character: Inca Civilization
topic: Engineering Marvels of Machu Picchu
grade: 6
subject: Social Studies
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character: Hiram Bingham
topic: Discovery and Studies of Machu Picchu
grade: 6
subject: Social Studies
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character: Inca Farmers
topic: Agricultural Techniques in Terracing
grade: 6
subject: Social Studies
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character: Inca Architects
topic: Structural Innovations in Terracing Systems
grade: 6
subject: Social Studies
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