How to Read a Protractor
The instructor uses a protractor, pen, and paper to demonstrate how to use a protractor to measure angles.
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.
Solving Systems of Linear Equations by Graphing
Instructor uses a white board to demonstrate graphing systems of linear equations. Â Examples include being given two linear equations, finding the slope and y-intercept, and then graphing to determine the point of intersection. (4:49)
Systems Of Equations With Fractions - Using Substitution
In this video lesson, students learn to solve systems of linear equations that involve fractions. Students also learn to solve linear systems of equations by the method of their choice using the following rules: if one of the variables cancels out when the equations are added together, then use addition, and if a variable is already isolated in one of the equations, then use substitution.
 (3:23)
Simplifying Rational Expressions
This video walk the learner through the steps to simplify rational expressions. Â Specific circumstances are discussed and several problems are modeled. Â
Adding and Subtracting Rational Expressions
In this video, the instructor talks about adding and subtracting rational expressions. He first defines what rational expressions are and how they are different from equations. In general, the instructor states that the idea is to make the expression into a single fraction if possible. The instructor walks the viewer step by step through three different examples of adding and subtracting rational expressions.
Basic Algebra : How to Write an Algebraic Expression
Writing an algebraic expression in mathematics involves any combination of variables or letters and numbers. Understand the concept of algebra and its flexible expressions with insight from a math teacher in this video on mathematics.
Expert: Jimmy Chang
Bio: Jimmy Chang has been a math teacher at St. Pete College for nearly a decade. He has a master's degree in math, and his specialties include calculus, algebra, liberal arts, math and trigonometry.
Filmmaker: Christop
Simplifying Rational Expressions
In this teacher created video, the teacher defines a rational expression. Then the teacher models the steps of simplifying the rational expression on a white board. ( 1:26)
Exponential and Logarithmic Equations - Yay Math
Solving exponential equations by using a common base. Introduction to logarithmic notation. 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=-7783301627139702841&q=source:012956945238798337823&hl=en
Produced by Robert Ahdoot, yaymath.org
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)Â to illustrate his points. Sal Khan is the recipient of the 2009Â Microsoft Tech Award in Education. (07:37)
Calculus Limits: A Numerical Approach
In Calculus, the term limit is used to describe the value that a function approaches as the input of that function approaches a certain value. This video explains the two ways to demonstrate Calculus limits: a numerical approach or a graphical approach. In the numerical approach, we determine the point where the function is undefined and create a table of values to determine the value of the variable as it approaches that point. (1:45)
One-Sided Limits
This video explains one-sided limits. A limit is the value that a function approaches as the input of that function approaches a certain value. In Calculus, sometimes functions behave differently depending on what side of the function that they are on. By definition, a one-sided limit is the behavior on only one side of the value where the function is undefined. (3:02)
Calculus Limits: A Graphical Approach
This video explains the graphical approach to determine a limit. There are two ways to determine a limit: a numerical approach or a graphical approach. In the graphical approach, we analyze the graph of the function to determine the points that each of the one-sided limits approach. (3:02)
Infinite Limits: Vertical Asymptotes
This video explains when a limit decreases or increases without bound near certain values for the independent variables, they are called infinite limits. In general, a fractional function will have an infinite limit if the limit of the denominator is zero and the limit of the numerator is not zero. The infinite limit can be either positive or negative and is determined by the sign of the quotient of the numerator and the denominator. (3:23)
Continuity of a Function
This video explains the three conditions that must be met in order for a function to be continuous at a certain point. The continuity of a function only exists if these three conditions are met. (0:55)
Continuous Functions
If functions are continuous at every point in their domain, they are called continuous functions. This video provides examples of continuous functions including power functions, exponential functions, and logarithmic functions. (2:58)
How to Measure Volume
A video showing the steps in measuring volume. Â Slides show each step. Â No narration. Â (:47)
Ku Klux Klan- A Secret History [9/9]
(Caution: Scenes of violence and insensitive racial language)THE 20TH CENTURY(TM) ventures back to the days of the Reconstruction South and through the landmarks in Klan history to tell the complete story of the most famous hate group in America. Discover how the six original Klansmen came together and chose their name. See how the release of America's first blockbuster movie spurred a resurgence in the KKK and how they expanded their target to include Jews, Catholics and immigrants as well as b
Averages (in Algebra)
Introduction to averages and algebra problems involving averages. This video starts off with a black screen because the narrator uses it as a 'chalkboard'. This video is appropriate for older mddle and high school students.
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.
