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Not Right For WatchKnowLearn
Ages: 8 - 14
Alternate Mental Subtraction Method
From YouTube, produced by Sal Khan
In this video, the instructor explains how he uses mental math to subtract two four-digit numbers. In an easy conversational tone, the instructor uses the computer screen as his 'blackboard' and different colors to emphasis his points. This video is ... [more]
January 23, 2010 at 03:12 PM
Not Right For WatchKnowLearn
Ages: 12 - 18
One Day on Earth - Trailer
From vimeo.com, produced by Vimeo/onedayonearth.org/screening
This 2:22 preview provides a great many short images of the many different cultures and geography of the world with film taken on the same day. A good way to get students to understand how diverse the planet is and the photography is impressive. This... [more]
April 22, 2012 at 03:50 PM
Not Right For WatchKnowLearn
Ages: 7 - 18
Leafcutter Ants - The First Agriculture
From YouTube
This documentary video is suitable for older elementary, middle school, and high school students and focuses on a colony of leafcutter ants. Run time 06:49.
August 7, 2009 at 02:34 PM
Not Right For WatchKnowLearn
Ages: 11 - 16
Finding the Perimeter of Polygons
From YouTube, produced by Math Made Easy
In this video, the instructor (who goes by the name jediteacher2007) shows several polygons (many-sided figures like hexagons and pentagons), and how to measure the distance around them (perimeter). The instructor uses computer software for instructi... [more]
February 10, 2010 at 08:13 PM
Not Right For WatchKnowLearn
Ages: 3 - 6
Sesame Street: Barbara Bush and Peter's Chair
From YouTube, produced by Sesame Street
In this video Barbara Bush reads a story book aloud. It's called Peter's Chair by Ezra Jack Keats. Run time 04:25.
July 16, 2010 at 12:50 PM