http://headlines.agapepress.org/archive/1/afa/92006a.asp
The first amendment states very clearly:
"Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof."
So it's true that the Constitution does not use the words "separation of church and state." But really, what else could be implied by that? They cannot support one religion over another, and cannot prohibit any religion. Easiest route? Stay out of it.
So, sure, I guess a 10 commandments display would be allowable in school, providing the state didn't pay for it, and there is, I don't know...a display of the 5 pillars of Islam next to it? Allowing the 10 commandments is supporting Christianity (and Judaism, I think) above other religions.
"That unanimous court of appeals decision has the potential to affect intelligent design, Ten Commandments displays, Nativity scene displays, and perhaps even prayer in schools..."
Intelligent design cannot be taught in Biology classes simply because it is NOT a valid scientific theory. If anything, it is a philosophy. Leaving any gaps in your theory for the supernatural INSTANTLY discredits it. End of story.
Prayer in school? Acceptable, if student-led in a setting where non-Christians don't have to put up with it.
Nativity scenes are ugly, I don't know why they'd WANT to put them up. But they would certainly be supporting Christianity over other religions.
So even if there is no wall between church and state, the Constitution DOES say that the government cannot support or deny any religion.
Of course, if they want to put Christianity into schools, I guess they could stop having school functions on Wednesday, Friday, Saturday, and Sunday. They could stop serving meat in the cafeterias, and could allow Muslims to pray towards Mecca 5 times a day. If they want to put one religion in school, then the Constitution dictates that all others must be put there, too.
Is it really worth it?