Divide the class in half to review math problems. Each student stands by their desk (paper and pencil on desk). Call out a math problem such as 4+5=. One half of the class jumps 4 times, then the other half jumps 5 times. Each student writes down their own answer. Continue with other math problems, and vary the movements: clapping, touch toes, jumping jacks, side bends, high-knees. Have students pick the movements.