Featured Videos

Not Right For WatchKnowLearn
Ages: 9 - 18
Subtraction with Zeros
From YouTube
Instructor uses manipulatives, math numbers, and a green marker to illustrate how to subtract when there is more than one zero in the top number. Suitable for grades 3rd and up.  (Note to teachers: The finder's problem with this video is that, whi... [more]
September 28, 2009 at 01:31 PM
Not Right For WatchKnowLearn
Ages: 7 - 10
Subtraction 3: Introduction to Borrowing or Regrouping - Khan Academy
From YouTube, produced by Sal Khan
In this video, the instructor uses a graphics program to review how to subtract numbers and introduces how to re-group or borrow. The instructor also uses a number line. The video is suitable for elementary students. (18:26)
January 27, 2010 at 02:51 AM
Not Right For WatchKnowLearn
Ages: 7 - 12
The Photosynthesis Song
From YouTube
This is a short (under two minutes) video that has a catchy song by Peter Weatherall about photosynthesis.
April 17, 2010 at 05:44 PM
Not Right For WatchKnowLearn
Ages: 8 - 14
Water Cycle Rap Song
From YouTube, produced by Discovery
A rap about the Earth's water cycle. The song raps about rain, evaporation, and condensation. The music video is from a Bill Nye episode on water.  (01:30)
July 17, 2009 at 01:05 PM
Not Right For WatchKnowLearn
Ages: 6 - 10
Using Addition to Check a Subtraction Problem with 3-Digits
From eduplace.com, produced by Houghton Mifflin
Students will learn to use addition (the opposite of subtraction) to check the difference.  If the sum of the addition problem equals the number you subtracted from, then the answer is correct.  User clicks through the slides. Uses metacognitive stra... [more]
May 20, 2010 at 03:31 PM