“函数”是数学学习中最基本且重要的概念之一,贯穿整个高中阶段的数学学习.但是,函数概念的教学中常常会遇到许多问题,其抽象性往往是造成学生理解困难的主要障碍.目前,教学中教师主要是按照课本所举的例子,引导学生进行归纳,从而概括出函数的定义.在一些案例中,虽然能在教学开始时引入初中内容作为切入点,但在之后的教学中往往又引用新例子,这样造成的结果是初高中知识难以实现自然 “Functions” is one of the most basic and important concepts in mathematics learning. It runs through mathematics throughout high school. However, many problems are often encountered in the teaching of function concepts. The abstraction is often caused by students’ difficulty in understanding. The main obstacles. At present, teachers in teaching mainly follow the examples given in the textbooks to guide students to generalize, so as to summarize the definition of the function. In some cases, although junior high school content can be introduced at the beginning of teaching as an entry point, after In the teaching, we often quote new examples. The result is that the knowledge in the middle school is difficult to achieve