The Differentiated Child Behavior (DCB) Observational System has a two-fold purpose: first, it provides a description and analysis of patterns of classroom interactions in educational programs and program impact on children's functioning; and second, it provides feedback to supervisory staff so that analysis of programs contributes to implementation of the in-service teacher training program. Findings in initial studies indicate the instruments are sensitive and appropriate to open as well as traditional classrooms. Data has revealed significant differences among groups in predicted directions, and findings seem to pinpoint factors contributing to these differences. (Author)