eBook
Khan Academy

Khan Academy: Intro to Factors & Divisibility

For Students 9th - 10th Standards
Learn what it means for polynomials to be factors of other polynomials or to be divisible by them.
Lesson Plan
Better Lesson

Better Lesson: Divisibility Rules and Properties of Math Quiz

For Teachers 6th Standards
SWBAT show their understanding of the divisibility rules.
Lesson Plan
Better Lesson

Better Lesson: Divisibility Rules Foldable

For Teachers 6th Standards
A hot dog fold serves as a divisibility rules study guide.
Interactive
Quia

Quia: Divisibility and Prime

For Students 3rd - 8th Standards
If you enjoy playing the game Battle Ship you will enjoy this game. When you locate an enemy ship to get the hit you must correctly answer a question using your knowledge of divisibility rules and prime numbers. It is a fun way to...
Lesson Plan
San Diego State University

San Diego State University: Divisibility War

For Teachers 9th - 10th
This site offers the rules of divisibility and a game for practicing those rules. Everything is included in the site for making this game. Don't be discouraged by the length of the explanations!
Activity
National Council of Teachers of Mathematics

The Math Forum: Basic Divisibility Rules

For Students 9th - 10th
This site offers a short quick reference list of divisibility rules with links to the explanations
eBook
Mathigon

Mathigon: Math Foundations: Divisibility and Primes: Factors and Multiples

For Students 6th - 8th
This lesson focuses on factors and multiples; it explains each and provides practice activities and a quiz.
Lesson Plan
Better Lesson

Better Lesson: Divisibility Rules for 6 and 9

For Teachers 6th
Sixth graders use calculators to find the shortcut for dividing with 6 and 9.
Activity
Other

Thales: Divisibilidad

For Students 9th - 10th
Spanish content. Online lessons explaining divisibility, most common dividers, and least common multiples. Shows step-by-step examples, followed by a few example problems and solutions.
Unknown Type
Illustrative Mathematics

Illustrative Mathematics: 4.oa Multiples of 3, 6, and 7

For Teachers 3rd - 5th Standards
This task investigates divisibility properties for the numbers 3, 6, and 7. Aligns with 4.OA.C.
Activity
Texas Instruments

Texas Instruments: A Prime Investigation With 7, 11, and 13

For Teachers 6th - 8th
Students investigate the divisibility of 7, 11, and 13. They will also discover an interesting characteristic of six-digit multiples of 1001.
eBook
Mathigon

Mathigon: Math Foundations: Divisibility and Primes: The Distribution of Primes

For Students 6th - 8th
This lesson focuses on the distribution of large prime numbers. It offers a calculator to check numbers for prime and a calculator that allows you to create prime numbers. It also provides the history of methods find the distribution of...
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.
eBook
Mathigon

Mathigon: Math Foundations: Divisibility and Prime: Least Common Multiples

For Students 6th - 8th Standards
This lesson features practical applications for finding the least common multiples.
eBook
Mathigon

Mathigon: Math Foundations: Divisibility and Primes: Prime Numbers

For Students 6th - 8th
This lesson focuses on prime numbers, numbers that can only be divided by one and itself. It explains the Fundamental Theorem of Arithmetic and the Sieve of Eratosthenes. Includes practice activities.
Unknown Type
Illustrative Mathematics

Illustrative Mathematics: 4.oa Multiples of Nine

For Teachers 3rd - 5th Standards
This task examines the interesting fact that when a number is divisible by 9 then the sum of its digits is also divisible by 9. Aligns with 4.OA.C.5.
Lesson Plan
Better Lesson

Better Lesson: Basic Fractions on a Number Line (Divisible by Two)

For Teachers 3rd Standards
Third graders create number lines to represent benchmark fractions.
Activity
Stefan Warner and Steven R. Costenoble

Finite Mathematics & Applied Calculus: Predicate Calculus

For Students 9th - 10th Standards
The resource investigates predicate calculus. The tutorial examines propositional calculus, universal quantifiers, mathematical statements, and divisibility. Students learn about the logic concepts through notes and examples. Practice...
Handout
Other

Historical Narratives of Early Canada: One Kingdom Divisible

For Students 9th - 10th
This web page examines Benjamin Franklin, the Boston Tea Party, First Continental Congress, and the Second Continental Congress in 1775, where Canadians were invited to attend. Learn more about the flow of revolution and loyalty on each...
Graphic
Other

Project Happy Child: 100s Board Worksheets

For Students Pre-K - 1st Standards
Use these 100s Boards to have students check for divisibility by 2-12 and for square and prime numbers. Just find the links below the 100s board that has the directions printed right on top of the worksheet.
Unit Plan
E-learning for Kids

E Learning for Kids: Math: Penguins: Division

For Students 3rd - 5th Standards
This interactive site allows students to practice their division skills. At the end of the lesson students will be able to divide mentally using divisibility tests, solve word problems using division strategies, and use a written...
Unit Plan
TED Talks

Ted: Ted Ed: Why Can't You Divide by Zero?

For Students 9th - 10th
Learn about the math rule that says we cannot divide by zero.
Whiteboard
ClassFlow

Class Flow: Number Sense Related to Division

For Teachers 3rd - 5th Standards
[Free Registration/Login Required] This flipchart introduces divisibility, primes and composites, averages, and estimating quotients.
Whiteboard
ClassFlow

Class Flow: Biz Buzz

For Teachers 3rd - 5th
[Free Registration/Login Required] Discover and apply divisibility rules for 2, 3 and 6.

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