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建模点1:“圆”的概念模型所属内容:第56-57页例1、例2学生在日常生活中经常接触到圆形物体,在低年级也已经初步认识过,但都是直观的表象的认识。本单元教材紧密联系学生的生活环境,呈现出丰富的圆形物体,让学生充分感受圆的广泛应用,激发研究兴趣的同时,引发思考:为什么很多物体要设计成圆形?怎样得到一个圆?圆有什么特征?在不同的操作活动体验中,感受圆,感悟圆,用所学知识解释圆,理解它在现实中的存在价值。
Modeling Point 1: The Conceptual Model of “Circle” Affiliation: pp. 56-57 Example 1, Example 2 Students often come into contact with circular objects in their daily life and have also been initially recognized in the lower grades, but both are Intuitive representation of the understanding. The unit teaching materials closely related to students’ living environment, showing a rich round objects, so that students fully experience the wide range of applications to stimulate research interest at the same time, triggering the question: why many objects to be designed into a circle? How to get a circle? What are the characteristics of a circle? In different operational experience, feel the circle, sentiment circle, use the knowledge to explain the circle, to understand its existence value in reality.