The report is the third in a six part research report. The construction and evaluation of a treatment model using short term placement in a token economy to modify deviant behavior is described. Between 1968 and 1970 the treatment model was replicated on a total of 44 subjects ranging in age from 8 to 12 years. Eight groups of six subjects each were rotated through the experimental classroom for a 2 month period of treatment. Three components of the treatment model - token reinforcement, social reinforcement, and aversive controls, were evaluated in terms of their efficiency in accounting for behavior change. Results were felt to indicate that social reinforcement had the greatest control over the subjects' behavior. Application of the treatment model over a 2 year period was felt to produce measurable changes in classroom behavior and in measured achievement in math and reading. Other aspects of the project are included in: section one (EC 032 208) overview; section two (EC 032 209) assessment; section four (EC 032211) generalization and maintenance; section five (EC 032 212) teacher behavior; and section six (EC 032 213) single subject experiments. (CD)