Must say hi to "suspended". I think it was the letter you put in every pigeon hole that SMT (and to be fair, most of the staff) regarded as misconduct (I can only assume you are who i think you are). You were a victim of a system that does not work. As a new HoD there was no-one to explain this. My own induction gave me the opportunity to discover that any issue that was refered beyond your department was going to be dealt with poorly. I could discuss this with my HoD but obviously your line manager was SMT and thus unable to admit the system was flawed. It also didn't help that your union rep was SMT - you should have been a NUT! These are the lessons the school has failed to learn: New staff need induction that includes PEER support (for the sort of advice that line mangers and SMT can't give); If a system is not working, it should be a priority to fix it rather than use it as an excuse for not helping teachers.