This module is part of a training program for foster parents and foster care workers offered at Colorado State University. The module's learning objectives address: (1) the organization of a social services foster care system; (2) the functioning of human systems and the rules governing their operation; and (3) the difficulties complex systems have in responding to clients' needs. This module consists of two lectures. Lecture 1 considers the three domains of the foster care system. These domains are the family system; foster care services; and agencies or institutions such as the police and courts that perform related services for families. An exercise for sketching a simple child placement sequence is included. Lecture 2 considers the law of parallel process, which says that feelings that dominate one level of a system affect other levels. A vignette exercise allows course participants to practice their skills relating to intervention in family systems. A five-page form for evaluating the module is included. (BC)