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This module develop the SIR Model for the spread of an infectious disease, including the concepts of contact number and herd immunity.
Three applets allow you to interact with the puzzle described in the April 2009 Mathematics Magazine article by Alex Fink and Richard Guy.
A Biological ESTEEM module from the Ecology Category. This Excel workbook uses the Leslie Matrix Model for population projection of age-class or stage-class structured populations.
A module to explore Consumer Price Index data by fitting an exponential curve to it in Excel
A mathlet that allows you to visualize a sequence (or series) of real functions.
Loci has a new Editor!
Guidelines for Loci reviewers -- including evaluation criteria and summary results.
This Flash Forum article includes source code and instructions for building a truth table applet and other applications requiring parsing and evaluation of logical expressions.
A suite of mathlets for interactive exploration of quadric surfaces
This mathlet computes Riemann sums for a user-defined function and draws a graph of the function as well as a graphical represenatation of the approximations.