I'm not responding to the OP as it's pretty clear she either doesn't, or doesn't want to understand or listen to what people are saying.
But to anyone else reading the thread, I started working in a school three weeks ago (I'm not a teacher) and although I knew teachers weren't exactly skipping out the door at 3.30pm I am absolutely godsmacked at how much they have to do. It's constant and I can't see how any teacher gets to retirement age without completely burning out. I had NO idea.