In my class, I use these MATHO cards in two ways. One way I use them is to put a list of answers up on the board and have the students choose twenty five answers to fill in on the board. We then do problems. They mark off the answer on their cards when they get that answer. Another way I use these MATHO cards is to have each student write his or her name two times. I then have them write the name of everyone in the class in a box. If there are extra boxes (according to class size) I have them put down the students of their choice in the open box. As we do problems in class, I call on students. If that student gets the problem correct, each person can mark their name out once on the MATHO card. Five in a row gets a prize. This is a great review game.