经过一年多来积极改进教学方法的探索,我组同志对“少而精”和“启发式”不同程度地加深了体会,现在试以于学敏同志的立体几何教学为例进行了初步总结。 (一) 灵活处理教材,贯彻“少而精”,狠抓主要矛盾在教学中能抓主要矛盾,不仅注意了从教材整体着眼,而更主要的是注意了从学生实际出发。他认为空间概念的树立,绘图、识图能力的培养,以及在已有的平面几何知识基础上,进一步发展学生的逻辑推理能力,都要在学习立体几何第一章时打好基础,所以就确定第一章作为全书的重点,并确定把第一章中“平行和垂直的关系”部分作为全章的教学重点。为使学生掌握好主要基本概念和基本技能,在处理教材上,他改变了过去平均使用力量的作法。例如讲“二面角的概念”时,就把过去详讲的二面角的平面角的存在性和唯一性改为略讲,删去过去所补充的二 After more than a year of active exploration of improving teaching methods, Comrades of our group have deepened their understanding of “less and refined” and “heuristic” to different degrees. Now we try to use Comrade Xue Min’s three-dimensional geometry teaching as an example. . (A) Flexible handling of teaching materials, implementation of “less and refined,” pay close attention to the main contradiction in the teaching can grasp the main contradiction, not only pay attention to the overall focus on the teaching material, but more importantly, pay attention to proceed from the students. He believes that the establishment of spatial concepts, the development of drawing and graphing abilities, and the further development of students’ logical reasoning ability based on the existing knowledge of plane geometry must lay a solid foundation in the first chapter of solid geometry learning. Determine the first chapter as the focus of the book, and make sure that the “parallel and perpendicular relationship” section in the first chapter is the teaching focus of the entire chapter. In order to make students master the main basic concepts and basic skills, he has changed the practice of using average power in the past in dealing with teaching materials. For example, when we talk about the concept of dihedral angles, we change the existence and uniqueness of the dihedral plane angles detailed in the past into something slightly different from the previous one.