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Interactive
Lawrence Hall of Science

The Math Page: Topics in Pre Calculus: Completing the Square

For Students 9th - 10th Standards
Here is a site that clearly and thoroughly explains how to solve quadratic equations by completing the square. The quadratic formula is derived using this method on this page. Point this site out to students who have been absent or who...
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 8.ns Placing a Square Root on the Number Line

For Teachers 8th Standards
This task develops students' number sense of squares and square roots. They are to find an approximation of a less obvious square root of a number to see where it would fall on a number line. To do this, they must examine perfect squares...
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Unit Plan
Khan Academy

Khan Academy: Simplify Square Roots

For Students 9th - 10th
Students solve simple square roots and receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Activity
Math Is Fun

Math Is Fun: Squares and Square Roots

For Students 9th - 10th Standards
The learning activity examines squares and square roots. Topics include perfect squares, how to square a number, and the square root symbol. The resource consists of explanations and examples.
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Article
Mocomi & Anibrain Digital Technologies

Mocomi: What Is Square Root?

For Students 2nd - 8th
Briefly covers the topics of square roots, decimal numbers, and perfect squares.
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Unit Plan
Math.com

Math.com: Numbers: Square Roots

For Students 6th - 8th Standards
The pre-algebra resource investigates square roots. Definitions, detailed examples, and practice problems are included.
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Activity
Other

Mathsteacher: Squares

For Students 9th - 10th Standards
The lesson examines squares through definitions and examples. Properties of squares are also explored.
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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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Lesson Plan
Other

Nearpod: Quadratic Equations: Completing the Square

For Teachers 9th - 10th Standards
In this lesson on completing the square, students explore the connection between area models and perfect square trinomials. They also learn how to complete the square to transform a quadratic equation into vertex form.
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Unit Plan
Khan Academy

Khan Academy: Approximating Square Roots

For Students 7th - 8th Standards
Practice finding the approximate value of square roots by thinking about perfect squares. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Interactive
Quia

Quia: Square Roots (Concentration Game)

For Students 6th - 8th Standards
This concentration game explores square roots. There is a link to a list of the numbers being used so students can check their answers.
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Unit Plan
CK-12 Foundation

Ck 12: Algebra: Estimation of Square Roots

For Students 7th
[Free Registration/Login may be required to access all resource tools.] Approximate square roots to the nearest given decimal place
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Handout
Quia

Ixl Learning: Square Roots

For Students 7th - 9th Standards
Brush up on your math skills relating to square roots then try some practice problems to test your understanding.
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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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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 8.ns Estimating Square Roots

For Teachers 8th Standards
This task asks students to estimate the square root of 800 without using a calculator. To do it, they must examine perfect squares that are higher and lower than 800. Aligns with 8.NS.A.
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Unknown Type
Khan Academy

Khan Academy: Approximating Square Roots

For Students 8th
Practice finding the approximate value of square roots by thinking about perfect squares.
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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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Handout
Quia

Ixl Learning: Square Numbers

For Students 3rd - 5th Standards
Brush up on your math skills relating to square numbers then try some practice problems to test your understanding.
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Interactive
Fun Brain

Fun Brain: Tic Tac Toe Squares

For Students 6th - 8th Standards
Players simplify square roots to win the tic tac toe learning game.
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Activity
Other

Mathebook.net: Middle: Square Root

For Students 6th - 8th Standards
The online virtual self-checking resource has students practice calculating the square root of a number.
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Activity
Oswego City School District

Regents Exam Prep Center: Simplifying Radicals

For Students 9th - 10th
Use this site to learn how to simplify radicals, even when the radical is not a perfect square. These examples will be a guide to you in simplifying all kinds of radicals.
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Activity
Texas Instruments

Texas Instruments: Knowing About Numbers

For Teachers 9th - 10th
Students experience square roots, perfect squares, and absolute value to enhance their knowledge of numbers. Taking this awareness, students apply it to operations with integers.
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Unit Plan
CK-12 Foundation

Ck 12: Algebra: Factor Polynomials Using Special Products

For Students 10th - 12th
[Free Registration/Login may be required to access all resource tools.] This lesson covers factoring perfect square trinomials and the difference of squares.

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