《论语·为政》里说得好:“是故学然后知不足,教然后知困。知不足,然后能自反也;知困,然后能自强也。故曰:教学相长也。”学生进入中年级后,我的课堂教学常常陷入“自言自语”的尴尬境地。在一次偶然的机会,我从一本书中读到叶圣陶先生的一段话:“学习语文要预习。反对不教学生预习,一切预习事项由教师代劳的做法。”我茅塞顿开,恍然大悟:是课前预习这一环节出现了疏漏, “The Analects of Confucius for the government” put it well: “So learn and then lack of knowledge, teach and then trapped. Know enough, and then reflexively; know sleepy, and then able to self-reliance. After students enter middle school, my classroom teaching often falls into the embarrassing situation of ”talking to myself “. On a chance occasion, I read from a book, Mr. Ye Shengtao’s words: ”No need to teach students to preview, all the preparatory work done by teachers. " I came forward, suddenly realized: yes A preview of this part of the omission,