Shirley Clarke (Author) Shirley Clarke is an assessment consultant and trainer who is highly regarded by classroom teachers for her down-to-earth, practical approach to formative assessment, as well as a hugely successful author with an international reputation. A former classroom teacher and advisory teacher, she is a popular speaker who is much in demand. Her courses and training days for teachers, and ongoing involvement in classroom research, give her both credibility and a down-to-earth perspective on day-to-day classroom realities. She was awarded an honorary doctorate by the University of Greenwich in 2007. Helen Timperley (Author) Dr. Helen Timperley is Professor Emeritus of Education at The University of Auckland. Her extensive research experience has focused on how to promote professional and leadership learning in schools in ways that make a difference to outcomes for those student learners who are currently underserved by the system. She has numerous research articles in both these areas published in international journals, has spoken at a range of invited seminars and undertaken consultancies in Europe, Canada and Australia. She has written six books on her specialty research areas with many translated into a range of languages. Most of her published and consultancy work has focused on school and system change through professional learning, professional conversations with impact and evaluative thinking in educational innovation. John Hattie (Author) John Hattie is Professor and Director of the Melbourne Education Research Institute at the University of Melbourne, Australia and honorary Professor at the University of Auckland, New Zealand. He is the author of Visible Learning and co-author of Intelligence and Intelligence Testing, both published by Routledge.