Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Greatest Common Factor 2

For Students 9th - 10th Standards
Twenty-four problems present a variety of problems working with finding the greatest common factor and finding prime factorizations. They are given with each step to the solution cleverly revealed one at a time. You can work each step of...
Activity
Other

Help With Fractions: The Greatest Common Factor

For Students 3rd - 8th Standards
Two different methods of finding the greatest common factor are explained at this one page website. It is very easy to follow the step by step directions.
Interactive
Other

Greatest Common Factor Calculator

For Students 9th - 10th Standards
Free online calculator provides help with finding the greatest common factor.
Interactive
Calculator Soup

Calculator Soup: Greatest Common Factor Gcf Calculator

For Students 6th - 8th Standards
Calculate GCF, GCD, and HCF of a set of two or more numbers and see the work using factorization. An interactive calculator, explanations, and examples are included.
Activity
Purple Math

Purplemath: Lcm & Gcf

For Students 9th - 10th Standards
Purplemath shows an easy and orderly way to determine the GCF and LCM of any two numbers. Even large numbers won't be a challenge with this method.
Handout
Cuemath

Cuemath: Highest Common Factor

For Students 9th - 10th Standards
Explore the world of Highest Common Factor or Greatest Common Factor (GCF) by going through its various aspects and properties. Find answers to questions like what is the highest common factor for a group of numbers, easy ways to...
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Graphing Calculator Practice Problems Number Theory

For Students 9th - 10th Standards
Practice using your graphing calculator for number theory problems, including prime factorization, greatest common factor, least common multiple, and scientific notation. If you get stumped or if you would like to check your work, then...
Handout
Paul Dawkins

Paul's Online Notes: Algebra: Preliminaries: Factoring Polynomials

For Students 9th - 10th
Detailed math tutorial features notes and examples that illustrate how to factor polynomials. It discusses factoring out the greatest common factor, factoring by grouping, factoring quadratics, and factoring polynomials with degree...
Whiteboard
SMART Technologies

Smart: Factors and Multiples

For Teachers 3rd - 6th Standards
Students are introduced to prime numbers, composite numbers, prime factorization, greatest common factor, and least common multiple in this SMART whiteboard activity.
Unknown Type
University of Vienna (Austria)

University of Vienna: Elementary Properties of Numbers

For Students 9th - 10th Standards
Quick interactive assessment which determines skill level on fraction equivalence, prime factorization, and common divisors/multiples.
Whiteboard
ClassFlow

Class Flow: Greatest Common Factor

For Teachers 6th - 8th Standards
[Free Registration/Login Required] This flipchart assists in the instruction of finding the Greatest Common Factor. Two methods for identifying GCF are used.
Activity
Texas Instruments

Texas Instruments: It's Greek to Me

For Teachers 6th - 8th
Students learn Euclid's Method of finding the Greatest Common Factor of large numbers. They also review finding GCF using prime factorization and listing.
Unknown Type
Math Aids

Math Aids: Factors Worksheets

For Students K - 1st
Great resource for learning and practicing fractions and their different operations. Math worksheets are printable, may be customized, and include answer keys.
Unknown Type
Math Aids

Math Aids: Fractions Worksheets

For Teachers K - 1st Standards
Great resource for learning and practicing fractions and their different operations. Math worksheets are printable, may be customized, and include answer keys.