MEDIAN Don Steward mathematics teaching: what's gone wrong?

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this problem posed by

jack frohlichstein (publ. dover, 1962)

mathematical fun, games and puzzles puzzle 153

free pdf version of book here

a ppt is here

oh, shouldn't they be the same answer?

don steward: my interest is in effective tasks for teaching mathematics to 10 to 18 year students ~ I have collected and trialled many people's ideas for tasks for many years and have played at making these work ~ my thanks to these people

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