This video explains how to find the value of a number written in exponential notation. Practice problems are available. [1:15]

This video tutorial demonstrates solutions to problems #51-55 of the California Geometry released state test questions. Problems address proving and using the Pythagorean theorem and compass constructions. [12:35]

Video explaining scientific notation and negative exponents and then writing an example of a very small number in scientific notation. [4:12]

Video first reviews what it means for a function to be invertible. Shows that if a function is invertible then there is a unique solution to f(x) = y. Also shows that if there is a unique solution to the equation f(x) = y for all y then...

Video starts with reviewing matrix notation. Defines multiplying a matrix by a vector and shows examples. Shows how the matrix-vector products can be interpreted as the dot product of column vectors with a matrix or as a weighted linear...

Video demonstrates how to divide a trinomial by a binomial. [3:20]

Explains how to measure an angle in degrees using a protractor. Defines acute, right, and obtuse angles. Practice problems available. [8:22]

This video demonstrates how to solve linear equations in which the variable "x" is in the denominator. There are three different sample problems presented. Practice problems available. [7:39]

Video showing how to graph an exponential function by evaluating the function for chosen values of x and plotting the resulting points. [5:32]

Explains how to use given triangle congruency statements to determine the unknown measures of all angles in a diagram where one large triangle is divided into three congruent triangles. [4:35]

Demonstrates how to add polynomials. Each polynomial is a trinomial. Practice problems available. [2:01]

This video demonstrates how to solve a word problem using an expression and substituting values for a variable. [2:00]

This video covers a short review of addition, followed by basic subtraction concepts. Practice problems are available. [8:32]

Video explains and uses the quotient of powers rule as well as working with algebraic expressions with negative exponents. Video is also included in the Algebra: ck12.org strand. [9:22]

This video shows how to write a decimal in word form, using place value concepts. Practice problems are available. [3:31]

This video introduces basic addition concepts using objects and number lines to represent and add numbers. Practice problems are available. [7:42]

A video that demonstrates how to solve linear equations of the form Ax=B. There are three examples that vary using whole numbers and positive and negative fractions. [7:28]

Video explains how to find special binomial products. Four examples are worked that show how to square a binomial. Three examples are worked that show the product of a sum and a difference (a +b)(a - b). This video also appears in the...

John Green discusses what is arguably the most revolutionary of modern revolutions, the Industrial Revolution. [11:04]

This video describes three factors for the acceleration of change: interconnected world zones, increasing commerce and markets, and new sources of fossil fuel energy. These factors led to the modernization of society in some parts of the...

This video looks at three forces of change that gather momentum and help create the modern world, transforming the biosphere. [11:22]

Historians ask questions about the past to help understand the present and gain insight into the future. Listen to a history professor from the University of Michigan discuss how and why he studies history.

Video tutorial explains the photoelectric effect using wave-particle duality, the work function of a metal, and how to calculate the velocity of a photoelectron. [10:23]

Learn the basics of the deficit, debt and debt ceiling and what happens if the government defaults on its obligations in this Kahn Academy video. [9:57]