This is an elementary introduction to polynomials.

http://www.purplemath.com/modules/polydefs.htm

This is an elementary introduction to multiplying polynomials.

http://www.purplemath.com/modules/polymult.htm

This first part of this site provides some practice polynomial terminology, and with working with polynomials. It has some nice links.

http://www.wtamu.edu/academic/anns/mps/math/mathlab/int_algebra/int_alg_tut25_poly.htm

This is an excellent site providing interactive practice with the binomial theorem.

http://www.themathpage.com/aPreCalc/binomial-theorem.htm

An interactive version of Pascal’s Triangle.

http://mathforum.org/dr.cgi/pascal.cgi