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教学内容:青岛版小学数学三年级下册第22页第5题及相关练习。教学目标:1.借助数学故事,能初步认识镜面对称的现象。2.通过观察、操作、合作、讨论等活动,体验活动中的镜面对称现象,初步感知镜面对称的性质;3.激发学生对镜面对称现象进行探究的好奇心,激励学生利用生活经验主动地探索数学知识。教学重点:通过照镜子实践活动,知道镜面对称的特点。教学难点:理解镜面对称在镜面成像时所发生的
Teaching content: Qingdao primary school mathematics third grade second volume page 22 fifth questions and related exercises. Teaching objectives: 1. With the help of mathematical stories, we can initially understand the phenomenon of mirror symmetry. 2. Through the observation, operation, cooperation, discussion and other activities to experience the activities of the mirror symmetry, the initial perception of the nature of mirror symmetry; 3. To stimulate students to mirror the phenomenon of curiosity to explore, encourage students to use life experience to explore Mathematical knowledge. Teaching Focus: By looking in the mirror practice activities, to know the characteristics of mirror symmetry. Difficulties in teaching: Understand what happens when the mirror is mirror-imaged