No wonder kids get confused about their so called "sexual Identity" when you keep throwing out meaningless/confusing words or phrases such as "hetero cisgender kids"!
I don't understand the phrase, so what chance does a kid have. (yes I have looked it up and am no better informed!)
They are schoolkids, boys and girls.
After the reach puberty AND maturity it might be time to start throwing your agenda and phrases around them!