San Diego State University
San Diego State University: Divisibility War
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!
National Council of Teachers of Mathematics
The Math Forum: Basic Divisibility Rules
This site offers a short quick reference list of divisibility rules with links to the explanations
Mathigon
Mathigon: Math Foundations: Divisibility and Primes: Factors and Multiples
This lesson focuses on factors and multiples; it explains each and provides practice activities and a quiz.
Better Lesson
Better Lesson: Divisibility Rules for 6 and 9
Sixth graders use calculators to find the shortcut for dividing with 6 and 9.
Math Slice
Math Slice: Divisibility
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.
ClassFlow
Class Flow: Divisibility & Factorials
[Free Registration/Login Required] Testing for divisibility of 0, 2, 3, 4, 5, 9, 10 & 11. This flipchart explores factorials and perfect numbers as well.
Mathigon
Mathigon: Math Foundations: Divisibility and Primes: The Distribution of Primes
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...
Lesson Tutor
Lesson Tutor: Divisibility Rules
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.
Quia
Quia: Divisibility and Prime
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...
Mathigon
Mathigon: Math Foundations: Divisibility and Prime: Greatest Common Factors
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.
Mathigon
Mathigon: Math Foundations: Divisibility and Prime: Least Common Multiples
This lesson features practical applications for finding the least common multiples.
Mathigon
Mathigon: Math Foundations: Divisibility and Primes: Prime Numbers
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.
Other
Thales: Divisibilidad
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.
Illustrative Mathematics
Illustrative Mathematics: 4.oa Multiples of 3, 6, and 7
This task investigates divisibility properties for the numbers 3, 6, and 7. Aligns with 4.OA.C.
Better Lesson
Better Lesson: Basic Fractions on a Number Line (Divisible by Two)
Third graders create number lines to represent benchmark fractions.
Lesson Tutor
Lesson Tutor: Divisibility Rules Worksheet
A worksheet of twenty practice problems is given here for students 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 to the...
Texas Instruments
Texas Instruments: A Prime Investigation With 7, 11, and 13
Students investigate the divisibility of 7, 11, and 13. They will also discover an interesting characteristic of six-digit multiples of 1001.
Other
Project Happy Child: 100s Board Worksheets
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.
Illustrative Mathematics
Illustrative Mathematics: 4.oa Multiples of Nine
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.
Stefan Warner and Steven R. Costenoble
Finite Mathematics & Applied Calculus: Predicate Calculus
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...
E-learning for Kids
E Learning for Kids: Math: Penguins: Division
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...
ClassFlow
Class Flow: Number Sense Related to Division
[Free Registration/Login Required] This flipchart introduces divisibility, primes and composites, averages, and estimating quotients.
ClassFlow
Class Flow: Biz Buzz
[Free Registration/Login Required] Discover and apply divisibility rules for 2, 3 and 6.
Other
Historical Narratives of Early Canada: One Kingdom Divisible
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...
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