...look your children in the eye and warn them that they have to be very careful about who they tell things to. God forbid your son whimsically expresses interest in being a girl to a far-left public school teacher, who then arranges for them to be removed from your custody. Tell them that Mommy and Daddy will help you work through such things together, and that they can tell you anything.
Be non-judgmental, calm, and understanding, because if you're not, some far-leftist authoritarian will pretend to be in order to groom, seduce, and eventually abduct your son or daughter.
Stop right there. Why are you putting your kids in public school? That was your first mistake.
Probably money. I despise the public schools but with 3 kids and absent a school choice voucher system I can't afford to send my kids elsewhere, nor take off work to home school them. As I see it, it will be good practice for my kids to learn to ignore brainwashing as it is attempted in school.
You are making excuses because you don't want to make sacrifices. My family of 5 lives in a 34 foot 5th wheel so my wife can stay home and we can be more than financially sound. The thing is not only do we get to homeschool our kids but before the oldest one is 10 we will own our own land straight up (should that still be allowed in the USA by then). Your kids are more important than the things you will have to sacrifice to save them.