On the floor, we would have a minus sign. All the desks will be put on the left side of the minus sign. The teacher would start by giving the math problem with the subtraction problem. Example; 20 students on the left minus 0 on the right. 20-0= 20 on the left. As the students share something with another student, then they can move from the left to the right. The teacher would then write the new problem. Example: 19-1= 18 on the left.

The students on the left would receive a math hat. When they move to the right they will trade in their math hat for a new Einstein wig or hat.

The teacher can adapt this problem to using an addition sign instead of a subtraction sign.