character: Maya Agriculture
topic: Overview of Farming Techniques in the Maya Civilization
grade: 4
subject: Social Studies
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character: Milpa System
topic: The Three Sisters: Corn, Beans, and Squash
grade: 4
subject: Social Studies
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character: Terracing
topic: Building Terraces for Efficient Land Use in Hilly Areas
grade: 4
subject: Social Studies
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character: Natural Irrigation
topic: Using Swamps and Canals for Water Management
grade: 4
subject: Social Studies
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