This utility uses the free Flash player plug-in resident in most browsers to allow the user to graph a surface of the form z = f(x,y) on a customized scale and dynamically rotate the three-dimensional picture.

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A Biological ESTEEM module in the Genetics Category. This worksheet simulates the population genetics of a single gene with two alleles.

This article explores the geometric interpretation of fractional integration with the aid of several animated images.

A **Developers' Area** article about developing reusable components in Java.

This suite of five interactive applets (written with GeoGebra) allows exploration of definitions and theorems commonly presented in first-year analysis courses. Topics include sequence convergence, continuity at a point, the Mean Value theorem, Taylor series, and Riemann sums. Included with each applet is a pair of activities: one for becoming comfortable using the applet, and one for using the applet to explore the associated topic in depth.

A Biological ESTEEM module in the Sequence Alignment Category. These two worksheets implement a dynamic programming algorithm for simultaneous alignment of multiple sequences.

This Java applet allows the user to experiment with Riemann sums. It can also be used to approximate definite integrals or find upper and lower bounds to the exact value of a definite integral, using Riemann sums.

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