This week, I've been modeling "you may get to class on time". Some of our students spend extended time at their lockers or chatting in the halls - which prevents them from getting to class on time. Instead of saying "your late", or "your going to be late", I've started saying "you may get to class on time." Those simple words have made a huge difference. I'm now getting a smile back and an "ok", following the students immediately going right to class.
Five days later, I'm now hearing fellow teachers say those same words. Kids are responding positively, and our hallways are running smoother.