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Activity
Other

Dan's Math: Basic Skills Topics

For Students 9th - 10th Standards
College professor Dan Bach offers a review of various basic topics in arithmetic, pre-algebra, and algebra. Order of operations, exponents, square roots, variables, and combining terms are just a few of the many topics covered.
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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.
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Whiteboard
ClassFlow

Class Flow: Crct Review Day 4

For Teachers 3rd - 5th
[Free Registration/Login Required] This review for the Georgia CRCT covers factoring, prime numbers, graphing on coordinate plane.
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Handout
Other

The Prime Glossary: Rational Numbers

For Students 9th - 10th Standards
This site gives a definition of what a rational number is. Gives examples and formulas. Very helpful.
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Lesson Plan
Better Lesson

Better Lesson: Prime Factorization of Numbers

For Teachers 6th
Sixth graders will climb math trees.
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Activity
Varsity Tutors

Varsity Tutors: Hotmath: Graphing Calculator Practice Problems Number Theory

For Students 9th - 10th Standards
Practice using your graphing calculator for number theory problems, including prime factorization, greatest common factor, least common multiple, and scientific notation. If you get stumped or if you would like to check your work, then...
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Lesson Plan
Alabama Learning Exchange

Alex: My Favorite Number

For Teachers 4th - 7th
The activity allows students to review many of the number theory concepts. Students will pick a composite number write verbal expressions about the number, find the factors, prime factorization, list multiples, draw a cartoon character...
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Activity
Discovery Education

Discovery Education: Web Math: Factor an Integer

For Students 3rd - 8th Standards
WebMath gives a calculator to give all the factors of a number. Drop down menu can select just prime factors of number entered. Also discusses the definition of a factor.
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Activity
University of Cambridge

University of Cambridge: Nrich: Dominoes

For Students Pre-K - 1st
A set of online dominoes shows you how to work out multiplication problems.
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Unit Plan
E-learning for Kids

E Learning for Kids: Math: Amazon River Boat Trip: Multiplication and Division

For Students 3rd - 5th Standards
Explore prime and composite numbers, multiplication, and division with Julie throughout these interactive exercises.
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Handout
Math Open Reference

Math Open Reference: Number

For Students 9th - 10th
Resource defines numbers into two main categories, counting numbers and scalars. It also gives examples of number notation.
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Handout
Wolfram Research

Wolfram Math World: Pythagorean Triple

For Students 9th - 10th Standards
This site provides extensive information about Pythagorean triples. It begins by explaining its relation to the Pythagorean theorem, and then gives ways to generate Pythagorean triples using relatively prime numbers and Fibonacci numbers.
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eBook
Math Planet

Math Planet: Monomials and Adding or Subtracting Polynomials

For Students 6th - 8th
Gain an understanding of how to add or subtract polynomials by viewing an example and a video lesson.
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Unit Plan
Texas Education Agency

Texas Gateway: Applying the Order of Operations

For Students 5th - 7th Standards
Given a numerical expression including whole number exponents and prime factorization, students will use the order of operations to generate an equivalent expression.
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Website
Other

Cabinet and Ministry

For Students 9th - 10th
A list of current members of the Cabinet and Ministry is provided. Government address, phone numbers, email and web address are included.
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Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Greatest Common Factor 2

For Students 9th - 10th Standards
Twenty-four problems present a variety of problems working with finding the greatest common factor and finding prime factorizations. They are given with each step to the solution cleverly revealed one at a time. You can work each step of...
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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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Activity
Math Is Fun

Math Is Fun: All Factors of a Number

For Students 3rd - 8th Standards
Great tool that will find all factors of a number, not just the prime factors.
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Activity
Math Medics

S.o.s. Math: Factoring Integers

For Students 9th - 10th
This S.O.S. tutorial gives students a basic review of factoring integers. Follow the tutorial to refresh your skills involving the rules for factoring numbers. Contains practice problems with links to the answers.
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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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Whiteboard
ClassFlow

Class Flow: Number Sense Related to Division

For Teachers 3rd - 5th Standards
[Free Registration/Login Required] This flipchart introduces divisibility, primes and composites, averages, and estimating quotients.
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Handout
University of St. Andrews (UK)

University of St. Andrews: Marin Mersenne

For Students 9th - 10th
Even though his equation to determine all prime numbers did not succeed, it did help the investigation of large prime numbers.
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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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Activity
National Institute of Educational Technologies and Teacher Training (Spain)

Ministerio De Educacion: La Criba De Eratostenes

For Teachers 3rd - 5th Standards
Reinforce your knowledge about prime and composite numbers. Geogebra plugin required.

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