Khan Academy
Khan Academy: Algebra: Order of Operations Example
A video that demonstrates how to use order of operations to evaluate expressions with and without variables. Some expressions contain up to two variables. [14:23]
Khan Academy
Khan Academy: Brain Teasers: Path Counting Brain Teaser
Video explains how to solve the following brain teaser: Starting in the upper left hand corner of a 6x6 grid, how many different ways are there to get to the bottom right corner of the grid, with movement restricted to moving to the...
Khan Academy
Khan Academy: Calculus: Calculus: Derivatives 1 (New Hd Version)
Video introducing a derivative as the slope of a tangent line by reviewing the concept of the slope of a line. Includes link to additional practice problems. [15:43]
Khan Academy
Khan Academy: Calculus: Calculus: Derivatives 2 (New Hd Version)
Video lesson finding the slope of a tangent line of a function at a point by finding the limit of the slope of the secant line. Includes link to additional practice problems. [8:28]
Khan Academy
Khan Academy: Calculus: Integrals: Trig Substitution 1
Video lesson solving for an indefinite integral by substituting a trigonometric identity. [7:38]
Khan Academy
Khan Academy: Geometry: Language and Notation of the Circle
Formally defines a circle and different parts of a circle. Identifies the proper notation for naming different parts of a circle. [11:12]
Khan Academy
Khan Academy: Algebra: Absolute Value Equations Example 1
This video demonstrates how to solve an equation that contains absolute values. It also shows how to check your answer. This video also appears in the strand Algebra: Absolute Value. [3:26]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Addition 4
This video shows addition of numbers to millions, demonstrating regrouping of numbers and place value. Practice problems are available. [8:49]
Khan Academy
Khan Academy: Algebra: Ratios as Fractions in Simplest Form
Short video demonstrating how to write a ratio as a fraction in the simplest form by finding the greatest common factor. This video also appears in the strand Arithmetic and Pre-Algebra: Ratios and Proportions. [1:19]
Khan Academy
Khan Academy: Geometry: Ca Geometry: Area, Circumference, Volume
Demonstrates solutions to problems #31-35 of California Geometry released state test questions. Problems address understanding of perimeter, volume, surface area, area, and Pythagorean theorem. [10:53]
Khan Academy
Khan Academy: Algebra: Applying the Quadratic Formula
Demonstrates how to find the solutions of a given quadratic equation with a negative leading coefficient using the quadratic formula. [4:51]
Khan Academy
Khan Academy: Algebra: Evaluating Exponential Expressions
Video evaluating an exponential expression using the order of operations. [2:41]
Khan Academy
Khan Academy: Algebra: Quadrants of Coordinate Plane
This video identifies the four quadrants of the coordinate plane and explains how to identify what quadrant an ordered pair would be located in. Practice problems available. [2:24]
Khan Academy
Khan Academy: Statistics: Normal Distribution: Standard Normal & Empirical
Video example of giving the mean and standard deviation of the standard normal distribution and finding probabilities using the empirical rule. [8:16]
Khan Academy
Khan Academy: Algebra: Graphical Systems Application Problem
This video demonstrates how to solve a word problem that requires setting up and solving a system of equations. The problem requires that the system of equations be solved graphically. [5:19]
Khan Academy
Khan Academy: Algebra: Solving Quadratic Equations by Square Roots
Video shows how to solve a quadratics in a certain form by isolating the squared term and taking the square root of both sides. Examples help lead into solving quadratics by completing the square. [11:03]
Khan Academy
Khan Academy: Algebra: Solving Linear Equations by Graphing
This video demonstrates how to solve systems of two equations by graphing each line and finding the point of intersection. [8:30]
Khan Academy
Khan Academy: Algebra: Linear Equations in Slope Intercept Form
This video includes several sample problems that involve finding the equation of a line in slope-intercept form. This video is also found in the strand Algebra: ck12.org. [14:58]
Khan Academy
Khan Academy: Geometry: Similarity Postulates
Explains the minimum amount of information needed to determine if two triangles are similar. Names and illustrates the similarity postulates: AA, SSS, and SAS. [12:14]
Khan Academy
Khan Academy: Geometry: Equilateral and Isosceles Example Problems
Demonstrates how to use the triangle sum theorem, properties of equilateral and isosceles triangles, and special angle pairs to determine the unknown measures of angles in three different diagrams. [6:27]
Khan Academy
Khan Academy: Algebra: Graphical Slope of a Line
This video demonstrates how to find the slope of a line given the graph of the line. The video uses a formula and demonstrates how to find the slope with several sets of points on the line. It shows that the slope is the same no matter...
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Division 2
This video starts with a review of multiplication facts, then shows division examples with remainders. Practice problems are available. [17:02]
Khan Academy
Khan Academy: Geometry: Ca Geometry: More Trig
The video tutorial [12:21] demonstrates solutions to problems #66-70 of California Geometry released state test questions. Problems address basic trigonometry ratios, 30-60-90 triangles.
Khan Academy
Khan Academy: Algebra: One Step Equations
This video demonstrates on how to solve a one step equation involving addition, subtraction, multiplication, and division. There are six sample problems that include positive and negative integers, fractions, and decimals. Practice...