character: Sally the Scientist
topic: Materials Used in Building Then and Now
grade: 3
subject: History
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character: Sally the Scientist
topic: Ancient Building Techniques
grade: 3
subject: History
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character: Sally the Scientist
topic: Modern Construction Materials
grade: 3
subject: History
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character: Sally the Scientist
topic: The Evolution of Homes Through History
grade: 3
subject: History
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