The speed and extent of modern school accountability have obscured the history of testing and accountability. This brief introduction identifies central themes of historical research into educational accountability and recurring traits associated with accountability practices. We hope our colleagues and this special issue will also help to identify future research paths in this field. Some of the central themes found in the historical research on educational accountability contained in this special issue are the connections between accountability and the purposes of schooling in a specific time and place, the relationships between school accountability structures and the state, as well as accountability as a cultural phenomenon. One of the recurring traits found in accountability practices is the role of accountability as a phenomenon that cannot be epaa aape