What is an action learning set (ALS)? An ALS is a regular, action focused peer discussion group, generally facilitated, to address work place issues. Methods of undertaking ALS: methods are flexible within a range of approaches according to the group's developing needs. Benefits of ALS: builds trust, professional development, enables action, increases self-awareness and organisational thinking. Conclusion: ALS represents a workable peer group supervision format worth considering in nursing education and practice.