“教学应该以学生的认知发展水平和已有经验为基础,面向全体学生,注重启发式和因材施教”.这是数学新课程标准倡导的基本理念之一,也就要求数学教师要结合学生的生活经验和已有知识设计富有情趣和意义的活动,使学生体验到身边有数学,用数学可以解决生活中的实际问题,从而对数学产生亲切感,增强学生对数学知识的应用意识,培养学生的自主创新能力.一、关注学生的知识水平,提高数学教学效率在教学过程中,教师要根据学生的认知规律, “Teaching should be based on the level of cognitive development and existing experience of students, for all students, focusing on heuristic and teaching students in accordance with their aptitude.” This is one of the basic concepts advocated by the new curriculum standards in mathematics, which requires that math teachers should combine Students ’life experiences and existing knowledge design rich in interesting and meaningful activities to enable students to experience the mathematics around them and to solve the practical problems in life by using mathematics so as to create a sense of familiarity with mathematics and enhance students’ awareness of the application of mathematical knowledge, First, pay attention to the level of knowledge of students and improve the efficiency of mathematics teaching In the teaching process, teachers should be based on the cognitive law of students,