I know it's difficult for teachers to strike in the first place. I was not very good because teachers and students do not play with it much. But I believe that teachers need to be done. And most do not If teachers do not know the taste of the teachers would be happy to teach students of 4/5 to be happy. Last but not least, ask the teacher lucky. And hope that what I recommend teachers to be effective, some good and best. This student, do not forget it.