五年级沪教版第二学期数学专门设有一单元“几何小实践”研究体积和表面积,本单元涉及的知识点多,题目的灵活性大,要求学生具有较强的空间观念,而如何促进学生对几何基本概念的理解和培养学生的空间观念,仅仅依靠教师抽象的讲解和反复做题是难以奏效的,部分学生知其然,但不知其所以 Fifth grade Shanghai Pupils second semester mathematics specifically with a unit “small geometry practice ” study of volume and surface area, the unit involves more knowledge, the topic of flexibility, require students to have a strong sense of space, and how Promote the students to understand the basic concepts of geometry and students to develop the concept of space, just rely on the teacher to explain abstract and repeated questions is difficult to work, some students know it, but I do not know why