Area Slider (Multiplication)
thingiverse
This play-doh cutter can be used for teaching/learning both multiplication and division. This comes in two parts: 1. A 10cm x 10cm cutter with labels 1-10 on two axis. 2. A slicing arm that allows you to place it at any of the marked intervals. Students can use this to cut play-doh (or trace on paper) any rectangle from 1 to 10 cm on each side. This makes area multiplication models more quickly, thus allowing students to focus on the concept instead of counting 1s cubes with the Base 10 Blocks. https://www.youtube.com/watch?v=CloykWg19JQ
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