Unit Plan
Scholastic

Scholastic: Study Jams! Math: Multiplication and Division: Multiples

For Students 3rd - 6th
This site provides great practice on the concept of multiples. Students can first learn about the topic by watching a step by step instruction video that also points out areas of concern. Finally, students can practice their knowledge by...
Unit Plan
Khan Academy

Khan Academy: Prime and Composite Numbers Intro

For Students 4th Standards
Discusses factors, prime and composite numbers, and why the number 1 is not prime or composite. Includes practice problems throughout, along with explanations of solutions.
Unit Plan
Goodwill

Gcf Global: Reciprocals and Inverse Numbers

For Students 9th - 10th
Read this tutorial to learn about reciprocal and inverse numbers and how they work.
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That Quiz

That Quiz: Factores

For Students 9th - 10th Standards
Interactive practice tests dealing with factors. Students will practice the prime factors, greatest common factor and least common multiple.
Website
PBS

Pbs Learning Media: Harry the Substitute Teacher

For Students 3rd - 4th
Harry and his students look at various arrangements of classroom desks in this video from Cyberchase.
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.
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...
Interactive
AAA Math

Aaa Math: Least Common Multiple

For Students 3rd - 8th Standards
This tutorial offers an explanation of least common multiples, practice finding them and a game to play. There is a lot of information available at this location.
Activity
Discovery Education

Discovery Education: Web Math: Find the Least Common Multiple of Some Numbers

For Students 3rd - 8th Standards
Use this site to find the Least Common Multiple (LCM) of any set of numbers. Simply type in your numbers, and the site will provide the answer complete with a full explanation.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: Picturing Factors in Different Orders

For Teachers 5th - 8th
The purpose of this task is to help learners picture the multiplicative structure of the number 30 in different ways. Some of this structure is easier to communicate using grouping symbols, as it is easier to interpret...
Activity
AAA Math

Aaa Math: Prime and Composite Numbers

For Students 3rd - 8th Standards
This math tutorial offers an explanation of prime and composite numbers and lets students practice finding them.
eBook
Mathigon

Mathigon: Math Foundations: Divisibility and Primes: Divisibility Rules

For Students 6th - 8th
There are a few different rules that can make it easy to check if a number is divisible by another. In this lesson you will learn some of them such as,any number that ends in 0, 2, 4, 6, or 8 is divisible by 2, divisibility by 5 we...
Activity
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Greatest Common Factors, Least Common Multiples

For Students 9th - 10th
Math Forum response to request for info on how to find greatest common factors, and how this compares to least common multiples. Explanation includes examples of each.
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McGraw Hill

Glencoe Online: Abiotic Factors

For Students 6th - 8th
Take this 8 question check quiz on abiotic factors. The quiz is multiple choice.
Interactive
Mangahigh

Mangahigh: Number: Prime Numbers

For Students 5th - 7th
Explore factors and multiples to determine prime numbers.
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Illustrative Mathematics

Illustrative Mathematics: 4.oa the Locker Game

For Teachers 3rd - 5th Standards
The purpose of this instructional task is for students to deepen their understanding of factors and multiples of whole numbers. Aligns with 4.OA.B.4.
Interactive
National Council of Teachers of Mathematics

Nctm: Illuminations: Product Game

For Students 3rd - 8th
The Product Game is a fun, interactive game that exercises your skill with factors and multiples.
Activity
University of Cambridge

University of Cambridge: Nrich: Making Sticks

For Students 3rd - 8th Standards
On this one page website sharpen your logic, factors, and multiples skills while working on this challenge. The solution is available to double check your solution.
Activity
University of Cambridge

University of Cambridge: Nrich: Block Four

For Students 3rd - 5th
On this one page website sharpen your logic, factors, and multiples skills while working on this challenge. The solution is available to double check your solution.
Activity
Texas Instruments

Texas Instruments: Oliver's Method

For Teachers 6th - 8th Standards
Students discover a relationship between the Greatest Common Factor (GCF) and the Least Common Multiple (LCM) of two numbers. Students will find and justify the relationship that the product of two numbers is equal to the product of the...
Interactive
Topmarks Online

Topmarks: Multiples and Factors

For Students 4th - 6th Standards
A multiple-choice game with two game modes. In the first, you need to identify the Lowest Common Multiple and in the second the Highest Common Factor. Questions increase in difficulty depending on accuracy.
Unit Plan
Khan Academy

Khan Academy: Greatest Common Factor

For Students 5th - 7th Standards
Find the greatest common factor of 2 or 3 integers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Lesson Plan
Better Lesson

Better Lesson: Review & Assessment 6.ns.a.1 and 6.ns.b.4

For Teachers 6th Standards
This lesson brings all the pieces together to have students show the how's and why's by using GCF,LCM, Distributive property and dividing fractions.
Handout
Paul Dawkins

Paul's Online Notes: Algebra: Zeroes/roots of Polynomials

For Students 9th - 10th Standards
Learn about the root or zero of a polynomial with this reference guide. Includes definitions, step-by-step instructions on how to find all the zeroes for a given polynomial, and multiple examples. Also included is a description of The...

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