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    Howard Hughes Medical Institute
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    In this interactive activity, learners analyze seashells to explore phylogeny and evolution. Learners identify similar and dissimilar seashells to create a phylogenetic tree. The Teacher Guide...

    free Ages 11 - 18 10 to 30 minutes
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    Lawrence Hall of Science
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    In this online activity, learners examine U.S. pennies to find the date each penny was minted or manufactured. Learners enter their data and then are able to see data from other learners. A bar...

    1 cent - $1 per student Ages 6 - 11 10 to 30 minutes
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    University of Washington
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    In this activity (11th activity on the page), learners use pennies to test their hearing acuity. Learners collect pennies, drop them one at a time on a hard surface and listen to the sounds they...

    free Ages 6 - 18 10 to 30 minutes

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