Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Ordering Numeric Expressions
This video shows how to order fractions, decimals, and percents. Practice problems are available. [9:22]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Decimals on a Number Line
This video shows how to locate and plot a decimal number on a number line. Practice problems are available. [1:39]
Khan Academy
Khan Academy: Pythagorean Theorem Proof Using Similarity
This video tutorial lesson [9:52] provides a proof for the Pythagorean Theorem by breaking a right triangle into two similar triangles and setting up ratios of corresponding sides.
Khan Academy
Khan Academy: Algebra: Sum of Functions
Video finding the sum of two quadratic functions. [2:33]
Khan Academy
Khan Academy: Statistics: Sampling Distribution of the Sample Mean 2
Video discusses the effect of sample size on the sampling distribution. Shows using a simulation how as sample size increases the sampling distribution becomes more normal and the standard deviation decreases. Also discusses the effect...
Khan Academy
Khan Academy: Algebra: Distance Formula
This video demonstrates how to find the distance between any two points on a the coordinate plane. It shows how the distance formula was derived using the Pythagorean theorem. Practice problems avaialble. This video is also found in the...
Khan Academy
Khan Academy: Algebra: Factoring Special Products 2
Video demonstrates how to recognize and factor perfect square trinomials. The example problem is in the form ax^4 - bx^2 + c. [2:25]
Khan Academy
Khan Academy: Algebra: Application Problem With Quadratic Formula
Explains how to solve a word problem regarding the amount of time it takes for a ball to hit the ground after being shot off a building by using the quadratic formula to find solutions to the given equation. [5:53]
Khan Academy
Khan Academy: Algebra: Solving Equations 1
This video demonstrates how to solve the equation -16= x/4 + 2. It also demonstrates how to check your answer by substituting back into the original equation. [3:04]
Khan Academy
Khan Academy: Algebra: Multiplying Monomials by Polynomials
Video demonstrates how to use the distributive property to multiply a monomial with a polynomial. [2:43]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: More Complicated Order of Operations
This video explores more advanced order of operations problems in numerical expressions. Practice problems are available. [9:40]
Khan Academy
Khan Academy: Algebra: Solving Equations With the Distributive Property 2
This video demonstrates how to solve a multi-step equation using the distributive property. There is one example that includes integers and fractions. [4:50]
Khan Academy
Khan Academy: Algebra: Introduction to Logarithm Properties
Identifies the properties for adding and subtracting logarithms with the same base. Practice problems available. [9:15]
Khan Academy
Khan Academy: Algebra: Perimeter and Unit Conversion
A step-by-step breakdown on how to approach and solve a problem involving perimeter of a space and converting between units to calculate the dimension of the space. [6:12]
Khan Academy
Khan Academy: Pre Calculus: Introduction to Compound Interest and E
A video exploring the concept of compound interest by introducing the idea that interest can be compounded at different intervals, i.e. annually, monthly, daily, continuously, etc. The instructor uses a concrete example to show what...
Khan Academy
Khan Academy: Algebra: Complex Numbers: Number Sets 2
Video explains in which number sets in the real number system that a specific repeating decimal belongs. Shows method for rewriting the repeating decimal as a fraction. [6:52]
Khan Academy
Khan Academy: Geometry: Sum of Interior Angles of a Polygon
Demonstrates how to generalize the formula for finding the interior angle sum of a polygon by noticing how many non-overlapping triangles a polygon can be broken into. Practice problems available. [9:10]
Khan Academy
Khan Academy: Linear Algebra: Linear Transformations: Scaling and Reflections
Video first reviews how to find the transformation matrix using the identity matrix. Shows how to write a transformation matrix that reflects over the y-axis and scales the y-coordinates by a factor of 2. [15:13]
Khan Academy
Khan Academy: Algebra: Conic Sections: Foci of an Ellipse
A video lesson exploring the foci of an ellipse. The formula for finding the foci is derived algebraically and then applied to a specific ellipse equation. [13:49]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Partial Quotient Division
This video shows partial quotient method for dividing numbers. Practice problems are available. [8:27]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Exponent Rules Part 2
This video demonstrates to the student more of the laws of exponents. Practice problems are available. [7:44]
Khan Academy
Khan Academy: Geometry: Congruent Triangle Proof Example
Demonstrates how to use triangle congruency to prove that a given point is the midpoint of a given line segment. The proof is written in the form of a two-column proof. Practice problems available. [5:46]
Khan Academy
Khan Academy: Algebra: Richter Scale
Discusses the Richter scale as a logarithmic scale and explains how to interpret the magnitudes of four different earthquakes. [11:19]
Khan Academy
Khan Academy: Algebra: Graphs of Linear Equations
This video demonstrates how to graph a linear equation by creating a table of x, y values to use as coordinates for the graph of the line. The second example demonstrates how to take a word problem and create a table of values to graph...