This publication provides policy guidance in an area that has been given little policy priority until recent years. It brings together key lessons from 17 OECD countries, providing evidence on the strategies in place to improve adults’ participation in learning. It addresses potential barriers to learning as well as the policies to remedy them. Among these are policies for increasing and promoting the benefits of adult learning to make them transparent and easily recognised. Other policy levers include economic incentives and co-financing mechanisms that can raise the efficiency of adult learning provision, while delivering quality learning that is adapted to adults’ needs. Finally, policy making can be improved via co-ordination and coherence in a field that is characterised by a wide variety of stakeholders, including ministries of education and ministries of labour.