I've been having a good experience as a supply teacher, (despite the horrors of the grammar a few weeks ago), and my tips are these 1)If there isn't a proper "all subjects" staff room and a "good morning" briefing from Deputy Head, then its a bit of a sad school.... nobody knows who is who and nobody cares... 2) If the staff member that you are covering, has sellotaped the work to be covered, onto the desk in his/her room, then its a good school and there is a respect for supply teachers and pupils. If its a dismissive "oh, its on the computer, but you don't have a login.." type of school, RUN. You'll get no respect. Complete your contract and leave. 3) If a staff member greets you with a smile and directs you to the tea, coffee... you're in a good school. If there's none of that …. just be careful... 4) If there is a clear policy about student code of conduct that is actually enforced , and they tell you.... you're in a good school. If you get the feeling that students can get away with bad conduct, (as in the grammar school), then be aware that you will be blamed for everything. RUN. 5) If the students stand up when an adult enters the room, (as in the current supply booking), then you're in a good school. If the students behave like a supply teacher is a waiter and they click their fingers at you, (as in the grammar school), RUN... it won't get better. 6) If the students line up outside the classroom and enter into the classroom in a respectful way, you're in a good school. If the students enter into the classroom like a herd of baby elephants, .. (as in the grammar school), and have no idea that there is a better way to "be", then you're in a tiresome school.