Use a simple formula to help you figure out the age of the mathematician Augustus de Morgan. When done, check your results against the solution.

This resource provides a list of polynomial identities, including formulas for squaring a binomial, FOILing a trinomial, factoring a difference of two squares, factoring a sum or difference of two cubes, and the Quadratic Formula.

Learn and practice permutations and finding probabilities. Teacher resource page included.

Learn how to solve equations that contain more than one variable.

This site displays formulas and examples, pertaining to slope, for parallel and perpendicular lines.

Given the graph of a nonlinear piecewise function, find its formula. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Evaluate functions for specific inputs given the formula of the function. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.

Who was Pythagoras and what is his theorem? Explore this concept and its relationship to the measurement of a right triangle in this test prep lesson plan. The lesson includes an interactive worksheet where middle schoolers discover the...

Casual and clear but definitely upper-level discussion of rational, real, imaginary, and several other types of numbers. Links to related sites.

This site from the University of Utah provides a good simple base conversion page.

Analyze quadratic equations in order to determine how many different real number solutions they have. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.