I am always polite, professional and respectful when waking into a class, whether I know the pupils or not. Many of the pupils I encounter on supply, however, arrive determined to be disrespectful for whoever will be replacing their permanent teacher that day. They see, me ( an unknown adult) walking down the corridor towards them and I hear the messages being sent down the line, telling evryone that it's a supply and organising their gameplans. No matter how well I acquit myself, I'm on a hiding to nothing with some classes. Pupils do need to at least give their teachers the benefit of the doubt, and due respect, before feeling entitled to withdraw co-operation in a lesson. The trouble is that many youngsters equate respect with fear. They respect the gang leader in their neighbourhood and the bullies in their school because they fear them and do not want to be targetted. They have no fear of their emasculated teachers or of their school's sanctions and so they have no respect for them. My definition of respect does not correlate with theirs. In many schools, SMT kow-tow to the most aggressive and disruptive pupils in a vain attempt to placate and transform them. They are simply embedding the rogue pupils sense of entitlement for 'business as usual' with irrelevant consequences. Until we, as teachers, can regain more autonomy in schools, the situation can only deteriorate. Education seems to have adopted the retail sector's mantra of 'The Customer Is Always Right'. Pupils are not our customers; they receive a free service from the system and they are CHILDREN! Their relationship to the adults in the system should be akin to that of an entry--level employee to their employer in the workplace. The power balance is crazily subverted in many schools. That's why behaviour is such a problem.