character: Inca Civilization
topic: Engineering Marvels of Machu Picchu
grade: 6
subject: Social Studies
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character: Inca Roads
topic: Infrastructure of the Inca Empire
grade: 6
subject: Social Studies
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character: Terrace Farming
topic: Agricultural Innovations of the Incas
grade: 6
subject: Social Studies
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character: Sacsayhuamán
topic: Stonework Techniques of the Incas
grade: 6
subject: Social Studies
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