教材简析:“圆柱的认识”属于“图形与几何”领域的内容,是小学阶段学习几何知识的最后一部分内容,是学生在学习了长方形、正方形、圆形等平面图形和长方体、正方体等立体图形知识的基础上进行学习的。这时,学生已积累了一定的学习几何知识的经验和思想方法,形成初步空间观念,可进一步探索含有曲面的几何体圆柱的基本特征,它是学生进一步发展空间观念,学习圆柱表面积、体积必备的基础知识。教学过程:一、从生活实物抽象出几何模型——揭示 Textbook analysis: “Cylindrical knowledge ” belongs to “Graphics and Geometry ” the content of the field, is the last part of the elementary school learning geometry knowledge, is the students learning rectangle, square, circle and other flat graphics and rectangular , Cubes and other three-dimensional graphics based on the knowledge of learning. At this time, the students have accumulated a certain amount of experience and thinking methods of studying geometric knowledge to form a preliminary space concept, which can further explore the basic characteristics of geometric cylinders with curved surfaces. It is a must for students to further develop their space concepts, study cylindrical surface area and volume The basics. Teaching process: First, from the physical abstract geometric model of life - Revealed