This is a game that involves     sequencing. It can be adapted to decimals, fractions, integers,     etc. Give each student a large card with a number on it. They     self-assemble in numerical order without talking. For more fun,     have kids play against a timer so they have to scramble quickly     into line. A fun variation is to play this with positive and     negative integers such that pairs of kids choose to be the     positive and negative side of 1, 2, 3, etc. Kids should catch on     quickly that they need to position themselves symmetrically     around the “0” card to build a number line of all the integers.
(This game was developed by Suzanne Lyons, founder CooperativeGames.com)