“It depends on the teacher’s expertise.” John Hattie in dialogue with Klaus Zierer

Visible Learning comprises the largest data set of empirical educational research ever evaluated in a book. It has been translated into several languages and is undoubtedly one of the most influential studies in educational science. Our experience has shown that an interview on central questions is helpful in getting an introduction to the core statements of this work. This is why we begin this book with a conversation.