【主题与背景】新课改的课堂教学要以学生的发展为本,《义务教育数学课程标准(修订稿)》提出要培养学生的创新精神和实践能力。但是如何让这样的教学理念在课堂教学中得到充分体现呢?现在小学中高年级学生已经普遍具预习的意识和能力,学生在学习之前已经对新知识有了一定的了解,但这种了解更多的只是停留在对知识结论的认识上,是比较肤浅的认识。在课堂教学中如何充分尊重、利用好学生的这一知识基础,让学生真正经历知识的形成过程,让学 [Theme and Background] The new curriculum reform in class teaching should be based on the development of students, “Compulsory Education Curriculum Standards (Revised Draft)” proposed to cultivate students’ innovative spirit and practical ability. However, how to make such a teaching philosophy be fully reflected in the classroom teaching? Now middle-aged and high-school students in primary schools have been generally pre-awareness and ability, students have a certain understanding of new knowledge before learning, but this kind of understanding more Just stay in the understanding of the conclusion of knowledge is a superficial understanding. How to fully respect classroom teaching, make good use of this knowledge base of students so that students can really experience the formation of knowledge,