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A welcome message from the Executive Director of MAA
A Biological ESTEEM module in the Genetics Category. This worksheet simulates the population genetics of a single gene with two alleles.
This site features three simple-to-use applets: contour diagrams, curve families, and surface of revolution. The applets are written in Java and exploit Sun Microsystems' Java OpenGL technology so they will run on Apple OS X, Microsoft Windows 2000 or above, Solaris and many common configurations of Linux.
This is an article describing the author's experiences using the Duke Connected Curriculum materials
A Biological ESTEEM module in the Sequence Alignment Category. These two worksheets implement a dynamic programming algorithm for pairwise sequence alignment.

Marden's Theorem concerns the relative positions of the roots of a cubic polynomial and those of its derivative. This article gives a proof of Marden's theorem, along with dynamic geometry animations and some of the history of the result.

This Supplement provides an applet which allows readers to explore symmetries of "Yin-Yang" shapes generated by polar graphs of Fermat spirals.

A Developers' Area article about reuse and interoperability of mathematical tools.
This applet allows the user to see regions of integration for double integrals in rectangular or polar coordinates. The applet uses classes from the article "Flash Tools for Developers: Parametric Curves on the Plane."
These applets provide interactive student activities to make connections between the graphical and analytical interpretation of "completing the square" and writing the equation of a parabola in general and standard form.