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A mathlet to explore approximation of the definite integral by Riemann sums
The Flash Forum resource shows velocity and acceleration vectors for an arbitrary parametric curve in space, and provides built in examples. Flash source code is provided.
Graph functions, zoom on points, and find points of intersection of multiple graphs.

An article on the use of technology to stimulate mathematical thinking even by the least likely students

This mathlet simulates a predator-prey system of foxes and rabbits over time.
A Bioquest ESTEEM module in the Genetics Category. The purpose of this workbook is to compare several methods for calculating allele frequencies for ABO blood groups.
This is an article describing the author's experiences using the Duke Connected Curriculum materials
Simple probability concepts such as sampling with or without replacement are illustrated in this engaging tiered activity for beginning students and future teachers of probability.
A Biological ESTEEM module in the Phylogenetics Category. This worksheet performs split decomposition on a set of four DNA sequences and their associated amino acid sequences.