That is a great point regarding competing interests at the high school level and dialing back if the situation warrants it. I have no intention of acting as a practice "Nazi" as I believe the choice should lie with them at that age. However, music lessons are expensive ($60 to $100+) where we live so I am not willing to expend that much weekly (times 2 for 2 kids) if they are not committed to improving. It is not that I would withhold lessons, just not provide 60-minute lessons with a distinguished musician. If they wanted to play for fun, 30 or 45 minutes with a teacher with a typical background is a reasonable compromise so that money can be used for something else.