“空间观念”是数学学习的核心概念之一。《标准(2011版)》从四个方面对空间观念进行描述:空间观念指根据物体特征抽象出几何图形,根据几何图形想象出所描述的实际物体;想象出物体的方位和相互之间的位置关系;描述图形的运动和变化;依据语言的描述画出图形等。培养初步 “Space concept ” is one of the core concepts of mathematical learning. The Standard (2011 Edition) describes the concept of space in four aspects: the concept of space refers to the abstraction of geometrical figures according to the characteristics of objects, the visualization of the actual objects according to the geometrical figures, the orientation of the objects and their positional relationship with each other Describe the movements and changes of graphics; Draw graphics based on language descriptions. Initial training