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1 教材背景分析依据《数学课程标准》编写的教科书在编排结构体系上作了一些有益的创新,采用螺旋上升的方式呈现重要的概念和思想.比如对方程和函数的处理,就改变了以往“先集中出方程,后集中出函数”的做法,按照“一次”和“二次”的数量关系,交替有序地出现一次方程(组)、一次函数、二次方程、二次函数.这样处理在分阶段地深化对方程和函数的理解的同时,也强
1 Textbook background analysis Textbooks written according to the “Mathematics Curriculum Standards” have made some useful innovations in the choreography structure system. They adopt spiral ascents to present important concepts and ideas. For example, the processing of equations and functions has changed the past. “First concentrate on the equations and then concentrate on the function”. According to the quantitative relationship between “first time” and “secondary”, an equation (group), first function, quadratic equation appears alternately and orderly. Quadratic functions. This process is deeper in stages while deepening the understanding of equations and functions.