Top It is a two player game. Essentially, it is the game of “war” that you played as a kid with playing cards! To play, you need at least two copies of single digit number cards. Players put all cards face down in a pile. They flip over the cards and the player with the greatest value, sum, or difference (depending on the rules) wins all the cards from that hand. (The kids can use a dry erase board if they need a space to show their work.) Players continue until all the cards in the deck have been collected. The player with the most cards wins the entire game! Then, students repeat and play again!