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These are handouts for both instructors and students for carrying out a change of variables.

A variety of information about minimal surfaces, including: research (papers and links to related sites); essays; a large library of graphics of minimal surfaces; software, images and movies.
A free OS X application for exploring parametrized surfaces.It features draggable tangent lines and tangent planes; geodesics at any point, in any direction; solid or wireframe rendering; draggabl

Activity designed to teach: Understanding different ways of expressing area using integration. Concrete example of Area Corollary to Green's/Stokes' Theorem.

Allows users to display both contour plots and surface plots of functions \(z=f(x,y)\).
Computes line integral along user-defined path in any of seven pre-defined vector fields.
This page introduces students to the notion of particle motion and tangent (or velocity) vectors using text and accompanying animations.
This web page tells the history of the invention of the ENIAC computer. It was invented to calculate ballistic trajectories during World War II. The web site also includes an ENIAC simulator.
Purchase your own non-orientable surfaces in a variety of glass-blown or hand-woven forms. Website is source material for in-class mathematical comedy.