Khan Academy on a Stick
Precalculus
You may think that precalculus is simply the course you take before calculus. You would be right, of course, but that definition doesn't mean anything unless you have some knowledge of what calculus is. Let's keep it simple, shall we? Calculus is a conceptual framework which provides systematic techniques for solving problems. These problems are appropriately applicable to analytic geometry and algebra. Therefore....precalculus gives you the background for the mathematical concepts, problems, issues and techniques that appear in calculus, including trigonometry, functions, complex numbers, vectors, matrices, and others. There you have it ladies and gentlemen....and introduction to precalculus!
 Vectors (17 videos)

Matrices
(36 videos)
Understanding and solving matrices.

Parametric equations and polar coordinates
(7 videos)
An alternative to Cartesian coordinates.

Imaginary and complex numbers
(26 videos)
Understanding i and the complex plane

Probability and combinatorics
(40 videos)
Basics of probability and combinatorics

Sequences, series and induction
(29 videos)
An assortment of concepts in math that help us deal with sequences and proofs.

Hyperbolic functions
(2 videos)
Motivation and understanding of hyperbolic functions.

Limits
(8 videos)
Preview of the calculus topic of limits