If you as a parent want to see religion in your kids school, there are private schools you can send your kid to.
Guess why far-right conservatives want to cease all State-provided public education, and substitute vouchers for it, so that everyone ends up using private schools exclusively? The strategy is simple:
a) Make everyone use vouchers. Providing vouchers to parents technically doesn't involve anything religion-related.
b) Completely de-regulate the schooling market, starting by eliminating the Department of Education, and moving into making it sure States don't have any say on the matter either.
c) Allow educational conglomerates owned by Christianophile billionaires to near-monopolize the private school system, making sure the vast, vast majority of private schools near poor communities are religious, and enforce the teaching of their preferred religion.
And presto, Constitution bypassed!
Then, eventually, and evidently:
d) The educational monopolies and cartels start rising prices, so vouchers alone aren't enough to pay for children's education anymore, thus complementing the whole BS with traditional rent extraction.
Because building monopolies has to be worth the effort, hasn't it?