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正方体的侧面展开图是中考常考的知识点,首先这一内容所体现的操作性和实践性非常强,其次对学生的空间观念、想象能力也有一定的挑战性,是一个难点。那么它的展开图到底有没有一些规律可循呢?为了更好地突破这个难点,教学过程中,我是这样设计的:四人一小组,把前一天回家准备的正方体剪开,注意在每一小组内不准出现相同的展开图,然后把你剪出来的展开图尽可能多地画到黑板上,不要出现重复的,学生积极地完成了这项操作,
The side view of the cube is the knowledge point of the exam in the exam. Firstly, the operability and practicality embodied in this content are very strong. Secondly, it is a difficult point for the students to have the space concept and the imagination ability. In order to better break through this difficult teaching process, I was so designed: a small group of four, the cube prepared the day before the home cut, pay attention to the Each group is not allowed to appear the same expanded view, and then cut your cut out as much as possible to draw on the blackboard, do not appear repeated, the students actively completed this operation,