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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.
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.
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Math Aids

Math Aids: Division Worksheets

For Students K - 1st
Great resource for learning and practicing division. Math worksheets are printable, may be customized, and include answer keys.
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
Homeschool Math

Homeschool Math: Prime Factorization of Three Digit Numbers

For Teachers 5th
This lesson shows examples of how to get started with the prime factorization of three-digit or larger numbers, using a factor tree. includes numerous practice exercises.
Article
Cuemath

Cuemath: Factors

For Students 5th - 8th
A factor of a number in math is a number that divides the given number. Factors are used in many situations in daily life. This article explains factors and how to find factors using multiplication and division. Included are solved...
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AAA Math

Aaa Math: All About Division

For Students 3rd - 8th Standards
These tutorials teach division operations covered in K8 math courses. Each section has an explanation, interactive practice and challenge games about division.
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.
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: 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
Math Is Fun

Math Is Fun: Long Division to Decimal Places

For Students 3rd - 8th Standards
If you want to learn the traditional algorithm for long division when you divide to the decimal places, this website gives a very clear, simple step-by-step break down of the process. Students can solve six problems to practice the skill...
Interactive
Calculator Soup

Calculator Soup: Lcm Calculator Least Common Multiple

For Students 9th - 10th
The Least Common Multiple (LCM) is also referred to as the Lowest Common Multiple (LCM) and Least Common Divisor (LCD). For two integers a and b, denoted LCM(a,b), the LCM is the smallest positive integer that is evenly divisible by both...
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Other

Project Happy Child: Times Tables Division Worksheets

For Students Pre-K - 1st Standards
50 basic division worksheets are available at this web site. They can be printed and used for a variety of practice purposes. Some helpful hints are included to avoid mindless practice that could quickly become counter productive.
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.