Lesson Plan
Better Lesson

Better Lesson: Gcf and Lcm Quiz

For Teachers 6th Standards
Sixth graders show what they know about greatest common factor and east common multiple.
Lesson Plan
Better Lesson

Better Lesson: Gcf and Lcm Word Problems

For Teachers 6th Standards
Sixth graders differentiate between greatest common factor and least common multiple word problems.
Lesson Plan
Better Lesson

Better Lesson: Gcf and Lcm Project Gallery Walk

For Teachers 6th Standards
Sixth graders further their understanding of finding the greatest common factor and least common multiples.
Lesson Plan
Better Lesson

Better Lesson: Gcf and Lcm Project, Day 1

For Teachers 6th Standards
Sixth graders collaborate on a greatest common factor and least common multiple project.
Activity
Cool Math

Coolmath: Gcf's and Lcm's Greatest Common Factor

For Students 4th - 7th Standards
Understand how to find the greatest common factor.
Interactive
Other

Greatest Common Factor Calculator

For Students 9th - 10th Standards
Free online calculator provides help with finding the greatest common factor.
eBook
Math Planet

Math Planet: Pre Algebra: Finding the Greatest Common Factor

For Students 6th - 8th Standards
Gain an understanding of how to find the greatest common factor by viewing examples and a video lesson. [1:47]
Activity
Texas A&M University

Wtamu Virtual Math Lab: Intermediate Algebra: Gcf and Factoring by Grouping

For Students 9th - 10th
Excellent tutorial on GCF of polynomials, including examples and step-by-step instruction on factoring.
Unit Plan
Math.com

Math.com: Greatest Common Factor/practice Calculator

For Students 9th - 10th
A page which generates number pairs and allows the user to find and enter the GCF. Keeps a running tally of correct/incorrect answers and has links to in depth review, if needed.
Unknown Type
Soft Schools

Soft Schools: Greatest Common Factor Worksheet

For Students 9th - 10th Standards
Find the greatest common factor between two numbers. You may set the total number of problems per page, the minimum and maximum numbers, and an answer key is optional.
Lesson Plan
George Mason University

Margo Mankus: Investigating Lcm and Gcf Using Rods

For Teachers 9th - 10th Standards
This lesson plan is for an activity using rods (Cuisenaire Bars) to help students understand the concept of factors, in particular the LCM and GCF of two numbers.
Activity
Discovery Education

Discovery Education: Web Math: Greatest Common Factor

For Students 9th - 10th
This WebMath site contains a tool for locating the greatest common factor. Simply plug in the numbers and you are on your way! Use it to check your answers.
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.
Activity
Texas Instruments

Texas Instruments: Finding the Gcf

For Teachers 6th - 8th Standards
Students simplify fractions by dividing the numerator and denominator by the GCF (the greatest common factor). They check their work by using a calculator.
Activity
Texas Instruments

Texas Instruments: Greatest Common Factor

For Teachers 6th - 8th Standards
Students use a graphing calculator to find the Greatest Common Factor of two or more numbers.
Unit Plan
Mangahigh

Mangahigh: Number: Least Common Multiple and Greatest Common Factor

For Students 4th - 7th Standards
This site provides students practice with the concept of least common multiples and greatest common factors. Students can learn about the topic by completing an interactive tutorial. Students can then take a ten question timed test to...
Activity
Discovery Education

Discovery Education: Web Math: Factoring Polynomials by Finding the Gcf

For Students 9th - 10th
This WebMath online tool is useful for factoring polynomials by finding the greatest common factor. Simply plug the numbers in and you are on your way!
Unknown Type
McGraw Hill

Glencoe: Self Check Quizzes 1 Greatest Common Factor

For Students 9th - 10th Standards
Use Glencoe's randomly generated self-checking quiz to test your knowledge of how to find the greatest common factor. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click...
eBook
Mathigon

Mathigon: Math Foundations: Divisibility and Prime: Greatest Common Factors

For Students 6th - 8th Standards
This lesson focuses on the greatest common factors it poses real situations and asks students answer them and then it provides more information and more exercises.
Lesson Plan
Better Lesson

Better Lesson: Gcf and Lcm Project, Day 2

For Teachers 6th Standards
Sixth graders find the greatest common factor and least common multiple of numbers.
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...
Lesson Plan
University of Nottingham

Mars: Finding Factors and Multiples

For Teachers 6th Standards
This instructional activity is intended to help you to assess how well students are able to understand the meanings of the terms 'Greatest Common Factor' (GCF) and 'Least Common Multiple' (LCM). PowerPoint slides are provided for this...
Unit Plan
Khan Academy

Khan Academy: Gcf & Lcm Word Problems

For Students 5th - 7th Standards
Solve word problems where you either need to find the GCF or LCM. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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.

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