This manipulative provides opportunities to:
Explore ratios with movable hands and either a blank or lined background
Use two hand heights and describe the ratio relationship between them
Create challenges for keeping a consistent ratio relationship between the two hands
PhET also provides translated versions of the simulation in multiple languages, teacher created activities, and with a free account you can access their teaching resources.
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Simulation by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC-BY-4.0 (https://phet.colorado.edu)
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