高中学生感到立几难学,是因为不仅要逻辑推理,还要空间想象。。要突破立体几何这些难点,抓好启蒙教学是很重要的一环。下面谈谈我在进行立几启蒙教学的一些作法与体会,以供交流,以求指教。一、关于识图、画图教学几何是研究图形的科学,空间图形是立体几何的特殊语言,善于识别、绘制空间图形,自然是学好立几的关键一环,而这正是学生进入立几大门时所遇到的第一道难关。一方面,由于构成立体图形的基本元素,除“点、线”外,较平面图形多了“平面”。如何表示空间的点立线与平面,平面与平面之间的相互关系,对于有些初 High school students feel that it is difficult to learn because it requires not only logical reasoning but also space imagination. . To overcome these difficulties in three-dimensional geometry, grasping the enlightenment teaching is an important part. Let’s talk about some of the practices and experiences I have been teaching in a few moments of initiation to facilitate exchanges for advice. First, on the map, drawing teaching geometry is the study of the science of graphics, spatial graphics is a special language of the three-dimensional geometry, good at identifying, drawing spatial graphics, is naturally a key to learning how to establish a few, and this is the student enters several doors The first difficulty encountered. On the one hand, due to the basic elements that make up the three-dimensional graphics, there are more “planes” than the planar graphics, except “points, lines.” How to represent the relationship between point and plane in space, plane and plane, for some