In order to raise the effective use of 45 minutes, allowing students to acquire knowledge positively and actively, and to make full use of students' internal factor in learning, we have made some reform in classroom teaching in recent years. 为了提高45分钟的效益,让学生积极主动地去获得知识,充分发挥学生的内在因素,几年来,我们进行了一些课堂教学的改革.