Lesson Plan
National Council of Teachers of Mathematics

The Math Forum: Divisibility Test Game "Nullo"

For Teachers 9th - 10th Standards
The lesson plan for two to four players engaged in an active card game to determine the divisibility of a number. The materials needed, the rules of the game, and the methods of scoring are all explained for the teacher.
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McGraw Hill

Glencoe: Self Check Quizzes 1 Divisibility Patterns

For Students 9th - 10th
Use Glencoe's randomly generated self-checking quiz to test your knowledge of divisibility patterns. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the "Check It"...
Unit Plan
CK-12 Foundation

Ck 12: Arithmetic: Divisibility Rules to Find Factors

For Students 6th
[Free Registration/Login may be required to access all resource tools.] Determine the factors of given numbers using divisibility rules.
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Divisibility Tests

For Students 9th - 10th Standards
Find a quick, concise explanation of how to use the rules for divisibility by the numbers 2 through 10. Examples are given and clearly explained for each of the divisibility rules.
Lesson Plan
Homeschool Math

Homeschool Math: Divisibility Rules

For Students 5th - 6th
This is a complete lesson about the concept of divisibility and common divisibility rules. It briefly reviews the concepts of factor, divisor, and a number being divisible by another. Then, the "easy" divisibility rules by 2, 5, 10, 100,...
Handout
Lesson Tutor

Lesson Tutor: Divisibility Rules

For Students 3rd - 8th
A handy table of the rules of division is presented here. Examples are given for each of the rules, from the number 2 to the number 10. The site stresses that a list such as this isn't cheating, but rather a nice resource to have.
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Lesson Tutor

Lesson Tutor: Divisibility Rules Worksheet

For Students 3rd - 8th
A instructional activity of twenty practice problems is given here for learners wishing more help with the concept of reducing fractions down to their lowest terms. The first several questions are accompanied with explanation, and a link...
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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.
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...
Activity
Lawrence Hall of Science

The Math Page: Skill in Arithmetic: The Meaning of Division

For Students 3rd - 8th
This Math Page tutorial explains and defines the concept of division. There is a practice section at the end of the lesson.
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...
Unit Plan
Scholastic

Scholastic: Study Jams! Math: Multiplication and Division: Divisibility Rules

For Students 3rd - 7th
This site provides great practice on the concept of divisibility rules. 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...
Unit Plan
CK-12 Foundation

Ck 12: Chemistry: Democritus' Idea of the Atom

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Explains the ideas of Democritus dealing with the divisibility of the atom.
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Math Slice

Math Slice: Divisibility

For Students 3rd - 8th
This resource contains timed practice for divisibility rules. There is a link to an explanation of the divisibility rules. Students receive instant feedback and an opportunity to practice again.
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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.
Activity
National Council of Teachers of Mathematics

The Math Forum: Beat the Calculator: Adding Even Numbers

For Students 4th - 6th Standards
Can you beat the calculator? Your task is to find the sum of all even numbers between two and any selected two-digit even number. If you can find the number pattern, you are sure to beat the calculator every time. Links to other "Beat...
Activity
The Math League

The Math League: Whole Numbers & Basic Properties

For Students 3rd - 8th Standards
Here is a nice resource for students and teachers about whole numbers and their basic properties. It provides links to information on place value, expanded form, and rounding numbers are just a few of the topics on this page.
eBook
Mathigon

Mathigon: Math Foundations: Divisibility and Primes: Real Life Applications

For Students 6th - 8th
This lesson provides real life applications for divisibility and prime numbers including the Cicada Cycle's use of prime numbers and Cryptography,encryption.
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.
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.
Unit Plan
CK-12 Foundation

Ck 12: Arithmetic: Division of Decimals by Decimals

For Students 6th
[Free Registration/Login may be required to access all resource tools.] Find the quotient of two decimals by changing divisors into whole numbers.
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...
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
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!