I’d be very careful about one asks for in this regard. Do we want the Muslim call to prayer being broadcast on the school PA system all day?
This is the proverbial camels nose in that tent.
At the risk of getting this thread locked, here is my two cents.
First off, that decision would be up to the voters of that particular school system or area. If the residents of Williamsburg, Brooklyn want Jewish prayers broadcast in their local schools, then the federal government should butt out. If you don't want muslim prayers on your local school PA system, then get involved with your local school board and set the appropriate rules. But again the federal government should stay the hell out.
As for Lemon v. Kurtzman, this is yet another bad decision of the Courts that injects its tyranny on the rest of us. There is no Constitutional basis for a court making up its own set of test rules (i.e. 'laws') that usurp the power of state and local legislatures. Nor is there any Constitutional basis for "separation of church and state". Furthermore, the Establishment clause of Amendment I applies to Congress only. It does not apply to States.
Also, it was Engel v. Vitale that ended school prayer, not Lemon v. Kurtzman.
For anyone wishing to discuss 'Establishment', I find it ironic how the Supreme Court deemed 'secular humanism' to be the one judicially sanctioned 'religion' allowed in public schools.
It is also ironic how the court used Everson (a case the prayer-haters lost) as the basis for overturning 160 years of original intent, where suddenly the Court seized the opportunity to repeal the Tenth Amendment and exert supreme judiciary control over every aspect of our free exercise.
The beauty of our Constitution is the balance of powers it provides through concrete limits on federal powers. And with our First Amendment, Madison emphasized this balance by grouping the Establishment clause alongside the Free Exercise clause - one that has been completely ignored by this same court. But either way, Amendment I places a limitation on Congress only - not on the Pennsylvania legislature.