《数学课程标准》指出“数学教学活动必须建立在学生认知发展和已有的知识经验基础上”“学生的数学学习活动是在教师组织、引导下的自我建构和自我生成的过程”。教师尊重学生的生活经验和知识基础,准确把握学生的数学学习起点,合理处理教材,正确定位教学目标,是有效突破教学重难点、提高课堂教学效率的关键。那么,我们如何在教学中及时捕捉来自学生的资源,尊重学生已有的知识经验,让数学课堂灵动起来,使课堂教学彰显动态生成的活力 “Mathematical Curriculum Standard” states that “mathematics teaching activities must be based on the cognitive development of students and existing knowledge and experience.” Students ’mathematical learning activities are the process of self-construction and self-generation under the guidance and guidance of teachers’ organizations ". Respecting students ’life experience and knowledge base, accurately grasping students’ starting point of mathematics learning, reasonably handling teaching materials and correctly positioning teaching objectives are the keys to effectively break the teaching difficulties and improve the efficiency of classroom teaching. So, how do we capture the resources from students timely in teaching, respect the students’ existing knowledge and experience, make the mathematics classroom be agile and make the classroom teaching demonstrate the dynamically generated vitality