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一、问题的提出《数学课程标准(2011年版)》指出:数学是研究数量关系和空间形式的科学。在数学课程中,教师应当注重发展学生的空间观念和几何直观。然而,对于初中的学生来说数学平面几何是深奥的、难以理解的。许多学生都怕学几何,以至于慢慢对数学学习失去了兴趣。我们很多老师对此很无奈,发出了“再怎么教,学生也不会”的感叹。笔者认为造成这样局面的很大一个原因在于课堂——课堂上教师是否关注几何教学的有效性。
First, the issue put forward “Mathematics Curriculum Standard (2011 Edition)” pointed out: Mathematics is the study of quantitative relations and spatial form of science. In mathematics courses, teachers should pay attention to developing students’ space concept and geometric intuition. However, mathematical geometry for junior high school students is esoteric and difficult to understand. Many students are so afraid of learning geometry that they slowly lose interest in math. Many of our teachers are helpless on this issue, issued a “no matter how to teach, students will not ” sigh. I think a great reason for such a situation is the classroom - classroom teachers are concerned about the effectiveness of geometry teaching.