《数学课程标准》强调数学教学应从学生实际出发,经历“问题情境——建立模型——解释与应用、拓展”的基本过程.[1]著名特级教师孙朝仁关于情境创设的论述:好课之好,好在情境创设合理.创设情境是教学中常用的一种策略,有助于激发学生学习的积极性,有助于学生借助已有的知识和经验学习新的知识,有助于学生感受学科知识的价值.[2]苏科版初中数学教材主编杨裕前先生曾经说过,一个好的情境应该具有以下几个特征:一是学生熟悉的;二是简明的、真实的、合理的,简明、合理的情境,体现了数学化繁为简的理性精神;三是能尽快将学生引向所要学习知识的本质. “Mathematics Curriculum Standard” emphasizes that mathematics teaching should proceed from the students’ reality and go through the basic process of “problem situation - model establishment - interpretation and application, expansion”. [1] The famous super teacher Sun Chaoren’s discussion on situation creation: Good It is good that the situation is created reasonably.Sound creation is a commonly used strategy in teaching, which helps to stimulate the enthusiasm of students to learn, helps students to learn new knowledge with existing knowledge and experience, and helps students Feel the value of subject knowledge. [2] Suke version junior high school mathematics textbook editor Yang Yuqian once said that a good situation should have the following characteristics: First, the students are familiar; second is concise, true, reasonable, Concise and reasonable situation, reflects the rationalization of mathematics to simplify the spirit of the third is as soon as possible to lead students to learn the essence of knowledge.