CK-12 Foundation
Ck 12: Elem Math: Identifying Prime or Composite Numbers
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to identify prime and composite numbers. Includes video demonstrating a sample problem [1:30] and a set of practice...
Khan Academy
Khan Academy: Prime and Composite Numbers Intro
Discusses factors, prime and composite numbers, and why the number 1 is not prime or composite. Includes practice problems throughout, along with explanations of solutions.
AAA Math
Aaa Math: Prime and Composite Numbers
This math tutorial offers an explanation of prime and composite numbers and lets students practice finding them.
Cool Math
Coolmath: Pre Algebra Prime and Composite Numbers
Students can learn the definitions of "prime numbers" and "composite numbers" with this resource. Several pages are provided that show students how to break down composite numbers until only prime numbers are left.
Quia
Ixl Learning: Prime and Composite Numbers
Brush up on your math skills relating to prime and composite numbers then try some practice problems to test your understanding.
Cuemath
Cuemath: Composite Numbers
In this article, you will learn the difference between prime and composite numbers, the smallest composite number, and odd composite numbers. Included are solved examples and interactive problems for review.
ClassFlow
Class Flow: Working With Prime and Composite Numbers
[Free Registration/Login Required] This flipchart allows students to practice working with prime and composite numbers. Students learn how to do prime factorization.
CK-12 Foundation
Ck 12: Arithmetic: Prime and Composite Numbers
[Free Registration/Login may be required to access all resource tools.] Identify and classify numbers as either prime or composite.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Composite Numbers
Find a quick, concise explanation of Composite Numbers. Several examples are given and clearly explained. Prime numbers are also described.
Khan Academy
Khan Academy: Identify Composite Numbers
Identify composite numbers less than 100. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Scholastic
Scholastic: Study Jams! Math: Multiplication & Division: Prime Numbers
This site provides great practice on the concept of prime and composite numbers. 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...
Other
Help With Fractions: Prime Numbers Chart
Prime and composite numbers are defined on this website. A prime number chart is also included for all prime numbers under 10,000.
Alabama Learning Exchange
Alex: Hanging Out With Prime Factorization
During this lesson, students will review factors, prime and composite numbers. Students will also create a mobile that show the prime factorization of the number of their choice. This lesson plan was created as a result of the Girls...
ABCya
Ab Cya: Adventure Man Dungeon Dash Numbers
Adventure Man is back once again, but this time with the help of fearless friend Danger Dame! Help them dash their way through the Numbers Dungeon while collecting gold, gems, and answering questions about odd, even, prime, and composite...
E-learning for Kids
E Learning for Kids: Math: Ice Cream Shop: Numbers to 100,000,000
On this interactive site students learn to read and write large numbers in numerals, round numbers to millions, and locate prime and composite numbers.
ClassFlow
Class Flow: Factoring, Prime and Composite
[Free Registration/Login Required] This flipchart defines factors, prime number, and composite numbers. It gives step-by-step instructions on how to list all the factors of a whole number and then identify the number as a prime number or...
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: The Prime Page
Find a quick, concise but complete explanation of prime numbers. A variety of related topics are covered such as: A table of the first 400 Prime Numbers, Do Primes ever stop?, the Prime Number Theorem and Twin Primes.
Curated OER
Clip Art by Phillip Martin: Prime and Composite Numbers
A clipart illustration by Phillip Martin titled "Prime and Composite Numbers."
Alabama Learning Exchange
Alex: Exploring Prime Numbers
Exploring Prime Numbers is a hands-on, minds-on math activity that engages students in the discovery of prime numbers through the construction of multiplication arrays. Students then extend on their background knowledge of multiples and...
Wolfram Research
Wolfram Math World: Prime Number
Prime Numbers are defined with a glossary hyperlink to terms used in the definition. Lots of information and examples included. Lists many math-related links. Scroll down to the bottom of the page to see how prime numbers are used in the...
McGraw Hill
Glencoe: Self Check Quizzes 1 Prime Factors
Use Glencoe's randomly generated self-checking quiz to test your knowledge of prime factors. 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" button and...
Scholastic
Scholastic: Study Jams! Math: Multiplication & Division: Prime Factorization
This site provides great practice on the concept of prime factorization. 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...
Math Open Reference
Math Open Reference: Prime Number
Learn about prime numbers with this handy reference guide. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.
Amby Duncan-Carr
Prime Factorization: Amby's Resources
What is prime factorization? This site goes through a step-by step process explaining different ways to find the prime factorization.