论文部分内容阅读
〔教学内容〕人教版义务教育课程标准实验教科书《数学》二年级上册第5单元“观察物体”中第69页的例题3和练习。〔教学重点〕通过照镜子的实践活动,建立镜面对称现象的表象。〔教学难点〕理解镜面对称在镜面成像时所发生的变化。〔教具准备〕大镜子、小镜子每人一面;反写的数
[Teaching content] PEP Edition compulsory education curriculum standard experimental textbook “Mathematics” Grade 2 Volume 5 of the “observation object” in the sample page 69 and practice. [Teaching Focus] Through the practice of looking in the mirror, the phenomenon of mirror symmetry is established. Difficulties in Teaching Understand the changes that mirror symmetry occurs in specular imaging. 〔Teaching aids to prepare〕 large mirror, a small mirror side of each; anti write number