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This is a module for use in differential or integral calculus. It looks at a differential equation model for world population growth.
This module uses the problem of modeling growth in a chambered nautilus shell to give the user experience with the concepts of polar coordinates and parametric curves.

A mathlet that illustrates the relationship between the graphs of the natural sine and cosine curves and the vertical and horizontal coordinates of points on the unit circle.

This module a standard model of population growth in a constrained environment.

The use of JavaMath is explained via an example and ideas for new types of web service are discussed.

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 article that presents an interactive, tactile, real-time proof of the parity theorem for permutations

An article about software tools that have been developed in Geometer's Sketchpad to aid in constructions in non-Euclidean geometry

The Editor's update for Issue 3 of Volume 1

An article about an online system for providing education and assessment for precalculus, which can substitute for routine problems given in homework and as exam questions