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Not Right For WatchKnowLearn
Ages: 9 - 14
Understanding Decimal Place Value
From eHow, produced by eHow
This short video is from Jimmy Chang, who has a master's degree in math and has been a math teacher at St. Pete College for more than eight years.  He explains decimal place value.
July 17, 2009 at 11:08 AM
Not Right For WatchKnowLearn
Ages: 11 - 18
Poisoned Waters:  Why Is Stormwater Runoff a Major New Threat?
From teachersdomain.org, produced by PBS
More than three decades after the Clean Water Act, iconic American waterways like the Chesapeake Bay and Puget Sound are in perilous condition and facing new sources of contamination. In this special collection of educational resources from FRONTLINE... [more]
November 1, 2010 at 08:42 PM
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