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建模点1:“平行”的概念、模型和“平行线的画法”模型所属内容:信息窗1(第48页~51页)教材简析:教材素材的选取体现科学性和现实性,引导学生关注生活与社会。教材选取了与生活紧密联系的素材为学生提供了熟悉的问题情境。本信息窗呈现的是马路上的相交线和平行线。通过解决问题“图中的几组线有怎样的位置关系?”引入对平行线的认识。借助问题“你能画出一组平行线吗?”引入对平行线的画法的学习。通过本信息窗的学习,结合具体情境,认识平行线,会画平行线。教学建议:一、“平行”的概念模型1.借助实物抽象,初建“平行的认
Modeling point 1: ”parallel “ concept, model and ”parallel line drawing “ model Belongs to: Information Window 1 (Pages 48-51) Teaching material analysis: the selection of teaching material reflects the scientific And reality, to guide students concerned about life and society. Materials selected with the close contact with the life of the material provides students with a familiar problem situation. This information window shows the intersection of the road and the parallel lines. By solving the problem ”What kind of positional relationship does the group of lines in the graph?“ Introduce the recognition of parallel lines. With the help of the question ”Can you draw a set of parallel lines?“ Introduces the study of parallel lines. Through the study of this information window, combined with the specific situation, understanding of parallel lines, will draw parallel lines. Teaching Suggestions: First, the ”parallel“ concept model 1. With the physical abstraction, the first built ”parallel recognition