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A mathlet that allows the user to input a sequence of 0's and 1's of length 20 and then tests the sequence for randomness using three different tests.
An interactive module to study numerical and graphical solutions of differential equations in first-semester calculus.
This collection of mathlets comprise a companion for modeling assignments (primarily for calculus) designed to give students hands-on experience describing motion as a combination of basic functions.
This applet supplements the authors' "Gutter Problem" material, but can be used to generally study properties and forms of quadratic functions, both analytically and graphically.

A tribute to one of our authors, who died suddenly and unexpectedly while his second JOMA contribution was in preparation.

An article in which the focus-locus, focus-directrix, and cone-slicing descriptions of ellipses are related by way of the space-time geometry of special relativity.

The curve traced out on a baseball by its seam has many symmetries. This article explores the class of closed spherical curves with the same symmetries, which we call generalized baseball curves.

This utility uses the free Flash player plug-in resident in most browsers to allow the user to plot parametrically defined surfaces in cylindrical coordinates. Many examples and directed exercises are included.

An article on Group Explorer, a system that uses graphical representations of groups to build intuition.

A mathlet to sketch a derivative function by hand or by recording slopes of tangent lines.