Then lucky you. A lot of schools have prohibitions about praying in schools and the list is growing every day. You should do your homework before you jump on someone and call their postings bogus!
Where do you live? I moved on purpose so that my kids would have the freedom that they do.
FWIW, I grew up and went to school in California and have raised my children in California, Pennsylvania and Oklahoma. The Union is not a monolith.
I really doubt that this is the case. Do you have source for this claim?