"Organized prayer in the public school setting, whether in the classroom or at a school-sponsored event, is unconstitutional. The only type of prayer that is constitutionally permissible is private, voluntary student prayer that does not interfere with the school's educational mission."
"[ T] he Establishment Clause forbids state-sponsored prayers in public school settings no matter how nondenominational the prayers may be." Lee v. Weisman, 505 U. S. 577 (1992).
Look it up if you need to. I posted a good site previously to help educate the unimformed.
