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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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    WGBH
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    In this interactive board game, learners "hire" different types of scientists to help canine character Ruff Ruffman solve unusual problems. Through Ruff's adventures, learners meet...

    1 cent - $1 per student Ages 6 - 11 45 to 60 minutes

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