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“五一”长假前,“分数的意义”一节课告一段落,学生们都知道:“一个物体”、“一个计量单位”、“一个整体”都可以用单位“1”来表示。其中“一个物体”和“一个整体”看作单位“1”学生都有了较深的理解,而对“一个计量单位”的理解只浮于表面,知之甚少。于是,长假以后的第一节数学课上,我“后补”了这样一个细节。首先,我在黑板上端端正正地写上“单位1”三个字,然后让同学们说说哪些数量可以用单位“1”
Before the May Day holiday, the lesson of “the meaning of the scores” comes to an end. Students all know that “one object”, “one unit of measure” and “one whole” can be represented by the unit of “1”. The “one object” and “one wholeness” as a unit “1” students have a deeper understanding, but the understanding of “a unit of measurement” only on the surface, little understood. So, the first math after math class, I “post” such a detail. First of all, I wrote “Unit 1” on the blackboard and then let the students talk about the number of units that can be “1”