This is an activity to help support CCSS 2.MD.3 - Estimating lengths in centimeters, inches, feet, yards, meters, etc. In this activity, students find cards with pictures of monsters on them. They are then asked a question about how long/tall/wide that monser is in either centimeters or inches. They first estimate the measurement and record it on the recording sheet. Then they actually measure and record the actual measurement as well.
My students had a blast doing this in their small independent groups, and I hope yours will too!!