... btw, the only time I ever lost a student was one time that I was harshly critical instead of positively critical, which is what I always strived to do. It was my idiot V.P.’s daughter, so might have been something more to it than just straight feedback, but I still regret the tone of my criticism.
Other than that I always remained positive, leaving it to the kids to decide if they wanted to act on my teaching or not. Teachers who insist on imposing outcomes on students will always lose them.