PBS
Pbs: Greatest Common Factor
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...
Homeschool Math
Homeschool Math: Prime Factorization
This site contains a free lesson on Prime Factorization in which students learn by doing practice problems.
Other
Global Classroom: Kidspiration Math Templates
Download the Kidspiration templates to be used as supplemental math resources. Templates include the following elementary math topics: fractional parts, ordering fractions, multiplication, place value, matching shapes, ordering numbers,...