Math Medics
S.o.s. Math: Composition of Functions
This lesson defines Composition of Functions and works several examples. This lesson considers two methods of evaluating compositions, extensively explaining both.
University of Saskatchewan (Canada)
University of Saskatchewan: Composition of Functions
This unique site allows one to enter two functions from a list of options, graphs both functions and their composition, then allows the user to trace any of the three via the java applet.