One of the problems we encounter while teaching calculus is that many students do not have the mathematical skills which are essential for success. This is true even though the prerequisite courses (College Algebra and Trig) have been passed. To address this problem, the Mathematics Department of the University of Arizona decided to do the following. Write a computer program which a student can use before starting calculus. This program would quiz the student on all sections of algebra and trig which are essential to calculus. The whole purpose of the program would be to hone the student's skills in those parts of algebra and trig which are essential for success in calculus. This program quizzes students in the following areas: Greek symbols, elementary trigonometry, elementary algebra, factoring, fractions, exponents, functions and equations, inequalities, curves, functions from formulas, and trigonometric identities.

(from the documentation)