"I pondered over many possible titles for this book. Contenders such as "do we copy this down, Sir?" "How long to half term?" or "Has the bell gone yet" were all possibilities since they are probably the most frequently asked questions you will hear in your teaching career. I settled on the "SAS Guide to Teaching" because teaching is often perceived by the public as being one of the hardest jobs of all. I recently employed a plumber, who on discovering I was a teacher, instantly confirmed that for him to face a class of thirty kids he'd have to be armed with CS canisters, several stun grenades and some very beefy mates. He'd got enough on his plate with his two at home, thank you very much. Mind you, I don't think I could install a central heating system. Each to their own." - From the Introduction.