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A wonderful survey of the history of mathematics, emphasizing its relationship with the ambient culture.
In this article which won the 2005 prize of HOMSIGMAA, the author discusses Eratosthenes' argument to determine the size of the earth as well as possibilities for the size which Eratosthenes found (in modern measures).

Curve sketching, tangent lines, and optimization, explored via interactive applets

A compilation of ethnomathematical ideas from around the world.

The authors provide an analysis and English translation of the argument by a little known French mathematician that calculus should be based on series rather than on infinitesimals.

A description of this well-regarded website.
Two wine merchants enter Paris, one of them with 64 casks of wine, the other with 20.
A man went to a draper and bought a length of cloth 35 braccia long to make a suit of clothes.
The steamer, Katie, leaves the wharf at New Orleans and runs an average speed of 15 mph. When Katie had gone 25 miles, the steamer R.E. Lee leaves the wharf and runs the average speed of 18 mph. How far will the Lee go before she overtakes the Katie?
The cost per hour of running a certain steamboat is proportional to the cube of its velocity in still water. At what speed should it be run to make a trip up stream against a four-mile current most economically?

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