If the number belongs to the set described by the rule, it is written above the line. If not, it is written below the line beneath the last number that belongs. Some players will identify the rule after a few clues. Have each student record on a note card a rule for a new games and use these rules as review during the next few weeks. Have students make a list of the number properties they learned about during the game.
Students can create a new rule and play the game with a partner.
Students can try to stump their classmates by researching a new idea, such as the Fibonacci sequence, and leading a game based on the related rule.