.org/Pathfinder/html/assist.html