Uhh..I don't see the problem there.
Question... If, as the radical Left proposes, a man got pregnant would he have to submit to a DNA test to see if the child were his?
LOL Of course you don't.
It's not the they're/their reference but the comment about using a a plural pronoun in place of a singular pronoun. She's slamming Lefties for using "their" instead of his or her, then she uses "their" instead of his or her.
I❤Irony
Yeah, because you don't know what sex the teacher is; So "their" works.