My brother teaches high school and has had to deal with this insanity. He uses last names only while doing roll call then never refers to any student by any name thereafter.
He says it’s really tough because he feels he can be sued by the tranny’s parent who support their child’s mental disease when he doesn’t use their chosen name, but on the flip side, he can be sued by parents who do not support mental disease if he does call them by their chosen name.
Wise man.