Project Ideal - great information on special education. Completed modules include disability categories, attitudes about special education and classroom management, which actually applies to all classrooms.
LD Online. Great site to find more about learning differences. Video of an ARD on homepage.
The Iris Center contains modules presented along the Star Legacy model, case studies, activities, information briefs and podcasts relating to different topics in special education and education of ELL's.
This site is owned by two lawyers who specialize in laws relating to special education issues.
The American Library Association's site for Learning Disabilities Initiative. It contains general information as well as governing documents about special education.