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1.变式题的数量要“适度”教师在变式题的设计上一定要仔细斟酌,数量要适度.变式题太多,课堂的时间有限,教学任务肯定完不成,同时也增加了学生的负担;如果变式题太少,不利于学生对相关或相近问题进行延伸和拓展,不利于学生对概念的理解和掌握.因此,教师应该围绕教学重点和难点,设计适当数量的变式题,以达到课堂教学的高效性.2.变式题的难度要有“梯度”变式题的设计要让学生能够循序渐进,难度不能
1. The number of variant questions to “moderation ” Teachers in the design of variant questions must be carefully considered, the number should be moderate .There are too many variant questions, the classroom time is limited, the teaching task certainly can not be completed, but also increase The burden on students; if the variant questions too little, is not conducive to students to extend or expand related or similar issues, is not conducive to the students to understand and grasp the concept. Therefore, teachers should focus on teaching and difficult to design the appropriate number of changes Style in order to achieve the efficiency of classroom teaching .2 the difficulty of variant questions should be “gradient ” variant design of questions to allow students to step by step, the difficulty can not