几乎高中数学的每个章节,都是数学某个重要分支的起点。如复数是复变函数的起点,数列是数学分析的起点,等等。当教师带领学生站在起点位置上,心中就应该知道终点是什么,否则就会很盲目。“平面向量”的起始课就容易出现这样的问题。讲平面向量之前,笔者问一些教师:假如学生问我们为什么要学习平面向量,我们怎么回答?有老师说,向量具有工具性,与物理联系紧密,可以解决解析几何问题。笔者问:“既然是工具,我们可以有,也可 Almost every chapter in high school mathematics is the starting point for an important branch of mathematics. If the complex number is the starting point of the complex function, the number is the starting point for mathematical analysis, and so on. When the teacher leads the students to stand at the beginning, the heart should know what the end is, otherwise it will be very blind. ”Flat Vector “ starting class is prone to such problems. Before we talk about plane vectors, I ask some teachers: If a student asks us why we want to learn about plane vectors, how do we answer? Some teachers say that vectors are instrumental and physically connected to solve analytic geometry problems. I asked: ”Since it is a tool, we can have, but also