This article explores the Department of Education's programme of co-operation and rationalisation within the Irish post-primary school sector during the period 1966–70. Through a systematic analysis of government files and private convent archival collections, especially those of the Presentation Sisters, combined with oral history interviews, this study provides a unique insight into how co-operation and rationalisation in the post-primary sector were reconciled at ground level. It exposes the previously hidden history of voluntary secondary school authorities and the role they played in educational reform during the 1960s and explores how individual school authorities received, responded to and reacted to this new government initiative. To a large extent, the success of co-operation and rationalisation depended on the willingness of school authorities to accept and comply with departmental directives. This study, thus, expands understandings of the history of the Irish education system in general and of the reform period (c.1957‒72) in particular.
