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An article about an interactive environment for viewing dynamically the geometry of elementary row operations.

This mathlet computes the center of mass (centroid) of a lamina of uniform density.
Investigate properties of the mean and median of a distribution, and then test your knowledge.
A Biological ESTEEM module in the Genetics Category. This Excel workbook as two related applications, the Birthday Problem and Class Phenotypic Probabilities.
An article about using Excel to illustrate two concepts associated with attribute acceptance sampling plans: Calculating the probability of lot acceptance, and designing a plan that satisfies certain consumer's and producer's risks.
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.

This article describes an authoring tool that translates a simple, TeX-like input syntax into Content MathML. The MathML can then be copied and pasted into web pages.

A module to study turns at high speed, where frictional effects are not sufficient to maintain circular motion

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.