Well, technically, she is now a she even though she was born a he…it really is neither here or there for us because it is between that person and God in the end… Not really…he was born a he and even though changed outward appearance to look like a she, he is still a he (xx nor xy) unless we have advanced and that can also be changed?
but in your child’s reality, Mr. X now goes as Ms. Y and that is how your child will be expected to address her. It’s a matter of respect for elders/teachers. Even though the person themselves may not deserve your child’s personal respect, your child, being a minor, is obliged to show respect at all times. That is a crucial life lesson.
I can have total disdain for my boss (I don’t, of course) but rules of protocol dictate I cannot show that disdain to him/her at the office. And Catholic rules tell me I can’t share that disdain with others (gossip), nor can I bring it home to share (uncharitableness), so I’d have to take my disdain with me to Adoration to ask Jesus to help remove it from my heart.
Bottom line, as Catholics, we are not allowed to be uncharitable towards lost souls, but we are called to reach out to them, their souls, in an effort to save them. Can’t very well do that if I’m cursing them under my breath every five minutes or can’t bring myself to look them in the eye because I’m so repulsed by their actions.