character: John A. Roebling
topic: Use of steel in architecture and construction
grade: 8
subject: Social Studies
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character: Brunelleschi
topic: Innovations in construction techniques
grade: 8
subject: Social Studies
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character: Joseph Paxton
topic: The Crystal Palace and its engineering marvels
grade: 8
subject: Social Studies
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character: Eiffel
topic: The Eiffel Tower and its iron frame structure
grade: 8
subject: Social Studies
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