There are two routes to becoming a Headteacher.
1) Train as a teacher and enthusiastically adopt every policy dreamt up by those above you; no matter how insane. Fill out every form that comes your way and nod your head frequently during Staff Meetings. Work your way up to Head of Department, keep crawling and agreeing with the SMT, go on endless useless courses and above all, do not stick your neck out supporting anyone with silly old fashioned ideas such as making pupils behave themselves.
Now apply for Deputy Head and be extra vigilant in not supporting anyone below you no matter what. Pepper your speech with the buzzwords of the day and dream up as many ludicrous ideas as you can. Do not rock the boat, upset any parents or accidently expel anyone. Just keep agreeing with the Head and finally apply for position of Headteacher. Bingo!
2) Buy the school