很多教师在课堂上不敢讲、讲不清、说不透,在片面追求学生主动性的同时过于弱化了教师的作用.源于学生需要、去除不必要的顾虑,该讲的还要讲.找准起点,找出重点,找到难点,努力做到会讲. Many teachers are afraid to speak in the classroom, can not tell, can not say without words, in the one-sided pursuit of student initiative while weakening the role of teachers from the students need to remove unnecessary concerns, the talk should say. Identify the starting point, identify key points, find difficulties, and strive to be able to speak.