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One of the contributing editors introduces the Developers' Area.

Exploring Geometric Transformations in a Dynamic Environment

A collection of GeoGebra applets and activities for exploring the properties of reflections, rotations, translations and glide reflections in the plane.

Biodiversity

This ESTEEM module in the Ecology Category consists of an Excel workbook that allows the diversity of a biological population to be estimated with both the Shannon and Simpson biodiversity indices based on information theory.

Derivative Matching Game

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.

World Population Growth

This is a module for use in differential or integral calculus. It looks at a differential equation model for world population growth.

Venn Diagrams

This application allows randomized Venn Diagram review and self-testing implemented in Flash.

Truth Table Applet

This straightforward Java applet parses statements from propositional logic and displays their truth tables in a format consistent with most discrete math texts.

Estimating the Area of Virginia

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

WIMS: An Interactive Mathematics Server

An article describing the WWW Interactive Mathematics Server (WIMS), designed for supporting intensive mathematics work via the Internet with server-side interactivity.