Part of the challenge for teachers in using educational videos in their classrooms is finding just the right ones. After all, with the huge amounts of video being produced from a variety of sources , just finding quality stuff can be like looking for the proverbial needle-in-a-haystack.

This summer I was introduced to WatchKnow, a non-profit organization whose goal is to locate, index and offer free online educational resources for teachers and students. WatchKnow is run by a group of educators led by Wikipedia co-founder Dr. Larry Sanger. While they don’t own rights to the videos they share or necessarily host the videos on their own site, the strength of WatchKnow results from the power of a community who act as a filter and conduit all in one.

WatchKnow now sports over 15,000 videos from a variety of sources, cataloged and searchable by subject area and other filters. As a user, they also welcome teachers to add their own favorite videos you find on-line, sharing your finds with colleagues from around the world.

Best of all, the price is right.

Free!