Discovery Education
Discovery Education: Web Math: Factor a Polynomial With Three Terms Trinomials
This WebMath site allows a student to type in any trinomial and find the factorization of that trinomial and an explanation.
National Council of Teachers of Mathematics
Nctm: Illuminations: Factorize
With this activity, you can visually explore the concept of factors by creating rectangular arrays. The length and width of the array are factors of your number.
Math Aids
Math Aids: Factors Worksheets
Great resource for learning and practicing fractions and their different operations. Math worksheets are printable, may be customized, and include answer keys.