When we were in Hawaii, my daughter attended the public elementary school on base. Hawaii has a state K-12 "Hawaiiana" program in which actual kahunas (priests) of the "old religion" teach children religious chants, dances, et cetera.
My daughter's fifth-grade class was preparing for a pageant honoring the Hawaiian goddess Pele. She had brought home the chant they were to learn, which began, "O great Pele, creator of the universe, we adore you...."
My daughter asked, "Do I have to learn this?" and we assured her that she did not. My wife talked to her teacher about that, and her teacher gave her an alternate reading assignment instead of participation in the pageant. So the next day, the assistant principal walked into the class and noted that while the other kids were practicing the chant, my daughter was sitting separately doing her reading assignment.
The principal challenged my daughter, "Why are you doing this and not that?" And after getting the answer from my daughter that she was a Christian and didn't think it was right for her, the principal further challenged, "Well, those other children are Christian, so explain to me why you have a problem with it when they don't?"
My daughter was challenged as well in high school, relentlessly by one particular teacher, who had continuous things to say about "Christians" that she had to choose to respond to or not...although by then she'd learned how to listen to the Holy Spirit about such things.