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众所周知,无论是在各省市还是全国卷的高考数学试卷中,立体几何知识作为必考内容在试卷中都占据着很大的分数比例。然而,由于立体几何知识的自身的抽象性很强,需要学生们对图形具有很强的洞察能力、逻辑推理能力、空间想象能力和知识综合运用的能力。如此高的要求使得高中生们刚接触该模块的内容时十分吃力。“分数高,难度大,得分率低下”成为了立体几何的标签。为了优化立体几何课堂教学的效率,许多一线的高中数学教师吃尽苦头。因此,为了能够帮助数学教师们更快的找到立体几何知识教学的新思路,在接下来的文章笔者将就当前立体几何教学中的现状分析后,从本人实际的教学经验出发,阐述一些笔者在教学中探究出的有效的教学优化方法,包含多媒体技术的引用,情景化的空间想象能力的培养等等,希望能够给正面临立体几何教学困境的教师们带来一些启发。
As we all know, whether it is in the provincial or municipal volumes of mathematics entrance examination papers, three-dimensional geometric knowledge as a necessary content in the papers occupy a large fraction of the scale. However, due to its high degree of abstractness, it is necessary for students to have a strong ability of insight, logical reasoning, spatial imagination and comprehensive utilization of knowledge in graphics. Such high demands make it very difficult for high school students to get in touch with the content of the module. “High scores, difficult, low scoring ” has become a three-dimensional geometric label. In order to optimize the efficiency of three-dimensional geometry classroom teaching, many front-line high school mathematics teachers suffered hard. Therefore, in order to help mathematics teachers find new ideas of teaching of solid geometry faster, in the following article, the author will analyze the current status of solid geometry teaching, starting from his actual teaching experience, The effective teaching optimization methods explored in teaching, including the reference of multimedia technology and the cultivation of the spatial imagination of the scene, hope to bring inspiration to the teachers who are faced with the dilemma of stereoscopic geometry teaching.