When I was in school in the 80's, the largest schools were Butler, Penn Hills, Gateway, Norwin, NA, North Hills, Mt Lebo. The Woodland Hills happened. But those eastern suburbs grayed over and decayed. Butler, not sure what happened, meth capital of Western Pa. Schools like Mars, Pine Richland, South Fayette were cow schools, A and AA schools.If Allegheny County population is only down 9%, it is IMPOSSIBLE that the HS age population is down 75%. Allegheny County is old, yes. But having a rudimentary knowledge of statistics, I can tell you that if the entire population is only down 9%, HS age kids cant be down by more than 20% and 20% might be stretching it.