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Students solve five problems in each level of this interactive game, beginning by selecting from one to five toys and adding their prices. This determines the challenge level of the activity. In Level 1, students find the sale price when the original price and percent discount are known. In Level 2, they find the percent discount when the original price and the sale price are known.
Grade Level: 3, 4, 5, 6+
This Technology Problem of the Week (tPoW) challenges students to use proportional reasoning to determine the speed of a train that two children in a tunnel evade by running in opposite directions, given only the kids' relative starting position and speed as they run out of the tunnel. It links to the Geometer's Sketchpad sketch "Train Tunnel." Solve and explain your solution; download hints and answer checks. Free registration is required.
Problem Set, Interactive Media
Grade Level: 6+