Precalculus

The Complete Idiot's Guide to Precalculus, at Amazon USA
Pre-Calculus Demystified, at Amazon USA
Math for Morons Like Us need to know Algebra I & II already
Precalculus Tutorial
Wikipedia
Topics in Pre-Calculus
The Math Forum
OJK's Precalculus Study Page
Pre-Calculus Software
Problems
Pre-Calculus problems
Memphis Educational Computer Connectivity Alliance
CLEP


Calculus