为激发初中生学习数学的主动性,尊重与提高他们的课堂主体地位,根据教改实践经验认为,应采用以学定教的逆向教法,让学生积极地参与教学内容与教学方法的选择与确定,追求强化教学针对性与调动学生主动性的积极意义,实现教学与学习的高效. In order to motivate junior high school students to learn mathematics initiative, respect and improve their status as the main body of the classroom, according to the experience of teaching reform, we believe that we should use the reverse teaching method of learning and teaching to allow students to actively participate in the selection and determination of teaching content and teaching methods. , Pursue the positive significance of strengthening teaching pertinence and mobilizing students’ initiative to realize the efficiency of teaching and learning.