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grade:
3
subject:
Social Studies
topic:
Development of the Phonograph
character:
Thomas Edison
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grade:
3
subject:
Social Studies
topic:
Inventions and Innovations
character:
Thomas Edison
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grade:
3
subject:
Social Studies
topic:
Inventors in Communication
character:
Alexander Graham Bell
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grade:
3
subject:
Social Studies
topic:
Contributions to Electrical Engineering
character:
Nikola Tesla
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