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Activity
Other

Greatest Common Factor/definition and Example

For Students 9th - 10th
A walkthrough example of the discovery of the GCF of three numbers. Contains a definition as well.
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Lesson Plan
Google

Google for Education: Measuring Complexity of Function or Algorithm

For Teachers 9th - 10th Standards
In this activity, students learn how to measure the complexity of the function or algorithm in a math problem and understand how this applies to real world situations.
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Graphic
Cool Math

Coolmath: Pre Algebra Factorizations

For Students 9th - 10th
Learn about "factorization" from Cool Math. Several examples and practice problems are provided.
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Unit Plan
PBS

Pbs Learning Media: Patterns of Factors

For Students 6th - 8th
Demonstrate your grasp of patterns and factors by sorting the numbers into the correct columns. This interactive table focuses on factor pairs and prime factors for the numbers 2 to 36.
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Interactive
Calculator Soup

Calculator Soup: Greatest Common Factor Gcf Calculator

For Students 6th - 8th Standards
Calculate GCF, GCD, and HCF of a set of two or more numbers and see the work using factorization. An interactive calculator, explanations, and examples are included.
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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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Handout
Quia

Ixl Learning: Least Common Multiple

For Students 5th - 6th Standards
Brush up on your math skills relating to the least common multiple then try some practice problems to test your understanding.
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Graphic
Curated OER

Clip Art by Phillip Martin: Prime and Composite Numbers

For Students 3rd - 8th
A clipart illustration by Phillip Martin titled "Prime and Composite Numbers."
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Website
PBS

Pbs Learning Media: Pizza Toppings

For Students 6th - 8th Standards
This Cyberchase video features Bianca who uses Venn Diagrams to make a pizza that satisfies the topping preferences of her friends.
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Activity
Instituto Latinoamericano de la Comunicacion Educativa

Red Escolar: Brincos Y Numeros

For Students 3rd - 5th Standards
In Spanish. Find patterns with numbers less than 50. Also there is an activity to introduce the concept of multiplication.
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Activity
Other

Help With Fractions: The Greatest Common Factor

For Students 3rd - 8th Standards
Two different methods of finding the greatest common factor are explained at this one page website. It is very easy to follow the step by step directions.
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Activity
University of Cambridge

University of Cambridge: Nrich: Funny Factorisation

For Students 6th - 9th
Learning exercise deals with factors and factorization.
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Unknown Type
University of Vienna (Austria)

University of Vienna: Set of Solutions

For Students 9th - 10th Standards
Interactive assessment in which the solution set of an equation is found. Combines equation solving skills with set notation, introduces empty sets, intersections, subsets of real numbers (rational, integer, prime, etc.).
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Activity
University of Cambridge

University of Cambridge: Nrich: Tom's Number

For Students 3rd - 8th
Use the clues Tom gives you to figure out his number. The solution is right there on this one page website.
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Unit Plan
PBS

Pbs: Greatest Common Factor

For Students 6th - 8th Standards
In this video, learn how to find the greatest common factor of two numbers. Then, see how this can be used to solve problems with large numbers. In the accompanying classroom activity, students learn to find prime factors using factor...
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Interactive
Calculator Soup

Calculator Soup: Factoring Calculator

For Students 9th - 10th
The factoring calculator finds the factors and factor pairs of a positive or negative number. Enter an integer number to find its factors.
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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...