根据学生的心理特征,为学生创设知识和能力的最近发展区,是课堂教学最优化的重要环节,本文依这一观点谈谈数学新课的引入。一设计实物、模型引入新课实物、模型的特点是形象直观,从生活的直观到抽象的思维,是人们认识事物的过程。当教师展示、引导学生观察实物或模型时,学生会好奇地注视着实物或模型。例1 讲“平几图形的对称”时,教师首先拿出一张具有对称性的蝴蝶挂图,并提出:①图案从形的角度考虑它有什么特点;②如果过它的头和尾的中点连一直线,沿这直线把它折叠会产生什么结果呢?学生边观察边思考,学习情绪高涨。在立几教学中,可用实物、模型引入的课就更多了。但是, According to the student’s psychological characteristics, the most recent development area for the students to create knowledge and ability is an important link in the optimization of classroom teaching. From this point of view, this article talks about the introduction of a new mathematics lesson. The design of physical objects, the introduction of new models into the model, and the characteristics of the model are intuitive images, from intuitive life to abstract thinking, and it is the process of people understanding things. When teachers show and guide students to observe objects or models, students will look curiously at objects or models. Example 1 When we talk about the “symmetry of the figures,” the teacher first takes out a butterfly wall chart with symmetry, and puts forward: 1 The pattern considers what characteristics it has from the perspective of the shape; 2 If it passes its head and tail What is the result of folding the line along the straight line? The students are observing and thinking, and the learning mood is high. There are more classes that can be introduced using physical objects and models in the teaching of legislation. but,