"Still not sure how passage of this Bill will affect me as a public school teacher!"
IIRC, there is a federal law that forbids firearms on school grounds, unless you are LEO or district security. I'm interested in that too, as I'm going to be a teacher. Working as a sub right now, waiting for my certification paperwork to get processed... and waiting, and waiting...
First of all, subs have about the toughest job in the system. My hat is off to you but I wonder about your judgment. Subs tend to make early burnout cases as regular teachers. Yeah, it MIGHT be good preparation, but it can wear you down, too. But then, I've taught in some very literal trenches over the years. If you're in a good environment, it might be great. What did you get your degree in? What level do you wish to teach? Subject?
IIRC you're correct about the federal law concerning guns on campus. No wait a minute....it's IN SCHOOL, not on the grounds because parents with a CCW can drive up the front drive and pick up their kids but they can't go into a conference armed. Also there may once have been such a law but it was invalidated by the USSC under the commerce clause of the 14th Amendment.