Free Streaming Video Clips From PBS for Teachers

I remember watching NOVA videos all the time in science and social studies classes. And there's a reason this program is a perennial favorite among teachers--it's well produced, informative and (though some seventh-graders may beg to differ) entertaining.

Now, full-length programs (1-3 hours, divided into chapters) are available free online.

Besides full-length programs, there are short (5-15 minute) news magazine type pieces, and 2-4 minute program previews.

Nearly 25 videos (not counting previews).

Either Quicktime or Real Player is required to view videos. As with all web-based video, a high-speed internet connection is required for optimal viewing, though different streaming options are available depending on your connection speed.

Closed captions, program transcripts and lesson plans make it easy to access information and use the videos in the classroom.

There is no way to download or save the programs. It would be impractical and uncomfortable to try to get a whole class around one computer screen, but these streaming videos could be effectively used in settings where each student has access to his own computer.

• The Twin Prime Conjecture stars a lounge singer, mathematicians, and a centuries-old puzzle.

• A respected scientist explains why The Blob was the most realistic alien movie to ever come out of Hollywood.

Animal, nature, and culture videos from National Geographic.