This online tutorial explains different topics in pre-calculus. Offers helpful information to explain different concepts. Good for review.

Math Forum has a site for problem of the week for Elementary, Middle, and High School. Subject areas include Pre-Algebra, Algebra, Geometry, and Pre-Calculus. Go through the archives of past problems dating back to 2001.

The Pre-Calculus session investigates exponential functions. Students learn about the concept through definitions and sample problems.