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在教学中,经常能听到有学生抱怨数学知识难理解,学起来比较困难。究其原因,主要是学生对数学概念、公式、定理等没有真正理解,导致认识模糊,理解不透。因此,要改变现状,教师就要改变传统的“一定义,二要点,三注意”教学方式,以课程改革精神为指导,重视情境教学。通过创设教学情境,让学生在直观感受中理解,在观察中发现,在动手操作中交流和讨论,从而弄清知识的来龙去脉,提高学生发现问题、分析问题和解决问题的能力。下面笔者以“直线与平面垂直的判定”教学为例,谈一谈情境创设点的选择及应注意的问题。
In teaching, you can often hear some students complain that maths are hard to understand and difficult to learn. The reason is mainly because students have no real understanding of mathematical concepts, formulas, theorems, etc., resulting in vague understanding and indecipherable understanding. Therefore, in order to change the status quo, teachers should change their traditional teaching methods of “a certain point, two points and three points of attention”, take the spirit of curriculum reform as guidance, and attach importance to situational teaching. Through the creation of teaching situations, students can understand intuitively. In observation, they find that they are exchanging and discussing in hands-on operation so as to clarify the ins and outs of knowledge and improve the ability of students to discover, analyze and solve problems. The following author to “line and plane vertical judgment ” teaching, for example, to talk about the situation creation point selection and should pay attention to the problem.