中国是个非常讲究对称美的国度。小到窗户上的剪纸,大到城市的布局,都在展示着对称之美。对称,对于学生来说,不是一个陌生的概念,小学阶段开始接触,初中继续学习。《义务教育数学课程标准》(2011年版)(以下简称《课标》)分学段渐进地提出了轴对称的学习要求,在第一学段(1—3年级)结合生活实例,感受轴对称现象,认识轴对称图形;第 China is a country that pays close attention to symmetry and beauty. Small to the window of the paper-cut, big city layout, are showing the symmetry of the United States. Symmetry, for students, is not a strange concept, primary stage began to contact, junior high school to continue learning. The compulsory education mathematics curriculum standards (2011 edition) (hereinafter referred to as “curriculum standard”) gradually put forward the axisymmetric learning requirements, in the first semester (1-3 years) combined with living examples, feel the axis of symmetry Phenomenon, understanding axisymmetric graphics;