Ask the children to write a fact family with one fact on each of four file cards. Have them also write their initials on the front of each card. Next collect cards from 5 students to play a round of “Concentration.” To play, shuffle the cards and place them upside down in an array. Then call a child to turn over two cards. If the cards belong to the same fact family, the child keeps the cards. If they do not match, the cards are returned to the array and another child takes a turn. Continue playing until all children have had a chance.
Next put the children into small groups and have them play “Concentration” with their cards. As groups complete the activity, ask the students to list the subtraction facts they know and those they have yet to memorize. Have them make flash cards for some of the facts they still need to memorize.
