My music teacher at school commented on how my private piano teacher was teaching me and he said that she was teaching me the wrong wrist and finger positions.I am i bit unsure about what i should do ,i was thinking about mentioning it to her but she might get upset if she feels that someone else is criticising her teaching.What should i do?

Did your school teacher say what he thought was wrong?

I'd be a little surprised if there was a major problem if you've got to grade 7.... has there ever been a comment about it on your exam mark sheets?

Teachers are notoriously bad for criticising things in musicians they don't teach!

I know, too, that when I take on a new pupil I almost always change something about their technique. We were all taught the way we were and I suspect we pass that onto our pupils and expect them (and everyone else) to play that way! Some technical aspects of playing are pure personal preference - others are rather more critical. You need to assess where this criticism of your playing falls.

I think you can, perhaps should, raise this with your teacher. You've done well getting to Grade 7 and you could ask her if she thinks your hand position is still ok now you're moving to a more senior level in your work. If necessary, commenting that someone at school (doesn't have to be your teacher by name) has commented on the way you play.

Sometimes my own pupils tell me things people have said about their playing. Yes, of course, it hurts momentarily if you feel, however indirectly, your teaching is criticsed but the sensible professional gets on with the job, evaluates what's been said and then either changes something or says "no problem" and leaves things alone. We can all learn from someone else and it is easy to get into a teaching rut and not see things in your pupils which are glaringly obvious to others.

However, you know your teacher and your relationship with her - I don't. Either put this to rest as just one of those things, or seek some way to explore this further that will cause minimal hurt to all concerned. Whatever, at some point you'll need to be open with your present teacher unless you are going to drop the matter completely.

Thank you ,its good to know that this is not just a thing that happened to me only!