论文部分内容阅读
一、案例背景(一)《义务教育数学课程标准》对本学段轴对称的课程内容及要求主要有以下几个方面:(1)结合日常生活中的对称现象,让孩子们观察、思考、讨论、操作,从而达到对轴对称图形有了一个直观认识,能辨认轴对称图形。通过画一画、折一折等数学活动,让学生经历轴对称图形的形成过程,直观认识轴对称图形对折后“完全重合”的特征,直观认识对称轴。(2)让学生经历解决问题的过程,发展学生的空间观念,
First, the case background (a) “compulsory education mathematics curriculum standards” The axis of symmetry of the course content and requirements are mainly the following aspects: (1) combined with the symmetry of everyday life, let the children observe, think, discuss , Operation, so as to achieve an intuitive understanding of the axisymmetric graphics, axisymmetric graphics can be identified. By drawing a picture, folding and folding and other mathematical activities, students can experience the formation process of axisymmetric graphics and intuitively recognize the symmetry axis of the axisymmetric graphics after folding, completely overlapping. (2) let the students experience the process of solving problems, develop the concept of space students,