《小学数学新课程标准》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、和谐的发展。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,强调从学生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,进而使学生获得对数学理解的同时,在思维能力、情感态度与价值观等多方面得到进步和发展。短短40分钟的课堂,教师与学生双边互动,共同参与。教师介入的比重越大,学生 The “New Curriculum Standard for Primary Mathematics” states: The basic starting point of mathematics curriculum in compulsory education period is to promote the development of students in a comprehensive, sustained and harmonious way. It should not only consider the characteristics of mathematics itself, but also should follow the psychological rules of students to learn mathematics, emphasizing from students’ existing life experience, let students experience the abstract problem of mathematical models and explain and apply the process, so that As students gain understanding of mathematics, they progress and develop in many aspects such as their thinking skills, their attitudes and values. In just 40 minutes, teachers and students interact with each other and participate together. The greater the proportion of teachers involved, students