Use playing cards. Take the Jack, Queen, King and Ace out. Student turns over two cards. On the recording sheet, the student writes down the lesser number in that column and the greater number in the other column. Then the student turns over another card. If the number on the card can "sandwich" between the other numbers, the student writes "yes" under the "Can it Sandwich?" column. If the number on the card cannot "sandwich" between the other numbers, the student writes "no".