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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.
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.
Unknown Type
Lesson Tutor

Lesson Tutor: Divisibility Rules Worksheet

For Students 3rd - 8th
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...
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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.
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.
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.
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.
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.
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...
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
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.
Activity
University of Cambridge

University of Cambridge: Nrich: A Conversation Piece

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

University of Cambridge: Nrich: Divide It Out!

For Students Pre-K - 1st Standards
On this one page website sharpen your logic and basic division fact skills while working on this challenge. The solution is available to double check your solution.
Activity
University of Cambridge

University of Cambridge: Nrich: Two Primes Make One Square

For Students 3rd - 8th
On this one page website sharpen your logic, prime numbers and square numbers skills while working on this challenge. The solution is available to double check your solution.
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
AAA Math

Aaa Math: Counting Even Numbers by Twos

For Students K - 1st Standards
Use this lesson to learn about adding two and skip counting to understanding the concepts of counting even numbers by twos. Play the interactive game "Counting Up By Twos," and get your score instantly.
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.
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...