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The dihedral group D8 (sometimes called D4), the group of symmetries of the square, is one of the simplest finite groups. In these three mathlets, we will explore different aspects of this symmetry group to get a better understanding of its structure.
This interactive, browser-based game provides students with a great activity for the "reform calculus" problem of finding "function-derivative pairs" based only on graphs. Several variations are available.
This is a module for use in differential or integral calculus. It looks at a differential equation model for world population growth.
This article highlights several new modules in the ESTEEM collection maintained by the BioQuest Curriculum Consortium.
This set of four pages leads students through an introduction to standard set theory notation and the use of Venn diagrams. Java applets are used to give students random questions to which they respond with a graphical (point and click) interface.

A module that uses Riemann sums and other numerical methods to investigate of the area of a complex region, specifically, a map of Virginia

An article describing the WWW Interactive Mathematics Server (WIMS), designed for supporting intensive mathematics work via the Internet with server-side interactivity.
The Flash Forum resource shows velocity and acceleration vectors for an arbitrary parametric curve in space, and provides built in examples. Flash source code is provided.
Graph functions, zoom on points, and find points of intersection of multiple graphs.
A suite of mathlets for interactive exploration of quadric surfaces