From trainee teachers to veteran, battle-hardened staff, the recurring nightmare is of a class of teenagers who simply will not do as they are told. The stomach-clenching, hand-trembling, knee-jittering question we ask ourselves at the start of each new year is, 'What if the pupils walk all over me?' No matter how confident we are in our own abilities, regardless of our position in the school, irrespective of the reputation we have built for ourselves,...