character: Inca Builders
topic: Construction Techniques of the Inca
grade: 3
subject: History
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character: Machu Picchu
topic: Inca Architecture
grade: 3
subject: History
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character: Quechua People
topic: Traditional Building Methods
grade: 3
subject: History
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character: Inca Society
topic: Engineering Innovations
grade: 3
subject: History
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