中学数学教师都要深入理解中学数学概念,这是提高教学质量的基础.否则,便会产生许多不良的影响和后果.区间是中学数学中的重要概念,不少数学教师对区间的定义不注意理解,导致忽视了区间的概念,造成了一些不必要又影响重大的误解,从而导致了学生对相关问题的理解存在障碍. Middle school mathematics teachers should thoroughly understand the concept of mathematics in middle school. This is the basis for improving the quality of teaching. Otherwise, there will be many bad influences and consequences. The interval is an important concept in middle school mathematics. Many math teachers do not pay attention to the definition of the interval. Understanding, leading to the neglect of the concept of the interval, caused some unnecessary and significant misunderstandings, which led to the student’s understanding of the relevant issues there are obstacles.