The average age must 50 I would say. Our head is a good bit younger early 30s and only four years classroom experience. I am 49 but came into teaching only 12 years ago and worked in completely unrelated area of life. So working full time 28 years. Proud of my working life no thoughts of retirement - no way could I afford to etc All I can say is management of a school requires someone with a vast wealth of experience, dedication, love of children, an open mind and good communication skills. Best head I ever worked with was 45 years in the classroom, a skilled diplomat (she should have been an ambassador with the UN), wicked sense of humour, humane and never lost the drive to improve her skills as a classroom practitioner or to encourage us. She is still teaching (adults) in her retirement and has subbed for the primary school too. A class act. So age...only worries those who feel threatened by it in someway they don't know what they are missing.