This download includes two pages of cards that have different units (both customary and metric) that are used for measuring length. This download can be used in small groups or in partners as an independent task. The task card explains the rules of the game - similar to the card game "war" students draw cards and whoever puts down the larger unit gets to keep all of the cards. Whoever has all of the cards at the very end is the winner.
This game is fun and reinforces how to compare the size of units to the students.