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3) Pulleys
Author
Description
"Relevant images match informative text in this introduction to pulleys. Intended for students in kindergarten through third grade"--
4) Wedges
Author
Description
"Relevant images match informative text in this introduction to wedges. Intended for students in kindergarten through third grade"--
5) Screws
Author
Description
"Relevant images match informative text in this introduction to screws. Intended for students in kindergarten through third grade"--
7) Levers
Author
Description
"Relevant images match informative text in this introduction to levers. Intended for students in kindergarten through third grade"--
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