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Ages: 14 - 18
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Optimization with Calculus 1 - Khan Academy
From YouTube, produced by Salman Khan
Find two numbers whose products is -16 and the sum of whose squares is a minimum. (9:50)
June 16, 2012 at 09:55 PM
Not Right For WatchKnowLearn
Ages: 7 - 12
1539 Views:
Weather & Meteorology : What Causes Lightning?
From YouTube, produced by eHow
As clouds get bigger with the continuous rising of air, they interact with particles of ice and dirt to create a buildup of static electricity. Learn about the interaction of electrical charges in a cloud with charges on the ground with help from a m... [more]
Found by Barb in Storms
August 12, 2009 at 06:54 PM
Not Right For WatchKnowLearn
Ages: 3 - 8
1220 Views:
Phonics (Rhyming Words)
From YouTube, produced by Beansnfrank.com
This is a rap song about rhyming words.  The rhythm is easy for younger learners to mimic.  Many different sounds are featured. The words appear on the screen as the characters sing and dance along.  (02:28)
Found by utvol in Rhyming
September 24, 2012 at 12:26 AM
Not Right For WatchKnowLearn
Ages: 7 - 18
3942 Views:
Pronouns
From vimeo.com, produced by Readezz
This super cute, professionally made video gives you examples of subject, object, and possessive pronouns. (1:15)
February 4, 2011 at 12:22 AM
Not Right For WatchKnowLearn
Ages: 7 - 18
4041 Views:
A Trip from the Earth to the Edge of the Known Universe
From YouTube, produced by American Museum of Natural History
This very well-made video, created by the American Museum of Natural History under the title "The Known Universe," takes viewers on an imaginary journey from the Himalayas through our atmosphere and the inky black of space to the afterglow of the Big... [more]
January 2, 2010 at 10:34 PM
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