The first is the effect. The average customer is most concerned about the effect. If the practice has no effect, it is useless for you to respect him again. Of course, if make-up lessons are zero when the effect is good, then there is something wrong with your interpersonal relationship and teaching methods. Properly handle individual academic members, attend classes strictly, and maintain the image. Pay more attention to members after class. You can communicate with them and help them solve the problems within your power. But pay attention to keep a proper distance.