Entitled Project Success Environment and funded by Elementary Secondary Education Act Title III, the pilot 1970-71 study included eight experimental classes with appropriate comparison classes. Following this initial effort the program was expanded to include twice the number of students within a wider age range during the second year of operation 1971-72. A reasonably rigorous experimental design was also incorporated in the second year. The projects' purpose was to answer an actuarial question: Can behavior modification solve the referring social problem, which has been analyzed into two sets of behavior, those behaviors which are too high or too low in rate? The central question in this study is whether or not teachers can be trained to use the techniques made available through behavioral analysis to provide large number of students from economically disadvantaged backgrounds with some modicum of individual success. The emphasis has been on the training preservice and inservice) of teachers in the use of positive behavior modification. A contingency management technique was implemented in a large number of inner-city classrooms from first to eighth grade for an entire academic year. Further, some children participated in the project for two successive years, thus permitting some assessment of the longitudinal effects. (Author/JM)