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Lesson Plan
Curated OER

Cardinal Directions

For Teachers 2nd - 3rd
Students draw items on a map in specific places to show their knowledge of cardinal directions. In this simple map skills lesson plan, students draw a cloud, a tree, a house, and a lake to show North, South, East, and West.
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Unit Plan
Wyzant

Wyzant: Factoring a Difference Between Two Squares Lessons

For Students 9th - 10th
Several examples are presented to demonstrate how to factor a polynomial that is a difference of two squares. The online worksheet helps for extra practice.
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Unit Plan
Lawrence Hall of Science

The Math Page: Skill in Algebra: The Difference of Two Squares

For Students 9th - 10th
Here is a site that clearly and thoroughly explains factoring and multiplying a difference of two squares. There are example problems solved, problems for the student to attempt, and answers to the student problems. A set of cumulative...
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Activity
Cool Math

Coolmath: Difference of Two Squares, Sum and Difference of Two Cubes

For Students 6th - 9th
This algebra lesson explains how to factor the difference of two squares and the sum and difference of two cubes.
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Unit Plan
Mangahigh

Mangahigh: Algebra: Factor Using the Difference of Two Squares

For Students 9th - 10th
Students watch an online tutorial on the concept of factoring using the difference of two squares . After watching, students test their knowledge by attempting ten practice problems that increase or decrease in difficulty based on their...
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Unit Plan
Mangahigh

Mangahigh: Algebra: Factor Using the Difference of Two Squares

For Students 9th - 10th
Students watch an online tutorial on the concept of factoring trinomials using the difference of two squares. After watching, students test their knowledge by attempting ten practice problems that increase or decrease in difficulty based...
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Activity
Discovery Education

Discovery Education: Web Math: Factor Polynomial by Rewriting It as the Difference Between Two Squares

For Students 9th - 10th
This WebMath site includes an interactive problem solver. Use it to factor a polynomial that is the difference between two perfect squares. The website will bring back a full explanation behind the answer.
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PPT
Sophia Learning

Sophia: Using the Difference of Two Squares to Solve Equations: Lesson 2

For Students 9th - 10th
This lesson demonstrates how to use the difference of two squares and the zero product property to solve for binomial equations. It is 2 of 4 in the series titled "Using the Difference of Two Squares to Solve Equations."
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PPT
Sophia Learning

Sophia: Using the Difference of Two Squares to Solve Equations: Lesson 4

For Students 9th - 10th
This lesson demonstrates how to use the difference of two squares and the zero product property to solve for binomial equations. It is 4 of 4 in the series titled "Using the Difference of Two Squares to Solve Equations."
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Activity
Wyzant

Wyzant: Factoring a Difference Between Two Squares Worksheet

For Students 9th - 10th
The resource consists of a worksheet, answer sheet, and example problem on factoring expressions as a difference between two squares.
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Handout
Oswego City School District

Regents Exam Prep Center: Factoring the Difference of Two Perfect Squares

For Students 9th - 10th
Use this site to learn the trick to factoring when the polynomial is a difference of two perfect squares. The site contains examples that are easy to follow.
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Unit Plan
CK-12 Foundation

Ck 12: Algebra: Factorization Using Difference of Squares

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Factor the difference of two squares and perfect square trinomials and solve quadratic polynomial equations by factoring.
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Unit Plan
CK-12 Foundation

Ck 12: Algebra: Factorization Using Difference of Squares

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Factor the difference of two squares and perfect square trinomials and solve quadratic polynomial equations by factoring.
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Unit Plan
CK-12 Foundation

Ck 12: Algebra: Factorization Using Perfect Square Trinomials

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] Factor perfect square trinomials and the difference of two squares and solve quadratic equations by factoring.
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Unit Plan
Texas A&M University

Wtamu Virtual Math Lab: College Algebra: Factoring Polynomials

For Students 9th - 10th
This page includes a tutorial which teaches you how to find the Greatest Common Factor (GCF) of a polynomial, factor out the GCF of a polynomial, factor a polynomial with four terms by grouping, factor trinomials, and factor a difference...
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Unit Plan
Khan Academy

Khan Academy: Difference of Squares

For Students 9th - 10th Standards
Factor quadratic expressions of the general difference of squares form. The factored expressions have the general form (ax+b)(ax-b). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
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Handout
Math2

Math2.org: Polynomial Identities

For Students 9th - 10th
This resource provides a list of polynomial identities, including formulas for squaring a binomial, FOILing a trinomial, factoring a difference of two squares, factoring a sum or difference of two cubes, and the Quadratic Formula.
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Unit Plan
Khan Academy

Khan Academy: Difference of Squares Intro

For Students 9th - 10th
Factor quadratic expressions into the special products of the general form (x+a)(x-a). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Activity
Interactive Mathematics

Interactive Mathematics: Common Factor & Difference of Squares

For Students 9th - 10th
These easy to follow examples demonstrate how to factor algebraic expression using GCF and difference of squares.
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Activity
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Difference of Squares

For Students 9th - 10th
Find a quick, concise explanation of how to find the difference of squares. An example is given and clearly explained.
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Handout
Purple Math

Purplemath: Special Factoring: Differences of Squares

For Students 9th - 10th Standards
Demonstrates how to use the formula for finding the differences of squares, and warns against trying to factor a sum of squares.
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Activity
University of Saskatchewan (Canada)

University of Saskatchewan: Factoring Polynomials

For Students 9th - 10th
This site from the University of Saskatchewan provides an explanation of factoring by grouping, greatest common factor, perfect squares, and difference of squares. Higher degree polynomials factored as well. Some examples provided along...
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Unit Plan
Wyzant

Wyzant: Factoring Completely

For Students 9th - 10th
The resource examines the algebra topic of solving equations. Students view the tutorial to review how to solve by factoring. The lesson consists of the greatest common factor, difference between two squares, and trinomial techniques. An...
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Activity
Harvey Mudd College

Mudd Math Fun Facts: Difference of Squares

For Students 9th - 10th Standards
Using algebra, learn how to do fast math in your head!