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    National Park Service
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    In this online interactive, learners investigate changes in the environment at various locations across the United States. Investigations of an Alaskan coastal community, the Pika, coral reef...

    free Ages 4 - 14 5 to 10 minutes
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    National Park Service
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    In this online interactive, learners explore how archaeologists analyze artifacts to better understand how people lived long ago. Learners learn about the importance of asking good questions and...

    free Ages 6 - 14 5 to 10 minutes
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    National Park Service
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    In this online interactive, learners explore the various types of life that live in fresh water systems and how the presence of these organisms is an indication of the overall health of the water....

    free Ages 8 - 14 10 to 30 minutes
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    In this online interactive, learners measure time using the growth rings of trees. This resource explains the meaning of growth and rest bands, the causes of variations in "tree calendars,...

    free Ages 6 - 14 5 to 10 minutes
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    National Park Service
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    This detailed lesson plan for a field trip to Canyonlands National Park in Utah (page 32 of pdf) teaches students about the habitat of bighorn sheep. The trip, which includes a strenuous hike,...

    Over $20 per group Ages 11 - 14 1 to 7 days
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    National Park Service
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    In this online interactive, learners investigate "The Case of the Disappearing Dark Sky." Learners discover how human development leads to fewer visible stars as well as the effects of...

    free Ages 6 - 14 5 to 10 minutes
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    National Park Service
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    In this online interactive, learners investigate fires, particularly the causes and behavior of forest fires, as well as how the National Park Service deals with fires. Learners modify conditions ...

    free Ages 6 - 14 5 to 10 minutes
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    In this online interactive, learners match different dinosaurs to their food (plants or animals). Learners look for clues in the bodies, necks, teeth, and heads of the dinosaurs to make inferences...

    free Ages 4 - 14 5 to 10 minutes
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    In this online interactive, learners first explore the great American inventors and their inventions as well as the role of the National Park Service. Then, learners investigate how Edison's...

    free Ages 4 - 14 5 to 10 minutes

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