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University of Waterloo (Canada)

Wired Math: Primes and Prime Factors [Pdf]

For Students 3rd - 8th Standards
Explore primes, prime factors, and composites using this collection of worksheets. Lots of detailed examples, interesting math facts, and colorful visuals. Acrobat Reader required.
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...
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.