Three years of evaluation activities were conducted by the Institute for Developmental Studies (IDS) at New York University for the 1973-1976 program years of Project Mainstream, a Title III, ESEA project in New York's Lower Hudson Region. This work was carried out with the cooperation and support of the Yonkers, New York school system. Objectives of Project Mainstream were: (1) to train both regular and special education teachers in the theory and application of behavior analysis; (2) to train teachers in specific procedures for the design of individual student curricula; (3) to re-integrate mildly handicapped special education children gradually back into regular classroom programs; (4) to plan for and guide the gradual role change of the special education teacher from a self-contained role to a resource teacher; and (5) to train and work with parents in developing and applying appropriate behavioral techniques in the home to reinforce their children's progress at school. The primary focus for the evaluation was assessment of the effectiveness of re-integrating mildly handicapped children presently enrolled in special classes into regular classrooms. The evaluation summary, recommendations, and requirements for successful project implementation are included. A sociometric rating scale form and a public opinion survey questionnaire form are also appended. (Author/MV)