Zero and Friends - Zero Singing the Blues
Zero contemplates whether or not he really is a number in this blues duet with his number friend, One. Beautiful pen and ink drawing back ground with animated zero and one cartoon character.  (1:21)
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Finding the Mean
This PowerPoint video demonstrates how to find the mean for a set of data.  One example is modeled with a step by step approach.
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Find Missing Term in a Proportion
This is a  video presentation in direct proportion.  The objective of the video is to find the missing term expressed as x in a proportion.  An example is used with the number of dogs.

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Median of a Trapezoid
In this video students learn the definitions of a trapezoid, an isosceles trapezoid, and the median of a trapezoid. Students also learn the following theorems related to trapezoids. The base angles of an isosceles trapezoid are congruent. The median of a trapezoid is (a) parallel to the bases and (b) has a length equal to the average of the lengths of the bases.

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Intro to Range, Median, and Mode
This video provides and introduction to range, median and mode. Examples of range, median, and mode are shown in the video.

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Video on Subtracting Decimals - Math Help
Students learn to subtract decimals by first lining up the decimal points, then subtracting the numbers by column. They also learn to add zeros if the numbers don't line up evenly. Instructor uses a white board. Suitable for older elementary students.
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Subtracting Decimals - Math Help
Students learn to subtract decimals by first lining up the decimal points of each number. For fourth-graders and older students.
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5th Grade: Dividing With Fractions and Whole Numbers
This is a lesson on dividing fractions with whole numbers.  It is geared towards fifth-grade students.

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Basic Math: Lesson 6 - Video Clip #9 - Arithmetic of Fractions: Addition
Concepts covered: Addition of Improper and Proper Fractions and also Mixed Numbers.
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Multiplication 4: 2-digit times 1-digit number
In this video, the instructor shows how to multiply a two-digit number by a one-digit number. Instructor uses the Paint Program to demonstrate the points of his discussion. For third grades through sixth. (At one point instructor makes an error...he says that "anything x 1=9". However, minus that one error, the rest of the video is very good.)
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Rays
Students learn the definitions of a segment, a ray, and length, as well as the symbols that are used in Geometry to represent each figure. Students also learn the definitions of an endpoint, opposite rays, a coordinate, and a number line. Students are then given geometric figures that are composed of segments and rays, and are asked true/ false questions about the given figures. Students are also given number lines, and are asked short answer questions about the given number lines. Students are
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SEGMENTS AND RAYS
This short powerpoint presentation is designed to help the high school students really appreciate the beauty of mathematics and its real life application.
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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.  Singer chants the equations.   Repeats facts several times.  (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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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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