Texas Instruments
Texas Instruments: Estimating Square Roots
By estimating the value of a square root students will get practice in identifying perfect squares, in checking for reasonableness of an answer, and in mental math.
Illustrative Mathematics
Illustrative Mathematics: 8.ns Estimating Square Roots
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.
Khan Academy
Khan Academy: Approximating Square Roots
Practice finding the approximate value of square roots by thinking about perfect squares.
Khan Academy
Khan Academy: Simplify Square Roots (Variables)
Simplify square roots that contain variables in them.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Solving Quadratic Equations by Finding Square Roots
Thirteen problems present a variety of practice solving quadratic equations by finding square roots. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the...
CK-12 Foundation
Ck 12: Algebra: Use Square Roots to Solve Quadratic Equations
[Free Registration/Login may be required to access all resource tools.] This lesson covers solving quadratic equations using square roots.
Illustrative Mathematics
Illustrative Mathematics: N Cn, a Rei Complex Square Roots
Working with complex numbers allows us to solve equations that cannot be solved with real numbers. Here we will investigate complex numbers which arise as square roots of certain complex numbers. Aligns with N-CN.A.2 and A-REI.A.1.
Khan Academy
Khan Academy: Quadratics by Taking Square Roots
Solve quadratic equations of the form (x+a)^2-b=0. These can be solved using square roots. For example, solve (x-5)$2-4=0.
Khan Academy
Khan Academy: Quadratics by Taking Square Roots: Strategy
Analyze the process of solving a quadratic equation by taking the square root.
Khan Academy
Khan Academy: Quadratics by Taking Square Roots
Solve quadratic equations of the form (x+a)squared-b=0. These can be solved using square roots. For example, solve (x-5)squared-4=0. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
Integrated Publishing
Integrated Publishing: Trinomial Squares
Discussion on trinomial squares. Includes examples as well as practice problems.
Texas Instruments
Texas Instruments: Study Cards
Students use the StudyCard stack to review their understanding of squares and square roots.
Fun Brain
Fun Brain: Tic Tac Toe Squares (Math Facts Games)
Players practice adding, subtracting, multiplying, and dividing skills while playing virtual Tic Tac Toe. They can also try their hand at squares, cubes, and square roots.
Cuemath
Cuemath: Square Root
Explore the world of square roots in this mini-lesson. Provides a definition and different methods for finding the square root of a number. Includes solved examples and practice questions with answers.
Other
Math Pages: Ancient Square Roots
This site from Math Pages proivdes information and gives the Babylonian method for solving square root equations. The site is very intense and in-depth with good information. The material is pretty intense, however, and a background...
Quia
Quia: Square Roots (Concentration Game)
This concentration game explores square roots. There is a link to a list of the numbers being used so students can check their answers.
Illustrative Mathematics
Illustrative Mathematics: 8.ns Placing a Square Root on the Number Line
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...
Other
Square Root on Your Computer's Calculator
Site provides a tutorial on using a calculator to evaluate square roots.
CK-12 Foundation
Ck 12: Algebra: Square Root Applications
[Free Registration/Login may be required to access all resource tools.] Solve applications using square roots.
Integrated Publishing
Integrated Publishing: Roots, Exponents, and Radicals
Information on powers, roots, exponents, and radicals.
Texas Instruments
Texas Instruments: Roots
Concepts and skills covered in this activity include roots, powers of 10, and problem solving. Roots is taken from "Investigating Mathematics with Calculators in the Middle Grades".
Khan Academy
Khan Academy: Quadratics by Taking Square Roots
Analyze the process of solving a quadratic equation by taking the square root. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.