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    American Chemical Society
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    In this activity, learners investigate why apples turn brown. Learners discover that lemon juice interferes with the reaction that causes the browning.

    $1 - $5 per group Ages 4 - 11 2 to 4 hours
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    NCTM Illuminations
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    In this three-day (or three-part) math lesson, learners represent the number eight in writing and with a variety of manipulatives related to spiders. Learners construct sets of eight by cutting...

    $10 - $20 per group Ages 4 - 8 2 to 4 hours

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    • Oregon Museum of Science and Industry (remove)
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