简单的是最有力的——整式运算的整体教学设计例谈

传统地整式运算教学费时费力。把教材过度分析化、条文化,割裂了各知识点之间的联系,没有突出主干知识,使学生失去了思考的本能。其实只要精简内容：所有的式都表示数,所有的变形都是化简,抓住关键：整式运算的本质与数的运算一致,目标明确地交给学生自己去探究。

Simple is the most powerful——overall teaching design of integral expression operation

It wastes time and energy to teach traditional integral expression operation. This is because people analyze the teaching material excessively and mechanically. It has separated the relations between various knowledge. Thus the main knowledge is not prominent. As a result, it has caused the students to lose the instinct thinking. The key point to solve this problem is to simplify the teaching content. All algebraic expressions equal a number. All changes are the simplification of the algebraic expression. T...