The "Does Religious Education work?" project is part of the Religion and Society programme funded by two major research councils in the UK. It sets out to track the trajectory of Religious Education (RE) in secondary schools in the UK from the aims and intentions represented in policy through its enactment in classroom practice to the estimations of its impact by students. Using a combination of approaches, we are in the process of investigating the practices which determine and shape the teaching of RE in secondary schools through linked case studies, semi-structured interviews and a practitioner enquiry strand. In this article we focus on the first stage of the project where we used the Delphi method to elicit expert opinion on the aims and intentions of RE in secondary schools in Scotland, England and Northern Ireland. We outline the place of the Delphi process within the rationale of the project, discuss emerging themes and some of the issues arising from the use of this approach. (Contains 1 note, 3 tables, and 1 figure.)