初中数学课程标准指出:“义务教育阶段的数学课程,其基本出发点是促进学生全面、持续、和谐地发展.它不仅要考虑数学自身的特点,更应遵循学生学习数学的心理规律,强调学生从已有的生活经验出发,让学生亲身经历将实际问题抽象成数学模型并进行解释与应用的过程.”在上述新课标理念的指引下,我们看到许多教师在实践中能够根据教 Junior high school mathematics curriculum standard states: “The basic starting point of mathematics curriculum in compulsory education stage is to promote students ’comprehensive, continuous and harmonious development.It not only needs to consider the characteristics of mathematics itself, but also should follow students’ Based on the existing life experience, students can experience the process of abstracting practical problems into mathematical models and interpreting and applying them. ”Under the guidance of the above new curriculum standards, we can see that many teachers can practice according to the teaching