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    PBS
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    In this math lesson, learners make estimates to analyze the number of apples per acre, and visualize the magnitude of one million. Using the thematic setting of Johnny Appleseed, learners practice...

    Over $20 per group Ages 8 - 11 1 to 2 hours
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    Science Museum of Minnesota
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    What's a Pickle-Oh? Two pieces of pickle on a stick are connected to a Pico Cricket (micro controller). When you slide the pickles apart the note changes. You can also expand on the activity...

    Over $20 per student Ages 8 - 18 10 to 30 minutes
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    Lunar and Planetary Institute
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    In this activity, learners discover that the Moon, like Earth, is made up of layers of different materials. Learners work in teams to make models of the interiors of the Moon and Earth. Common food...

    Over $20 per group Ages 8 - 14 45 to 60 minutes
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    U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy
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    In this activity, learners will be introduced to biomass gasification and will generate their own biomass gases. Learners generate these gases everyday on their own and find it quite amusing, but...

    Over $20 per group Ages 14 - 18 2 to 4 hours