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...

Video expands the examples of linearly independent and linearly dependent vectors shown in the previous video to give a formal definition of linearly dependent vectors. Shows a proof of the definition and then gives an example of using...

Video reviews what the null space of a matrix is and how to calculate it, then relates it to linear independence. Shows that if the vectors are linearly independent then the null space is the zero vector. Also shows that if the null...

Defines and gives examples of complementary angles, supplementary angles, and adjacent angles. Practice problems available. [8:31]

Video shows that the transformation matrix of the composition of linear functions is the product of the transformation matrices of each linear transformation in the composition. [16:30]

Video explaining the principle by which plants arrange their flowers in order to maximize the gathering of sunlight, which relates to the Fibonacci series. [6:14]

Video demonstration of reading a stem-and-leaf plot and using it to answer a question. Includes link to practice problems. [5:58]

Explains how to find the perimeter and area of a non-standard, or irregular polygon. [3:03] CCSS.Math.Content.3.MD.C.7.d Recognize area as additive.

This video demonstrates writing shaded areas of a pentagon as a fraction. Practice problems are available. [2:47]

Video lesson deriving the formula for finding the probability of k heads in n flips. Includes the formula for calculating combinations. [11:40]

Identifying parallel and perpendicular lines in a diagram. [3:34]

This video demonstrates how to write a linear equation in slope-intercept form. The example in the video gives the slope and the y-intercept as an ordered pair. The video also explains the slope-intercept formula y=mx + b. Practice...