The main task of the Working Group on Adult Learning of the INES Labour Market, Economic and Social Outcomes network is the development of indicators on Adult Learning for publication in the annual volume "Education at a Glance" of the OECD. As part of this task, a list of 18 policy goals/issues in the domain of adult learning have been identified through broad consultations. After identifying the policy goals a theoretical framework was developed in order to be able to systematically select indicators for monitoring them. The theoretical framework is based on a systemic approach, identifying context, input, processes, output and outcome of the system of Adult Learning. The policy goals to be monitored and the theoretical framework constitute the basis for the definition and selection of a list of indicators which might be published in EAG. The third element in the development of international indicators is the existence of comparable data of good quality. The paper includes a list of 44 indicators which are practical to publish with existing data sources or with data sources likely to become available in the near future. The coverage of the policy areas is uneven, reflecting both the focus of existing data sources and the difficulties of some data gathering exercises.