David Weston is the founder and Chief Executive of the Teacher Development Trust, the national charity for effective professional development. He is Chair of the Department for Education’s Teachers’ Professional Development Expert Group and, alongside Bridget Clay, wrote Unleashing Great Teaching: the secrets to the most effective teacher development. David taught maths and physics for ten years in two schools in London and the South East. He is a Founding Fellow of the Chartered College of Teaching. David speaks and writes frequently for the education sector and national media and has had a number of radio and TV appearances on the subject of teaching, teacher development and LGBT issues.