http://q13fox.com/2017/09/13/debate-over-bill-that-would-allow-school-employees-to-carry-guns-in-pa/House Senate recently passed a bill that would give school districts the option to allow licensed CCDW employees (with proper training) to carry while at work.
The driving force behind the bill is that many of the rural school districts have lengthy police response time, which would be a problem if an emergency were to occur.
State House is set to discuss bill in the near future, but the Governor has already said he plans to veto it if it arrives.