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

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

An **article** about the merits of using projects in Calculus that involve an element of design, with examples of such projects and reasons why they work.

We highlight five pages written in XHTML with links to SVG files that produce animations illustrating calculus concepts such as the sign of the derivative, inflection points, conic sections, area between two curves, and multivariable functions.

A Biological ESTEEM module in the Sequence Alignment Category. These two worksheets implement a dynamic programming algorithm for pairwise sequence alignment.

A series of **modules** that require the use of polynomial and trigonometric functions to model the paths of straight-stretch roller coasters

Users toss a virtual coin or die to investigate the law of averages. The outcomes of multiple experiments (consisting of 10000 tosses each) can be graphed on the same plot to facilitate visualization of trends. An activity is provided to facilitate thinking about the law of averages with the applet.

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."

A **mathlet** to construct an antiderivative by accumulating area under the graph of a function.