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Featured Videos
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Not Right For WatchKnowLearn
Ages: 14 - 18
3179 Views:
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In this video, the instructor, 'Chemguy', teaches about branches on aliphatics. This video is suitable for high school chemistry students.
January 7, 2010 at 01:02 AM
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Not Right For WatchKnowLearn
Ages: 10 - 18
3721 Views:
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It was Morgan's experience while driving along the streets of Cleveland that led to his invention of a traffic signal device.The first American-made automatic traffic light. (professional video) (03:40)
May 14, 2010 at 08:56 AM
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Not Right For WatchKnowLearn
Ages: 9 - 18
5476 Views:
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The entire lifecycle of the Monarch butterfly from a tiny caterpillar
hatching from an egg on a Milkweed leaf, to each shedding of the caterpillar's skin, which marks a new life stage called an "instar, to "pupation," which is the metamorphosis to ...become a adult butterfly. Filmed utilizing high powered microscopic cameras and time-lapse photography, with no speaking, just music and captions. Produced for the Chicago Nature Museum in Chicago, IL. (04:33)
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May 24, 2012 at 11:10 PM
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Not Right For WatchKnowLearn
Ages: 7 - 18
4628 Views:
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Bobby McFerrin demonstrates the power of the pentatonic scale, using audience participation, at the event “Notes & Neurons: In Search of the Common Chorus,” from the 2009 World Science Festival.
Very fun video to watch. Could be used in music clas...ses as well as to introduce how our brains are "programmed." (03:05)
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December 22, 2011 at 11:35 PM
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Not Right For WatchKnowLearn
Ages: 9 - 16
5171 Views:
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From DragonflyTV. Aaron and Tevi are really into exploring the science of places like the Egyptian pyramids and England's Stonehenge. They wanted to figure out how one man moved all of the massive stones to make Coral Castle. They knew he used simple... tools so they built a similar set-up, using a fulcrum and lever. Then they built a tripod with a block and tackle system (pulley), also based on the original design, to see if it could lift the huge limestone blocks off the ground. The video/experiment is a great example of problem solving and the scientific method.
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August 18, 2010 at 09:13 PM
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Not Right For WatchKnowLearn
Ages: 12 - 16
4305 Views:
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Students learn that the circumference of a circle is the distance around the circle, and the formula for the circumference of a circle is 2 times pi times the radius of the circle. Pi is the ratio of the circumference to the radius, which is approxim...ately 22/7 or 3.14. (02:27)
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August 12, 2009 at 04:38 PM
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