Practice measurement conversions for length within the metric or U.S. standard systems with this memory matching card game. Perfect activity for a math center or partner work!This download is one pdf file that includes:★Game directions poster★20 metric length equivalent cards (using millimeters, centimeters, meters, and kilometers)★20 U.S. standard equivalent cards (using inches, feet, yards, and miles)★Card back design★Answer key for student or teacher use★My unique Collaborative License, which