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平几综合复习教学中,在充分发挥教师的主导作用方面,笔者认为关键在于备课。备课不仅是备教材、备学生,而且还要备习题。备习题不能仅停留在选择几个习题以配合复习内容,而且要在梳理平几基础知识的基础上,挖掘教材与习题、习题与习题间的内在联系。只有通过对典型例题,运用归类、演变、逆用、推广等方法、从纵横两个方面追溯引伸、演变,才能揭示习题间内在的本质的联系及规律,下面从现行初中几何第一册P_(153)上的一道复习题谈一点肤浅的看法。
In the course of comprehensive review of teaching in a few weeks, in terms of giving full play to the leading role of teachers, the author believes that the key lies in preparing lessons. Preparing lessons is not only preparing textbooks, preparing students, but also preparing exercises. The preparation questions can not only stay in the selection of several exercises to meet the review content, but also on the basis of combing the basic knowledge of a few basic, and tap the intrinsic link between the teaching materials and exercises, exercises and exercises. Only through typical examples, the use of classification, evolution, converse, promotion and other methods, from the vertical and horizontal aspects of the extension, evolution, can reveal the inherent nature of the connection between the exercises and the law, the following from the current junior middle school geometry in the first book P_ A review question on (153) talks about a superficial view.