Call for the ball. A simple game. Just volleyball or football or basketball. All the students form a circle and count off in turn. Remember your numbers. A classmate threw the ball vertically into the air and shouted a number at the same time. The shouted students came out to catch the ball at once. If he catches it, keep calling other numbers. If he misses the ball, he must pick it up. In the meantime, other students can run at will and don't let the students who pick up the ball hit themselves. When picking up the ball, students choose a target and hit each other with the ball (as long as the ball touches each other). If you don't touch it, the students who pick up the ball do push-ups or something. The students who were hit by the students who picked up the ball did push-ups.