根据课程标准,帮助学生积累数学活动经验是课堂教学的一项重要目标,不仅是其经历、体验活动过程的结果,更是提高其学科素养的途径,对其思维、能力的培养、发展有重要作用。那么,如何引导积累呢?就需要树立“以生为本”的观念,精心设计活动,着重于学生思考、交流过程的引导,促进其体现、感悟,在解决问题的同时积累经验。一、巧用生活认知,开启活动教学在教学“三角形三边的关系” According to the curriculum standards, helping students to accumulate experience in math activities is an important goal of classroom teaching. It is not only the result of their experience and experience of activities, but also a way to improve their academic literacy, which is important for the cultivation and development of their thinking and abilities effect. So, how to guide the accumulation? It is necessary to establish a “student-based” concept, well-designed activities, focusing on student thinking and communication process to guide and promote their performance, perception, problem solving at the same time gain experience. First, clever use of life cognition, open teaching activities in the teaching of “triangular relationship between the three sides”