Carbonated
We need to be careful of assuming a child aught to leave if they 'identify' as the other gender. They are still legally and have the physical serial attributes of, the 'gender' they were born with
If it is a boy 'identifying' as a girl, should they be made to leave and potentially then join a girls school, but still retain the physical sexual characteristics of a boy? If I had a daughter in a girls school, I'd rather not be faced with that situation.
Let's not forget that gender is what you think you are, it's not what you actually are. Your sex is what you are. Unless of course you actually change it.
(A bit like me 'identifying' as a supermodel, but knowing I'm not actually one!)
‘ Unless you actually change it’?
Surely you can’t do this, and you will always have the XX or XY chromosomes, no matter what cosmetic procedures or hormone therapy you undergo?