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In this activity, learners investigate the properties of different types of balls.

free Ages 8 - 11 1 to 2 hours
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In this graphing activity (on pages 33-40), learners investigate how much and what kinds of food sea otter pups eat during their first year of life.

1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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In this life science activity (page 8 of the PDF), learners explore the carbon cycle by mixing yeast, sugar and water.

Over $20 per group Ages 8 - 14 1 to 2 hours
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The major goal of this math lesson is to have learners collect data from a variety of experiments, determine what models best fits their data, and explain why their models are best.

Over $20 per group Ages 14 - 18 1 to 2 hours
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In this multi-faceted game (on pages 25-35), learners recreate what happens to creatures in the Brazilian rain forest as they grow from egg to adult—especially those that use fallen, empty Brazil nut

1 cent - $1 per group Ages 8 - 14 1 to 2 hours
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In this outdoor activity, learners plan a simple foot path and create an environmental impact study of the natural area where the path would be.

$10 - $20 per group Ages 8 - 18 1 to 2 hours