要给学生“一杯水”,自己要有“一桶水”,这个观点早已是广大教师的共识,但在具体实践过程中,又有许多不同的看法.笔者认为这只是一个必要条件,而非充分条件.这里还有一个很重要的问题是:自己有了“一桶水”,怎样倒给学生“一杯水”.在现实中,有些教师,他们的“纵 To give students “a glass of water”, they must have “a bucket of water”. This point of view has long been the consensus of the teachers, but in the actual practice, there are many different views. The author believes that this is only a necessary condition, not Sufficient conditions. There is also a very important question here: “I have a bucket of water.” How do I give the students “a glass of water?” In reality, there are teachers, their “verticals.”