Shaun Allison leads on CPD in his school and is interested in supporting teachers to grow and develop their classroom practice. He is the author of the widely acclaimed Perfect Teacher-Led CPD and a popular speaker. Shaun's background is in science teaching and he is currently deputy head teacher at Durrington High School.Andy Tharby, a practising English teacher, is a research lead with an interest in helping ordinary classroom teachers enhance their practice through engagement with a wider evidence base. His well-regarded blog, Reflecting English, covers a range of subjects from improving student writing to finding solutions to the problems and dilemmas faced by busy teachers.