Hello, I am new here and think this forum is exactly what I need in order to receive some guidance. I teach a junior class within a small club, I have about 20 students aged from 7 to 12. I train them and the main club instructor (my sensei) grades them, he sees them in class a little and invites some of them to do the first half of his class. Recently, some of the students in the senior class, who are late teenage and on their 20s, have been criticising the standard of the junior class and newer members of the senior class. I take it as a personal insult regarding the juniors and I am fully aware that I shouldn't and that is a personal flaw I need to work on (any advise on this would be appreciated ) However I also think that it is an insult and disrespectful to our senior instructor. He has been training for over 40 years and knows what he is doing. If he thinks they are good enough to wear their belts then out of respect that shouldn't be questioned. He's not the type to pass people for no and stands by the moto "it's a marathon, not a sprint". The students who are criticising are also complaining about the way our main instructor is running his class. I am adamant that he is doing nothing different and would not and is not focusing on newer members. I was wondering if anyone can offer any advice on how to deal with this. I don't want to go in heavy handed and say if you don't like it leave, I would like them to be more respectful and understand that they were not always the standard they currently are. I remember them all as young grades and we treated them the same as we do our junior grades now. They have the perception that standards have dropped and the current junior grades are miles away from where they were at the same grade. Any advice would be much appreciated. Thank you