Conic Sections - Circles - Yay Math
Introduction to circles. Effect of changing parameters in the equation and graphing circles on a co-ordinate plane. Finding radius, center, and points on circumference. White board in a class setting, some interaction, engaging, several examples of increasing complexity. The discussion is clear and understandable.Â
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Complex Numbers - Yay Math
Introduction to complex/imaginary numbers. Defines i and works through several examples with increasing complexity. Using white board in classroom setting. Clear and understandable.Produced by Robert Ahdoot, yaymath.org
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Inverse Functions - Yay Math
Introduction to and working with inverse functions. 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=-1690428245315389775&q=source:012956945238798337823&hl=en Produced by Robert Ahdoot, yaymath.org
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Introduction to Function Inverses
Introduction to Function Inverses. Mr. Khan uses the Paint Program (with different colors)Â to illustrate his points. Sal Khan is the recipient of the 2009Â 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. (09:05)
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Function Inverse Example 1
Function Inverse Example 1: f(x)= -x+4
This is a continuation of Mr. Khan's Introduction to Function Inverses. Mr. Khan uses the Paint Program (with different colors)Â to illustrate his points. Sal Khan is the recipient of the 2009Â 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. (06:43)

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Function Inverses, Example 3
Function Inverse Example 3: f(x)= (xÂ - 1) squared -2
This isÂ the lastÂ segmentÂ of Mr. Khan's short 4-part series on FunctionÂ Inverses.Â TheseÂ installments started with Khan's Introduction to Function Inverses. Mr. Khan uses the Paint Program (with different colors)Â to illustrate his points. Sal Khan is the recipient of the 2009Â 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 l

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Calculus - Introduction to Limits
In his easy, conversational tone, Mr. Khan offers an introduction to the intuition behind limits.Â Mr. Khan uses the Paint Program (with different colors)Â to illustrate his points. Sal Khan is the recipient of the 2009Â Microsoft Tech Award in Education. (07:37)
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i and Imaginary Numbers
Introduction to i. Raising i to arbitrary exponents. Factoring quadratics. This video starts off with a black screen because the narrator uses it as a 'chalkboard'. This video is appropriate for older middle and high school students.
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Complex Numbers in Algebra, (Part 1)
Introduction to complex numbers. Adding, subtracting and multiplying complex numbers. This video starts off with a black screen because the narrator uses it as a 'chalkboard'. This video is appropriate for older middle and high school students.
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The US Constitution: Creating a New Form of Government
A very brief introduction into the Constitution.  A little silly, but it could hold the attention of some students. A lot of words need to be explained and the video clearly needs to be better organized. Best used if previewed and ancillary materials used. The moderators are a distraction.

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Reflexive Pronouns
This video is an introduction to reflexive pronouns.  The lesson presents examples of reflexive pronouns and gives the viewer an opportunity to try and select the correct reflexive pronouns to complete a sentence.

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It's Mine! Possessive Pronouns
This brief video explains possessive pronouns.  It gives examples of possessive pronouns and how to correctly use them.  Even though this video is short, it is a good review or introduction to possessive pronouns.

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This video explains what heteronyms are, these are words that are spelled the same, but pronounced differently. Â For examples, as a noun, dove is a type of bird. Â As a verb, dove is the past tense of dive. The difference usually comes because it is a different part of speech and the emphasis is on a different syllable. Â  Video is a great introduction or review of heteronyms.Â
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Waterproof Gecko is Unsinkable and Can Walk on Water
Two minute video shows geckos in/on the water. Excellent footage. Great for introduction into anmial unit. Perhaps a compare and contast with a lizard. Run time 02:28.
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Re- and Pre- Spelling Patterns
Introduction is almost 2 minutes long. Â A spelling list of Â pre- and re- prefix word practice. Â Narrators reads the entire list and the challenge words. Â Each word is spelled orally and individual letters appear on the screen. Â Narrator defines the word. Â Students are asked to trace and say the word. (18:
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In, On, Under, Over, In Front, Behind!
This short video from http://EnglishSongsDVD.com is a quick basic introduction to some prepositions.Â  It would be a good starting point for discussing prepositions, but the audio is very fast and it can be difficult to understand the singer's words.Â
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Prepositions of Direction, Part 3 of
This is part 3 of a lesson on prepositions of location and direction. The list of prepositions is long, so this is meant to be a review and not an introduction. Level: high beginner - intermediate. (8:26)
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Introduction to Word Problem Terms
This is an introduction to basic word problem terms.  Larry discusses key words that are usually associated with a particular mathamatical operation. Terms are shown for addition, subtraction, multiplication, and division.

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Snippet from money video. Â Children learn why it is important to learn how to count money.Â  Children learn the names and value of pennies and nickels. Â Children are told coins are round and then shown a coin and told how much it is worth. Â  Â Introduction is 1 min. long. (3:36)

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Amusing introduction to hydrogen
An amusing introduction to the properties of hydrogen.Â Â Illustrates that hydrogen is lighter than air, with a balloon.Â  A wild-haired professor discusses the element, that it's part of water, and introduces the notion ofÂ deuterium.Â  Finally, the hydogen balloon isÂ exploded with some fire.Â  Part of the Periodic Table of Videos series; periodicvideos.com.
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