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This applet supplements the authors' "Gutter Problem" material, but can be used to generally study properties and forms of quadratic functions, both analytically and graphically.

On Fermat's Pond

A mathlet for exploring reflected and refracted images

The maths online Collection

This article gives a brief account of the learning material to be found at the maths online website.

Generalized Baseball Curves: Three Symmetries and You're In!

The curve traced out on a baseball by its seam has many symmetries. This article explores the class of closed spherical curves with the same symmetries, which we call generalized baseball curves.

Parametric Surfaces in Cylindrical Coordinates

This utility uses the free Flash player plug-in resident in most browsers to allow the user to plot parametrically defined surfaces in cylindrical coordinates. Many examples and directed exercises are included.

The Linear Algebra Behind Search Engines

An extended module for students to explore the linear algebra concepts, especially the singular value decomposition, behind modern search engines

Let's Do It!

A Developer's Area column on Java for those coming from a teaching background who seek programming advice and those with a software development background who seek to develop an item of value to the teaching and learning communities.

How to Submit an Article to Loci

A brief outline of policies for submission of articles to Loci.

Two-Species Model

A Biological ESTEEM module in the Ecology Category. This worksheet simulates the population growth of two interacting species.

Writing Mathlets II: A Call to Math Professionals

This is the second in a series of Developers' Area articles on writing Java applets.