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Featured Videos
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Not Right For WatchKnowLearn
Ages: 12 - 18
6770 Views:
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Drinking alcohol causes liver cells to build up globules of fat which turn into scar tissue on the liver. Learn how scar tissue prohibits the liver from doing its job in this clip with information from a science teacher. (01:44)
April 15, 2010 at 10:10 AM
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Not Right For WatchKnowLearn
Ages: 11 - 18
7308 Views:
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In this video Sal Khan discusses how to convert units of length. The problem in this eight-minute video is this:
Jamir is training for a race and is running laps around a field. If the distance around a field is 300 yards, how many corporate laps w...ould he need to run at least 2 miles? (08:03)
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September 5, 2010 at 10:42 AM
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Not Right For WatchKnowLearn
Ages: 12 - 18
3269 Views:
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In which John Green teaches you about founding father and third president of the United States, Thomas Jefferson. Jefferson is a somewhat controversial figure in American history, largely because he, like pretty much all humans, was a big bundle of c...ontradictions. Jefferson was a slave-owner who couldn't decide if he liked slavery. He advocated for small government, but expanded federal power more than either of his presidential predecessor. He also idealized the independent farmer and demonized manufacturing, but put policies in place that would expand industrial production in the US. Controversy may ensue as we try to deviate a bit from the standard hagiography/slander story that usually told about old TJ. John explores Jefferson's election, his policies, and some of the new nation's (literally and figuratively) formative events that took place during Jefferson's presidency. In addition to all this, Napoleon drops in to sell Louisiana, John Marshall sets the course of the Supreme Court, and John Adams gets called a tiny tyrant. (13:19)
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April 14, 2013 at 04:38 PM
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Not Right For WatchKnowLearn
Ages: 12 - 18
4441 Views:
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Newsreel footage of President Truman's first inaugural address on January 20, 1949. (17:55)
March 26, 2009 at 09:21 PM
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Not Right For WatchKnowLearn
Ages: 6 - 11
9234 Views:
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In this Cyberchase video segment, Harley convinces Harry to help put up a fence in their grandmother's backyard. With no instructions other than to put up the fence in the shape of a rectangle, Harry must figure out how to do this with different leng...ths of fencing. He breaks the problem down by adding up different combinations of pieces and then drawing a diagram to figure out where to place the pieces. (3:25)
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February 20, 2012 at 08:28 AM
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Not Right For WatchKnowLearn
Ages: 11 - 18
3652 Views:
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Watch and learn from the artist's drawing. No narration. (03:12)
August 17, 2009 at 04:39 PM
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