"In schools back on my world there were surveys about how well the teachers were doing. Student evaluation forms. They were to help the teachers know where they weren't getting through to people effectively. They didn't always work, for various reasons; I think if I survey people you're teaching they won't tell you anything you might be doing wrong."
"I remember that you have sometimes been bothered by the prospect of someone telling you something whether it was true or not, even when you thought you did know the truth of the matter."
"I don't sit in on all your classes and I am not reading your students' minds, so I don't know all the things they might not know about how you're doing. They might not tell you because you're the prince or they're worried you might be fragile for family related reasons."
"Good, that would have been upsetting. What did you really think I'd say?"
"...No, that falls below my standard for consent on mind-reading and anyway doesn't address the underlying problem, if in fact you consider it a problem, plus it makes it all my job."
"Well, you can't make them tell you - and shouldn't try - but you can try to make sure you seem approachable, so if one of them is thinking about it they could feel like they could tell you."
"I think that prevents you from being intimidating but not unapproachable."
"I still don't sit on your classes and am still not reading your students' minds. My impression from what I have seen is that you're pretty good but kind of bossy, but I can't unpack for you how this is impacting your students because I'm not one of them, or reading their minds."