The answer depends to some extent on the work-setting you have in mind. In Ripples, leading groupworkers introduce you to eleven applications. Assuming little prior knowledge, each tells you of the clients'/users' needs, the methods used and the ideas that guide workers in one setting. Further reading is suggested. Initiated by the interdisciplinary journal Groupwork, Ripples invites workers to learn form one another, in the belief that the ripples of shared learning can only strengthen groupwork practice. The settings include: personal growth, palliative care, occupational therapy, criminal justice, social work, mental health, health promotion, schools, community-based learning for adults, community development and social action.