设计说明对称是一种基本的图形变换,包括轴对称(也叫反转对称)、平移对称、中心对称、旋转对称和镜面对称等多种形式。如何让学生充分体验对称图形“对折后,两边完全重合”这一本质特征及如何使这节课更具趣味性是我考虑最多的问题。为了更有效地突出重点、突破难点,增强数学学习的趣味性,我设计了观察想象、动手折一折、剪一剪、猜一猜、玩一玩、赏一赏等活动,让学生在充满趣味的活动中学习、在动手操作中感悟,充分体验并经历知识的 Design Description Symmetry is a basic transformation of the shape, including axisymmetric (also known as inversion symmetry), translational symmetry, center symmetry, rotational symmetry and mirror symmetry and other forms. How to enable students to fully experience the symmetrical graphics The essential feature of “after the folding, the two sides completely overlap ” and how to make this lesson more interesting is my most considered issue. In order to more effectively highlight the key points, break through the difficulties and enhance the fun of math learning, I designed the activities of observing and imagining, breaking the fold, scissoring, guessing, playing a play, enjoying a reward, Interesting activities in the learning, perception in the hands-on operation, to fully experience and experience the knowledge