Preparation: On 3x5 inch index cards, write out 12 or 16 equations appropriate to the level of study. Each equation should be different, but pairs should have the same solution (eg. 4+8 / 15–3).
To Play: Place the cards face down in rows of four. Take turns turning up two cards at time and reading the equations aloud. If the solutions to the equations on the two cards are equal, the player keeps them and takes a second turn. If they do not match, the cards are replaced face down in the same position and the next player takes a turn. Don’t tell the players if they have a match. It is important that the players recognize matches themselves. Play until all the cards are matched. The player with the most pairs wins.