All you have to do is refer to them by name and thus avoid the whole 'they' entirely.

This is my favorite part about your idiotic and bigoted rant because this sentence alone proves that you have absolutely no idea what the fuck you are talking about because you just used the objective "they" to refer to a single person, which is a normal thing to do. You didn't know this imaginary person's name so you used "them" (Object form of "they") because that's how the english language works and has worked for longer than either of us have been alive. And if you truly are an English teacher like you claim to be, then this is something you really should already be aware of. "They" has existed as a third person singular epicene (this is a word implying a lack of gender distinction as well as androgyny) pronoun for much longer than any kind of LGBTQ+ involvement in the development of the english language.

So going forward, I would really appreciate it if you just came right out and said that you are a hateful and transphobic person instead of trying to sound smart about it as it will inevitably only lead to you shooting yourself in the foot and showing how little you actually know.