You have to be very careful with PTSA, band boosters and athletic support clubs associated with the schools. The "ownership" can vary significantly depending on the school system. In our county system, "ownership" of all of these organizations was assumed by the county (even though they were all formally created by the separate groups). I am aware of others that operate independently of the actual school system. You need to investigate each system individually.
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Life without Jesus is like an unsharpened pencil - it has no point.