This instructor in this video, Sal Khan, discusses how to solve this problem: Show 109 percent by shading the squares.

Mr. Khan uses computer software (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. The viewer may want to open the video to 'full screen' as the instructor fits a lot of information on a dark screen. (02:22)

This instructor in this video, Sal Khan, discusses how to solve this problem: Shade 20 percent of the square.  Mr Khan discusses what the word 'percent' means.

Mr. Khan uses computer software (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. The viewer may want to open the video to 'full screen' as the instructor fits a lot of information on a dark screen. (03:01)

This instructor in this video, Sal Khan, discusses how to solve this problem: 78 is 15 percent of what number?

Mr. Khan uses computer software (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. The viewer may want to open the video to 'full screen' as the instructor fits a lot of information on a dark screen. (05:26)

This instructor in this video, Sal Khan, discusses how to solve this problem: 100 is what percent of 80?

Mr. Khan uses computer software (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. The viewer may want to open the video to 'full screen' as the instructor fits a lot of information on a dark screen. (04:37)

This instructor in this video, Sal Khan, discusses how to solve this problem: 150 is 25 percent of what number?

Mr. Khan uses computer software (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. The viewer may want to open the video to 'full screen' as the instructor fits a lot of information on a dark screen. (06:17)

A general celebration of (advanced) mathematics in song. Video consists simply of words on the screen. Tom Lehrer penned many humorous songs like this. (01:42)

Catchy song with slide show. Covers some of the basic terminology of math. Would make a good introduction to a math class at the beginning of the year.  (2:09).

Letters C, E, F, N, P, R, V, W, X, and Z and their sounds. Visual examples of each letter include action.  For example, "z" zipper shows a zipper being zipped.   (1:17)

A simple but concise description of how a bill becomes a law (in the U.S. federal legislative system). (3:01)

Video that uses Maria from The Sound of Music to show good teaching practices. Run time 06:05.

India Arie sings the ABC's with Elmo. (2:11)

Originally meant to be a prelude introduction to a episodic war cartoon, functions like an old time newsreel depicting events leading up to World War II.

A well-done video animation of the famous Eric Carle book about a caterpillar who eats and eats and then turns into a butterfly. Carle's artwork fill the screen, and a male narrator with a British accent reads the story.  Includes music, sound effects.  (6:12)

In this movie learn about the humble Baptist preacher Dr. Martin Luther King Jr. and how he influenced changes in U. S. laws concerning civil rights.

Video starts with video of various tornadoes.  About 800 twisters sweep through America in a year.  Video shows where the tornadoes are the most occurring and how they form from the meeting of warm and cold air.  With graphics they show are they are formed.  Video also goes through safety measures when a tornado warning is issued.  Also, shows tornado chasers and what they do.  Video is good quality and has good information.  Good for elementary grade and middle school students.

In this video, the instructor discusses complementary and supplementary angles. Definitions of each are given with examples modeled.  The instructor uses computer software for instruction. Clear, step-by-step instruction. (NOTE: When dealing with angles, the instructor should use the word complementary not complimentary.)

This is a brief explanation/overview of functions in Calculus. The video explains what critical points are in a function.

Function Inverse Example 2: f(x)= (x + 2) squared +1
This is a another installment of Mr. Khan's short 4-part series on Function Inverses. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. The screen gets busy (and dark)--the viewer may want to open to 'full screen' to see everything. The sound is a little low. (07:12)

For each choice of independent variable x, there is one and only one corresponding value of dependent variable y. This is a very brief overview. (01:17)

Tom Pittman, President of the Community Foundation of Northwest Mississippi, describes WatchKnow.org to viewers on ABC 24 Memphis, TN. Run time 04:36.