一、教学内容《从蛋壳到拱桥》是苏教版自然教材第八册自然物和人造物单元的第一课。本课选择了以拱形建筑为例体的内容,让学生经历人类从认识蛋壳的功能和结构到设计拱形建筑的过程。二、教学目标认知:了解人类在研究和认识生物的特点及功能过程中得到启示,发明了许多为人类所 First, the teaching content “From the egg shell to the arch bridge” is the first lesson of the eighth book natural and artificial elements of the Sujiao version of natural teaching materials. This course chooses the arched building as an example, allowing students to experience the process of human beings from understanding the function and structure of the egg shell to designing the arched building. Second, the teaching of cognitive goals: understanding of human beings in the study and understanding of biological characteristics and functions of the process of enlightenment, invented many for the human