习题教学 ,最忌讳两件事 ,一是用极其繁难的思路方法把学生弄得头晕脑胀 ,二是用极其不自然的技巧把学生弄得茫然四顾 .什么是好的解法 ,值得我们思考 ;解题后的反思 ,应引起我们重视 .《数学通报》上的数学问题及其解答 ,多颇有创意 ,但也有个别解法并不算好 ,试举三例与原作 Practice teaching, the most taboo two things, one is to use extremely difficult ideas and methods to make students feel dizzy brains, and second, with extremely unnatural skills to make students out of tune. What is a good solution, it is worth our thinking; Reflections after problem-solving should arouse our attention. The mathematical problems and their answers in the “Mathematical Bulletin” are quite creative, but there are also individual solutions that are not considered good. Three examples and original examples are cited.