October 10 is Metric Day! This set of metric olympics cards are a great way to reinforce metric measurement skills and have fun. Students are asked to estimate, measure, record, and subtract while they have fun with this measurement olympics. These activities are ready to be printed onto 4 x 6 notecards for easy center set-up. This lesson also includes a recording card for students to record their estimates and measurements, as well as the difference between the two!