Articles and books on educational testing written for specialists in the field are often inaccessible to non-specialists, whereas those written for the layperson may oversimplify or omit key concepts and issues. Testwise fills this gap by explaining these ideas at a level that is sophisticated but requires no prior knowledge of the subject. Testwise goes beyond the technical aspects of testing to explore historical and cultural themes, the roles that different stakeholders play, and possibilities for innovation.