character: President Theodore Roosevelt
topic: National Parks and Conservation Policies
grade: 6
subject: History
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character: John Muir
topic: Advocacy for National Parks
grade: 6
subject: History
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character: Gifford Pinchot
topic: Forest Conservation Efforts
grade: 6
subject: History
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character: Stephen Mather
topic: First Director of the National Park Service
grade: 6
subject: History
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