《数学课程标准》十分强调数学与现实生活的联系,其教材叙述的基本形式是“问题情境——建立模型——解释与应用”。它以完整、真实的问题情境作为支撑物启动教学,使学生产生学习的需要,同时情境的表征、视觉本质又促进学习者进行自主学习,从而达到主动建构知识意义的目的,从中 The standard of mathematics curriculum emphasizes the connection between mathematics and real life. The basic form of teaching materials described is “problem situation - model building - interpretation and application”. It takes the complete and real problem situation as the supporter to start the teaching so that the students have the need of learning. At the same time, the representation of the situation and the nature of vision promote the learners to learn independently so as to achieve the purpose of actively constructing the meaning of knowledge.