传统的教学方式常以教师的讲授为主。教师在讲解过程中,往往担心知识点讲解不够透彻,力求面面俱到,并且不停地拓展延伸。这样的讲解往往存在一个问题:学生不讲也会的讲了,学生通过自学也能会的讲了,学生讲也不会的也讲了。教师讲得过多、过细,挤占了学生的大量的宝贵时间,课堂教学的一部分成为了无效教学。要改变这种困境,就要适当改变教学模式,把课堂还给学生,充 The traditional method of teaching is often dominated by teachers. Teachers in the process of explaining, often worry about knowledge points to explain not thorough enough, and strive to cover everything, and continue to expand and extend. There is often a problem with this explanation: students do not speak about it, and students are able to speak through self-study. Students will not speak about it. Teachers speak too much, too small, squeeze a lot of valuable time students, part of the classroom teaching has become invalid teaching. To change this dilemma, we must properly change the teaching mode, the classroom back to students, filling