Students are assigned numbers randomly. The students say their numbers in front of the class and the other students try to remember everyone s numer. The students must try to keep their number a secret. The students are then divided into two teams. A student from Team 1 calls out a number. If the number belongs to someone on Team 2, then that person must move to Team 1. If the student from Team 1 calls out a number that belongs to someone on her on team, then that someone must move to Team 2. The teams try to have the most players by the end of the game. The end comes either when the teacher declares the game finished or when one team has all the players (or a set number of players).