近几年我时时注重课堂教学的精心预设与非良构问题的动态生成与利用的研究。可是由于学生思维的多指向性使课堂问题生成的质量、效果良莠有别。这引起了我的关注:有些没有思考价值、脱离数学味的课堂问题生成是低效的,甚至错误的。如将所有课堂生成的问题均一把抓,势必造成时间上的浪费。有意识地让课堂生 In recent years, I have always attached importance to the research on the dynamic creation and utilization of carefully preset and non-good-constructed problems in classroom teaching. However, due to the multi-direction of the students thinking so that the quality of classroom problems generated, the effect is different. This arouses my concern: Some do not think about the value of the classroom problems generated from mathematical taste is inefficient, or even wrong. If all the problems generated by the classroom are caught, it is bound to cause a waste of time. Consciously let the class live