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"Free tutorials using java applets to explore, interactively, important topics in precalculus such as quadratic, rational, exponential, logarithmic, trigonometric, polynomial, absolute value functions and their graphs. Equations of lines, circles, ellipses, hyperbolas and parabolas are also explored interactively. Graph shifting, scaling and reflection are also included. The definition and properties of inverse functions are thoroughly investigated. A graphical approach to 2 by 2 systems of equations is included. "

This is a series of videos about doodling in math class. They relate, although sometimes loosely, to topics from geometry, algebra, trigonometry, and precalculus. Very fun to show students as a side-note to regular lessons.

Microsoft Mathematics 4.0 teacher guide http://bit.ly/ekQiX1from basic math to precalculus- visualize math concepts...???