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“图形的对称”是苏教版小学数学四年级下学期的一个教学内容。本课旨在在学生已初步认识轴对称图形和对称轴的基础上,对“对称轴”这部分知识进行进一步的探究和学习。如何通过这节课的学习使学生在头脑中形成清晰的、有条理的知识结构,进而加深对轴对称图形特征的认识,发展学生的空间观念呢?笔者通过重组教材并借助于信息技术进行了大胆的尝试,取得了很好的教学效果。
“Graphic Symmetry ” is a teaching content of the fourth grade of the Sujiao version of elementary school next semester. The purpose of this course is to further explore and learn the part of the knowledge about the axis of symmetry based on the preliminary knowledge of the axisymmetric figure and the symmetry axis. How to make the students form a clear and organized knowledge structure in their minds through the study of this lesson so as to deepen their understanding of the characteristics of axisymmetric graphics and develop the students’ concept of space? By reorganizing teaching materials and using information technology Bold attempt to achieve good teaching results.