NASA TV

The National Aeronautics and Space Administration network airs a large amount of educational programming, and provides live coverage of an array of manned missions, including the Space Shuttle and International Space Station, robotic missions, and international launches.  NASA TV provides live coverage of missions and other agency events as well as resources for news media, educators and students, and the general public.

http://www.nasa.gov/multimedia/nasatv/#.VByn0Up_sft