Multiplication Facts for the 5s
Set to music, students will have the five times table memorized in no time. Equations appear, one at a time, on a slide with black background. Â Singer chants the equations. Â  Repeats facts several times. Â (4:21)
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Multiplication Facts for the 6s
Set to music, elementary students will have the six times table memorized in no time. Equations appear one by one on a slide with a black background. Adult chants the equations and group responds with the answer. Repeats several times. The between the repetitions are a bit strange. (7:38)
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In this video, the instructor showsÂ how to solve a simple quadratic equation without a linear term. He uses paper and pen to model examples. Â This is an amateur production (a little blurry), but understandable.
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In this video, the instructor offersÂ an overview ofÂ quadratic equations. This is an amateur production, but understandable. The sound quality is good. (05:05)
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Acute, Obtuse and Right Angles Song
To a rocking tune of Old McDonald Had a Farm, this video features students singing a simple song that teaches acute, obtuse, and right angles. Students form the angles with their hands.  (01:04)
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Angles
This is a rap song about angles.  The song explains acute, right, and obtuse angles.  The animations of the angles are clear.  This would be a fun introduction to angles. (01:56)
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How to Factor a Trinomial with a Greatest Common Factor
Teacher works through an example of factoring a trinomial with a greatest common factor. He standing in front of and using a whiteboard. Sample video lesson-the complete lesson is at yourteacher.com -solves one equation.(2:14)

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Factoring Trinomials
Illustrates the steps for factoring a trinomial through writing on basic text slides. Many examples given. Although not very exciting, it would make a good tutorial for a student who is struggling with homework. Grades 8-12. 29:27 min.
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Introduction to Factoring Trinomials - Yay Math
Removing common factors and using FOIL to reverse engineer trinomials to find the factors. White board in a class setting, some interaction, engaging, several examples of increasing complexity. The discussion is clear and understandable. Preview - full version at http://video.google.com/videoplay?docid=5372924760957296665&q=source:012956945238798337823&hl=en Produced by Robert Ahdoot, yaymath.org
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Perfect Square Factoring and Square Root Property - Yay Math
Factoring Perfect Square Polynomials, as well as solving equations using the Square Root. White board in a class setting, some interaction, engaging, several examples of increasing complexity. The discussion is clear and understandable. Preview - full version at http://video.google.com/videoplay?docid=-2174037250498841062&q=source:012956945238798337823&hl=en Produced by Robert Ahdoot, yaymath.org
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The FOIL Method - Multiplying Binomials
Students learn to multiply two binomials together using the F.O.I.L. method: First, Outer, Inner, Last. For example, to simplify (2x + 3)(x -- 5), take the product of the First terms, which is 2x^2, plus the product of the Outer terms, which is --10x, plus the product of the Inner terms, which is +3x, plus the product of the last terms, which is --15. So the problem reads 2x^2 -- 10x + 3x -- 15. Finally, combine the like terms --10x + 3x, to get --7x, so the final answer is 2x^2 -- 7x -- 15.
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How to Determine the Circumference and Area of a Circle
Learn how to determine the area and circumference of a circle in this seven-minute tutorial. The teacher uses computer software for instruction.
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Calculus Functions
This is a brief explanation/overview of functions in Calculus. The video explains what critical points are in a function.
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Matrix Multiplication (Part 1) - Khan Academy
The instructor demonstrates how to multiply two 2 x 2 matrices. Mr. Khan uses a software program (emphasizing with different colors) to illustrate his points. The student or educator may want to open the video to 'full screen' as the instructor is using a black background and the writing is small. (13:40)
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Matrix Multiplication (Part 2) - Khan Academy
The instructor uses an electronic chalkboard to demonstrate Matrix Multiplication.  At the time of this posting from WatchKnow, this video was a Featured Video on YouTube. The instructor, Sal Khan, continues from Part 1 on multiplying matrices. The student or educator may want to open the video to 'full screen' as the instructor is using a black background and the writing is small. (14:37)
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Solving Limits Algebraically
Explains how to solve limits using the methods of algebra. Also, the presentation notes instances where limits cannot be found algebraically. Animated graphics on white board. The explanation is clear and understandable.Provided by http://www.free-academy.com...
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Calculus General Limit
This video offers a description of the general limit theory in Calculus. Â An explanation on when a limit exists is given. Â Several situations are discussed
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The Giants of Philosophy - Arthur Schopenhauer - 13/18
'Arthur Schopenhauer (22 February 1788 â€“ 21 September 1860) was a German philosopher known for his atheistic pessimism and philosophical clarity' (Arthur Schopenhauer, Wikipedia, 2009). He was influenced by Plato and Kant, and he, in turn, inlfuenced Einstein, Freud, and Jung among others. Suitable for high school students. Video consists of one still image and narration.
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Theories of Democracy
This video is accompanied by text. "In his 1863 Gettysburg Address, Abraham Lincoln defined democracy as "government of the people, by the people, for the people." These words have come to mean different things to different people and have sparked debate over whether the U.S. government really responds to the will of its citizens.
Four theories of democracy have taken shape over time, each addressing the questions of who holds power and influences public policy. The Traditional Theory of D

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Between the Lions: Cliff Hanger and the Yodeling Yellow Yak
Two scientists yearning to find a yodeling yellow yak just might be the key to Cliff Hanger's salvation, in this y-filled installment of Between the Lions' thrilling action-and-phonics serial.Â  In this video, the some of the words are printed out on the screen.Â  Video would be good for early readers.Â
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