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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.
An interactive and visually appealing mathlet for exploring convergence, divergence, and distribution of terms of sequences and series of constants.
This article describes the Method of Characteristics for solving first-order PDE's and applies the method to solve nonlinear hyperbolic conservation laws.

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.
Instructions for citing articles, modules, and mathlets in JOMA
Three applets allow you to interact with the puzzle described in the April 2009 Mathematics Magazine article by Alex Fink and Richard Guy.
A Biological ESTEEM module from the Ecology Category. This Excel workbook uses the Leslie Matrix Model for population projection of age-class or stage-class structured populations.

This teaching module explores the time and distance of a bouncing ball and leads to a study of the geometric series.

A module about motion in one, two, and three dimensions and the process of changing the point (and direction) of reference from which the motion is viewed