SUGG: Calculatorgreenspun.com : LUSENET : Junkyard Wars : One Thread
Picture Cathy saying: "This week the teams are going to write a math test. The challenge is that the only calculators they can use will be the ones they build themselves. Each team is going to build a mechanical calculating machine, then we'll put them both to the test!"
Babbage stuff, lots of chance to use and illustrate logic gates and elementary 'programming'
-- Linda Carson (firstname.lastname@example.org), January 14, 2001