Here are some great websites to help students and teachers:
Sites for Teachers - List of the best teacher's resource and educational websites on the net.
4teachers.org - Free from University of Kansas Center for Research on Learning.
UnitedStreaming - Discovery Education provides 50,000 content-specific segments from 5,000 full-length educational videos.
Higher Ed & Distance Ed Resources - A Resource for Teachers, Students and Curious Adults.
MarcoPolo - Providing the highest quality Internet content and professional development to teachers and students.