单元整体视角下初中数学章起始课的设计研究——以“勾股定理”章起始课为例
Research on the Design of Chapter Initial Lessons in Junior High School Mathematics from a Holistic Unit Perspective—Taking the Initial Lesson of the “Pythagorean Theorem” Chapter as an Example

章起始课作为单元内容的开始，对整个单元的学习有着统领和导向作用，有利于学生全局观的形成和完整知识体系的建构。本文以“勾股定理”章起始课为例，从单元整体视角出发探究如何开展章起始课的教学，并提出结论：注重整体设计，厘清课堂主线；巧用情境引领，突出学生地位，以为初中数学章起始课教学提供一定参考。
The initial lesson of a chapter serves as the beginning of the unit’s content, playing a leading and guiding role in the entire unit’s learning process. It is beneficial for students to form a global perspective and construct a complete knowledge system. This paper takes the initial lesson of the “Pythagorean Theorem” chapter as an example, exploring from a holistic unit perspective how to conduct the teaching of the initial lesson of a chapter, and proposes the conclusion: focus on overall design, clarify the main thread of the class; skillfully use context to lead, highlight the student’s position, to provide certain references for the teaching of the initial lessons of junior high school mathematics chapters.