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Reusable super heavyweight pocket lasts a long timeHelps by eliminating the need to copy worksheets over and over againClean easily with soft dry cloth or tissueConvenient eyelet for hanging
SKU: ERSSC-716847
UPC: 727638600050
UPC: 194629050673
Simple Machines Gear Train TEACHER AIDS Reusable super heavyweight pocket lastsMPN: 005646 UPC: 895452001442 This device illustrates the workings of a system of gears. When you turn one gear, the meshed teeth cause the other gears to rotate as well. The second gear turns in the opposite direction as the first, and the third gear turns in the same direction as the first. By meshing together a series of gears, you can transmit force from one place to another, as well as change in the direction of applied motion. This classic
