The marriage ruling basically says that you can’t treat males and females differently in any way. In a school, the implications of that are far-reaching. On the one had, recent SCOTUS rulings point toward allowing school vouchers to be used in religious schools. On the other hand, that will likely come with the requirement to comply with the above. We need a couple of more good SCOTUS picks to set all of this right. Probably need Trump to be reelected with a Senate majority for that to happen. Fingers crossed.
On the other hand - they could teach BIOLOGY - and see how that works.
XX + XX = FAIL
XY + XY = FAIL
XX + XY = Human