character: Engineer Ella
topic: Designing Bridges with Safe Materials
grade: 4
subject: Reading
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character: Structural Sam
topic: Understanding Load-Bearing Structures
grade: 4
subject: Reading
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character: Safety Sally
topic: Choosing Safe Building Materials
grade: 4
subject: Reading
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character: Creative Chris
topic: Innovative Designs for Strong Bridges
grade: 4
subject: Reading
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