This work should serve as a sound foundation for students and practitioners as they begin their study of the significance of various groups in social work practice. —Choice Collective problem solving: a powerful and effective means of assessing a situation, determining a course of action, and accomplishing goals. In the realm of social services, this formidable method has been evidenced in the development of task groups; in the textbook arena, it is clearly and definitively presented in Task Groups in the Social Services. Focusing on the role of the social worker, the authors consider such aspects as the recruitment and composition of groups, participation as a team member, group shepherding, and dealing with problem behaviors within the group. Selected problem-solving approaches, including brainstorming, societal judgment analysis, and the Delphi technique, are evaluated in terms of process and outcome. From implementation through achievement, the merits and methods of application for a variety of task groups are assessed. This sophisticated work will be a vital resource for students of social work and social work practitioners alike.