案例:仰卧起坐练习前,教师采用倒计时督促学生迅速自由结合并站在练习垫子的旁边,对于不能及时站到垫子旁边及没找到同伴的学生要求其进行下蹲练习,多数学生的行动迅速了许多,有位男生却总是挨罚,他甚至说:“罚就罚呗,反正我不想做仰卧起坐。”分析:教师采用倒计时的方式督促学生迅速到位,有一定的效果,让学生用下蹲动作代替仰卧起坐,也有一定的效用, Case: Before the sit-in exercise, teachers used countdown to urge the students to quickly and freely combine and stand beside the practice mat. For students who could not stand beside the mat in time and did not find their companions, they were required to squat and practice. Most students acted swiftly Many, a boy is always punished, he even said: “Penalty penalty chant, anyway, I do not want to do sit-ups.” Analysis: Teachers countdown to urge students promptly in place, have a certain effect, so that Students use squatting instead of sit-ups, but also a certain degree of utility,