Worksheet
Curated OER

Factors Game

For Students 6th - 8th
In this factors game learning exercise, teams of middle schoolers identify factors.  They find proper factors of a given number  This one-page learning exercise cotnains approximately 40 problems.
Worksheet
Curated OER

Greatest Common Factor #2

For Students 4th - 5th
In this GCF worksheet, students fill in missing number in factor trees, then determine whether numbers are prime or composite. Worksheet includes links to answers and additional worksheets.
Worksheet
Curated OER

Number Theory: The Sieve of Eratosthenes

For Students 4th - 6th
In this number theory worksheet, students read about The Sieve of Eratosthenes and follow a set of directions to complete a prime number activity and answer 4 related questions.
Worksheet
Curated OER

Division word problems

For Students 5th - 8th
In this division worksheet, students complete division word problems. Students complete 10 multiplication problems that pertain to the concept of division.
Worksheet
Curated OER

Find Factors of a Number

For Students 4th - 7th
In this finding factors practice worksheet, students sharpen their problem solving skills as they solve 6 story problems.
Unknown Type
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.