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This paper describes a working-model demonstration of Ernest Rutherford's 1911 experiment about the nature of atoms.

$10 - $20 per group Ages 11 - adult 45 to 60 minutes
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Working in small groups, learners receive a written scenario regarding a bacterium with a certain goal it must carry out.

1 cent - $1 per group Ages 14 - 18 30 to 45 minutes
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This simulation helps learners understand what happens to food as it passes through the digestive system.

$5 - $10 per group Ages 14 - 18 45 to 60 minutes