The discussion question

It is about a perfectionist teacher who wants to show to her student how to sing in a tough way, though it shows how it is useful to be harsh sometimes in order to give a strong and efficient method of teaching ; I mean in this Zen story, we can notice that the student's teacher was not satisfied with his way of singing so that,she pushed him to sing, to sing and to sing so as to ameliorate his performance and be a professional so it worked finally eventhough he did not get it at first and was complaining about his lack of progress.