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《二元一次方程与一次函数》的教学具有一定的难度。从学习内容讲,具有综合性和抽象性。从学情角度讲,要实现函数和方程之间的相互转化,初二学生在认知水平和运用能力上还存在一定的差距,同时还缺乏对数学问题进行较高层次思考的能力。上海延安初级中学的李正辉老师执教的这堂课,让我们看到了一节高水平的数学课。这节课着眼于数学知识背后的数学思想方法,深层次的数学思考,思维训练和数学美的享受,把二元一次方程和一
“Binary one-time equation and a function of” teaching has a certain degree of difficulty. Speaking from the learning content, with a comprehensive and abstract. From the perspective of learning situation, in order to realize the mutual transformation between function and equation, there are still some gaps in the level of sophistication and ability of sophomore students, meanwhile they lack the ability to think higher level of mathematical problems. Shanghai Yan’an Junior High School teacher Li Zhenghui taught this lesson, let us see a high level of math class. This lesson focuses on mathematical thinking behind mathematical knowledge, deep mathematical thinking, thinking training and enjoyment of mathematical beauty, the binary equation and a