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A Web page with photographs and text to illustrate the mathematical differences in architecture between Spain and Italy
In this applet, a user fills in a grid to create a distribution of numbers. The applet displays the size of the standard deviation and the position of the mean in the distribution. An activity is provided to facilitate the use of the applet to investigate standard deviation.

In this article we present a collaborative environment of open source tools around the dynamic mathematics software GeoGebra that gives educators the freedom to create new and modify existing materials in an online community.

A Biological ESTEEM module in the Genetics Category. This workbook simulates a linkage analysis problem with up to four alleles.
A Biological ESTEEM module in the Genetics Category. This workbook performs six-frame translation on a short user-input nucleotide sequence and highlights the position of stop codons.
A mathlet for discovery of the integral and differential power rules prior to formal discussion of integral, power rule, or Fundamental Theorem in a calculus course.

This article presents a fresh look at an age-old calculus optimization problem, the 'box problem.' (Also includes a Student Module condensed from the article.)

This applet performs traditional elementary row operations keeping track of the entire process. It also allows fraction, integer, or decimal entries and preserves these types throughout the row reduction process.
A Biological ESTEEM module in the Epidemiology Category. This worksheet implements an SIR (Susceptible/ Infected/ Resistant) model of epidemiology for vector-borne diseases.
A module examining a model for the performance of world-class sprinters.