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Afterimage
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In this optics activity, learners investigate afterimages.
Achi: A Strange Game of Tic Tac Toe
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In this game, learners strategize to be the first player to make three in a row.
Pocket Protractor
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In this activity, learners create angle-measuring devices--protractors--out of paper. Learners follow a series of steps to fold a square sheet of paper into a triangular Pocket Protractor.