Originally Posted by Aramike

You're discussing the wrong side of the amendment.

A school allowing prayer is not a "law" enacted by Congress or any governing body. Now if the school required prayer due to a law, than it would be unconstitutional.

However, the amendment DOES read "or prohibiting the free exercise thereof." These days it seems that many atheists and anti-theists have forgotten what the word "free" means. Hint - it doesn't mean "free, EXCEPT in the following cases".