Discriminant of Quadratic Equations
This instructor in this video, Sal Khan, discusses the discriminant of quadratic equations. 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.
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Proof of Quadratic Formula
This instructor in this video, Sal Khan, in an understandable manner, discusses how to prove a quadratic formula. 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.
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Using the Quadratic Formula
This instructor in this video, Sal Khan, explains the quadratic formula. 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.
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Identifying Quadratic Models
The insructor uses y=x^2 to give a sense of why the change in the change of y (or the change in the slope) is constant. This instructor in this video, Sal Khan, explains quadratic models. 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.
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Graphs of Quadratic Functions
This instructor in this video, Sal Khan, shows examples of graphing quadratic functions. 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.
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Solving Quadratic Equations by Completing the Square
This instructor in this video, Sal Khan, explains how to solve quadratic equations by completing the square. 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
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Factoring Special Products
This instructor in this video, Sal Khan, discusses how to factor special products.  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 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.
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Sum of Consecutive Odd Integers (How to Solve)
In this video, Sal Khan demonstrates how to solve for x using a single problem.  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.  (04:33) There is a lot of information on the screen--the viewer may want to open the video to 'full screen.' 
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Solving Quadratic Equations by Graphing
The instructor in this video, Sal Khan, uses a graphing calculator to solve quadratic equations. 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.
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Introduction to Function Inverses
Introduction to 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. (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) 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. (06:43)

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Function Inverses Example 2
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)

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Function Inverses, Example 3
Function Inverse Example 3: f(x)= (x - 1) squared -2
This is the last segment of Mr. Khan's short 4-part series on Function Inverses. These installments started with Khan's Introduction to 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 l

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Calculus - Introduction to Limits
In his easy, conversational tone, Mr. Khan offers an introduction to the intuition behind limits. 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. (07:37)
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Limit Examples (Part 1 of 4)
In this nine-minute video, Mr. Khan offers some limit exercises. Mr. Khan uses the Paint Program (with different colors on a black screen) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (07:37)
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Limit Examples (Part 2 of 4)
In this seven-minute video, Mr. Khan offers more limit exercises. Mr. Khan uses the Paint Program (with different colors on a black screen) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (06:57)
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Limit Examples (Part 3 of 4)
In this ten-minute video, Mr. Khan offers even more limit exercises. Mr. Khan uses the Paint Program (with different colors on a black screen) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education.
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Limit Examples, Part 4 (with brain malfunction on first problem)
This video offers 3 interesting limit examples (correct answer for problem 1 is 3/16 (6/(4*8) NOT 6/(4+8)). Mr. Khan uses the Paint Program (with different colors on a black screen) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (15:02) (Brain malfunction--those are the instructor's words, not the uploader to this site.)
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Squeeze Theorem
Mr. Khan offers this video of the intuition (but not a proof) of the Squeeze Theorem. Mr. Khan uses the Paint Program (with different colors on a black screen) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (07:37)
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Algebraic Word Problem
In this video, Sal Khan demonstrates how to solve an algebra word problem.  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.  (08:01) There is a lot of information on the screen--the viewer may want to open the video to 'full screen.' 
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