http://www.c-span.org/classroom/
Discovery
Channel School
http://school.discovery.com/
http://school.discovery.com/
Learning
Channel
http://www.learningchannel.com/
The
Weather Channel
http://www.weather.com
http://www.weather.com
http://www.courttv.com/
http://www.pbs.org/kids/
Scientific
American Frontiers
http://www.pbs.org/saf/
http://www.startrek.com/