What does it take to make a great head teacher? Martin Tissot explains to Joanna Moorhead that solving bad behaviour is the key to success Martin Tissot moves fast, which is a good thing as he has three sizeable secondary schools to get round today. We are currently having a whistle-stop tour of the classrooms and sports grounds at St Thomas More in Wood Green, north London; later on, he will be doing a similar quick trot around St George’s in Maida Vale and Bishop Douglass in Finchley. The reason he has to see them all is simple: he is the head teacher. Of all three.Tissot is one of an elite band known as “superheads” or “education troubleshooters”, whose forte lies in turning round schools in the doldrums. It is not a label he likes, as he e