whatsthatcomingoverthehill -- so true and I'm sorry that you didn't get the sort of teacher who could help you nail the technique you wanted.
Unfortunately, there are LOTS of 'music' teachers out there... people who did a grade 8 or who enjoy playing.. but do they understand physiology, child development and the psychology of learning? What do they actually know about kinesiology? I ask only because I think it is really important to ensure that a child can play (physically) properly and that the teacher actually knows how to teach.
For example: It's not enough to tell a child 'don't slouch' when playing the piano. Children do not naturally 'slouch'...rather, ask: is the piano bench the right height? Does the child's feet touch the floor, are the hands in the right position over the keyboard? Is the child the correct distance from the keyboard? Is the child tired? (if yes, the lesson should include stretching and/or should be structured into smaller bits... (I'm not even a pianist .. this is just from watching the lady who teaches my own kids))
Bad habits can result in nasty repetitive strain injuries - and I don't care how wonderful the institution is that produced your child's teacher .. or where it is that your child studies... if it hurts, then it's wrong. If your child is bored - there's probably a reason for it.
Ask other parents who their kids study with (and why), Google, check ESTA facebook page or EPTA (for piano)... go to masterclasses and performances whenever you can, READ.. watch videos... learn as much as you can ..
Music education is so much more than that 15 minutes a day with instrument in hand. A proper music education is a gift for life...