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A Biological ESTEEM module in the Genetics Category. This Excel workbook as two related applications, the Birthday Problem and Class Phenotypic Probabilities.
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 in the Phylogenetics Category. This workbook allows students to explore evolution over space and time using published data on the invasive plant Tamarix (salt cedar).

This teaching module uses Maple Maplets to illustrate several different methods of estimating the area of the unit circle.

A module to explore the properties of exponential functions through models of growth and decay
This dynamic Java applet allows the user to simultaneously plot multiple 3D surfaces, space curves, parametric surfaces, vector fields, contour plots, and more in a freely rotatable graph. This tool is intended as a dynamic visualization and exploration environment for multivariable calculus. Use it to illustrate the geometric relationships of many of the concepts of multivariable calculus, including dot and cross products, velocity and acceleration vectors for motion in the plane and in space, the TNB-frame, the osculating circle and curvature, surfaces, contour plots and level surfaces, partial derivatives, gradient vectors and gradient fields, Lagrange multiplier optimization, double integrals as volume, defining the limits of integration for double and triple integrals, parametric surfaces, vector fields, line integrals, and more.
This Flash Forum developer's article includes source code and instructions for building an applet that allows the user to enter expressions with up to four parameters and then to vary the parameters in order to fit the curve to user data.
This collection of resources is designed to supplement a modern algebra course. They are designed to help students visualize many of the important concepts from a first semester undergraduate abstract algebra course.