I think you need to actually look up SCOTUS decisions about these issues. You might be very surprised. We've experienced a few legal challenges from FFR, ACLU, etc that initially terrify school admins to react drastically. But there are excellent Christian legal counsels that come in pro bono, having only to pass out brochures explaining our rights, the legal decisions, and make a few friendly phone calls from superintendent office phones. They are back to the airport in a few hours, the crisis over. You might not be familiar with variously named "lab" projects allowing exceptional students to help other students, actually leading classroom projects. Student to student creation science instruction is not illegal. Neither is studying the Bible in school for learning ancient history. Student led prayer is OK, though that does invoke frequent challenges requiring more courageous actions by students demanding their rights be enforced. Teachers and admins organize curriculum so there is plenty of quality time to include other topis.
There are a lot of young people who have been taught both sides together in private and Christian schools. Many rural public schools have taught both for many years, not having anyone come along challenging. In communities dominated by Christians that sort of thing, like "Prayer around the Pole" every year, Christmas displays, Bibles in classrooms, etc are common.
It is all turning around very slowly. Many well educated students will soon vote, while poll workers are saying typical teens eligible to vote are not showing up. The more educated the student, the more exposed to more than minimum knowledge, the more informed as a voter, and the more active to engage in community support.
By typical teens, I have always required face to face job applicants, no online apps, no mail-ins. They get a three page application. Most sit staring at it, wanting to take it home then bring it back. I say "I want to see you write." I will not let them have someone do it for them. They can't often read and comprehend statements written for a 12th grade student. That is a national shame. When a private or Christian high school graduate applies they always fill it out in minutes, legibly and coherently, showing lots of maturity and respect, good posture, tasteful dress, well groomed, alertness, and glad hope. Those are not typical teens. They are exceptional, but my hope is our youth will be mostly typically brilliant sooner than foreign workers take the last of good jobs. They are taught manners and work ethics all through their grade school years. Imposing bans and restrictions on students concerning any popular topic is like the old RCC stopping any scientist claiming a round world. Let their eyes be opened, see what a citizen should be like.