Christopher Day is Professor Emeritus at the School of Education in the University of Nottingham, UK.Pam Sammons is a Professor of Education at the Department of Education, University of Oxford and a Senior Research Fellow of Jesus College, Oxford, UK.Ken Leithwood is Professor Emeritus of Educational Leadership and Policy at OISE/University of Toronto, Canada.David Hopkins is Professor Emeritus at the Institute of Education, University of London, UK.Qing Gu, is an Associate Professor in the School of Education, University of Nottingham, UK.Eleanor J. Brown is a Research Associate and PhD student in the School of Education, University of Nottingham, UK.Elpida Ahtaridou is a Principal… Researcher at LSN.