character: Emperor Qin Shi Huang
topic: The Great Wall of China: A Protective Barrier
grade: 4
subject: Social Studies
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character: Mongol Invaders
topic: The Threats That Led to the Wall's Construction
grade: 4
subject: Social Studies
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character: Chinese Laborers
topic: The Builders of the Great Wall: Stories of Hard Work
grade: 4
subject: Social Studies
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character: Chinese Dynasties
topic: The Different Dynasties and Their Role in Expanding the Wall
grade: 4
subject: Social Studies
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