如何在课堂40分钟内实现有效教学.笔者认为,其第一步就是要设法吸引学生的注意力,让学生对所学内容感兴趣.正所谓兴趣是最好的教师,只有调动学生的兴趣、激发学生的求知欲,才能达到事半功倍的教学效果.例如,华东师大版《数学》九年级(下)的“反证法”.反证法是一种重要的证明方法,经常能在证明数 How to achieve effective teaching in the classroom within 40 minutes. The author believes that the first step is to try to attract the attention of students, so that students are interested in what they have learned. The so-called interest is the best teacher, only to mobilize the interest of students, Inspire students’ curiosity, in order to achieve a multiplier effect of teaching. For example, in the “Mathematics” grade of the East China Normal University, the “anti-evidence method” of the ninth grade (below) is an important method of proof and can often prove the number of