教学设计▲指导思想与理论依据空间观念作为《数学课程标准(2011年版)》内容的核心概念,是“图形与几何”学习的核心目标之一。为了促进学生对空间的理解与把握、发展空间观念,《标准》安排了图形的平移、旋转、轴对称,运用坐标描述图形的位置和运动等内容。小学阶段《图形的运动》共安排了三次,第一学段安排了一次,侧重于整体感受现象,帮助学生直观认识平移、旋转和轴对称 Instructional Design ▲ Guiding Ideology and Theoretical Basis Spatial concept as one of the core concepts of the content of “Mathematics Curriculum Standard (2011 Edition)” is one of the core goals of “Graphics and Geometry”. In order to promote students’ understanding and grasp of space and develop the concept of space, the standard arranges the translation, rotation, axisymmetry of the graphic, and uses coordinates to describe the position and movement of the graphic. In the elementary school, “Movement of Graphics” was arranged for three times. The first session was arranged once, focusing on the overall feeling and helping students to intuitively recognize the translation, rotation and axisymmetry