设计思路本课教材的内容可分为两大部分:1.认识物体的弹性,建立弹性、弹力的概念。利用典型材料,让学生用多种感官、多种方法对物体进行感知,通过捏、压、挤、拉等动作,体会这类物体的共同属性:在外力作用下形状会发生变化,去掉外力后会恢复到原来的形状。总结出物体的这种性质叫弹性,感受形变物体的弹力。 Design ideas The content of the textbook can be divided into two parts: 1. Recognize the flexibility of the object, to establish the concept of flexibility, elasticity. The use of typical materials, so that students with a variety of senses, a variety of ways to perceive objects by pinch, pressure, squeeze, pull and other movements to understand the common attributes of these objects: the shape changes under external force, remove the external force Will be restored to its original shape. Summed up the nature of the object called elastic, feel the elastic deformation of objects.