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A man is walking across a bridge, when a boat passes under the bridge.How rapidly are the boat and the pedestrian separating after the boat passes under the bridge?

Project Mathematics

Videotape of aspects of the history of mathematics.

Running Horse

A horse halving its speed every day runs 700 miles in 7 days.

The Prince of Mathematics: Carl Friedrich Gauss

A biography of Gauss designed for high school students.

Mathematical Treasure: Robert Tanner's A Mirror for Mathematiques

Images from a 16th-century text about the astrolabe and its uses

Historical Modules

A CD with eleven modules, each containing numerous activities designed to help secondary teachers use the history of mathematics to teach mathematics.

Napier's e

A discussion of why we use "e" to represent the base of the natural logarithm system.

Alien Encounters

A dramatization, in two Acts, of the struggles of European mathematicians of the seventeenth and eighteenth centuries to come to terms with the newly admitted negative numbers.

Leonardo da Vinci's Geometric Sketches

This is a collection of plates that Leonardo da Vinci created to illustrate De divina proportione of Luca Pacioli.

Traveling Men

Two men starting from the same point begin walking in different directions. Their rates of travel are in the ratio 7:3.