Reference Topics 6-2
Here is some practice factoring trinomials using FOIL.
http://www.mathwizz.com/algebra/help/help3.htm
Here is some practice factoring difference of squares:
http://www.purplemath.com/modules/specfact.htm
This excellent Khan Academy site give extra practice in factoring:
https://www.khanacademy.org/math/algebra/polynomial-factorization/factoring-quadratics-1/e/factoring_polynomials_1… See the whole entry