“学然后知不足,教然后知困”,这句话千真万确。我从参加教学工作到现在,论教龄,已有二十多年了。过去在备课时,如果碰到新教材,不消说,是要花一番大力气去备课的;如果遇到的是已教过一遍,甚至多遍的教材,则认为是“轻车熟路”,往往就掉以轻心了。例如,怎样回答学生的提问?是每一个老师在备课时不能不“备”的问题。对此,教师中一般有两 “Learn and then lack of knowledge, teach and then trapped,” this sentence is true. I have been teaching teaching for about twenty years now. In the past when preparing lessons, if you encounter new textbooks, needless to say, it is necessary to spend a lot of energy to prepare lessons; if you encounter has been taught again or even over the textbook, it is considered “familiar”, often Take it easy. For example, how to answer a student’s question? Is it something that every teacher can not “prepare” for lesson preparation? In this regard, there are generally two teachers