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1.选好“原题”。问题是载体,因此选好原题尤为重要。原题的选择应取材于最普通、最常见的习题,学生都能接受,不宜过难;所选的原题要注意知识的横向联系,具有延伸性,可进一步一题多变;对原题的解法不宜技巧性过高,应讲究通性通法,即能用基础知识,基本方法加以解决。2.做好变式。习题选择要有一定的研究性,不是为做题而做题,要达到“一题多解,一题多变;多解归一,挖掘共同本质”。
1. Select the “original title”. The problem is the carrier, so selecting the original title is especially important. The choice of the original title should be based on the most common and common problems, students can accept, should not be too difficult; the selected original title should pay attention to the horizontal relationship of knowledge, with extensibility, you can further change the subject; the original title The solution should not be too technical, should pay attention to the general method, that can use the basic knowledge, basic methods to be resolved. Make a good variant. Exercises have to be a certain degree of research choice, not to do the problem and do not want to achieve “a question and more solutions, a changeable; more solution to one, mining the common essence ”.