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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

An article that explores visual patterns in Pascal triangles with entries determined by arithmetic in finite groups