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《数学课程标准》(2011版)指出,教学活动是师生积极参与、交往互动、共同发展的过程;教师要发挥主导作用,处理好讲授与学生自主学习的关系,引导学生独立思考、主动探索、合作交流,使学生理解和掌握基本的数学知识与技能、数学思想和方法,获得基本的数学活动经验。学生应当有足够的时间和空间经历观察、实验、猜测、计算、推理、验证等活动过程。教学中,教师应立足于学生,着眼于学生的发展,关注学生的参与程度与学习
The Standard of Mathematics Curriculum (2011 Edition) pointed out that teaching activities are the process in which teachers and students actively participate, interact, and develop together. Teachers should play a leading role in handling the relationship between teaching and students’ autonomous learning, guide students to think independently and take the initiative to explore , Cooperation and exchange, so that students understand and master the basic mathematical knowledge and skills, mathematical ideas and methods, access to basic mathematical activities experience. Students should have enough time and space to go through the process of observation, experiment, speculation, calculation, reasoning, verification and other activities. Teaching, teachers should be based on students, focusing on the development of students, students concerned about the level of participation and learning