The current study examined the effects of the Class-wide Function-related Intervention Teams (CW-FIT), a class-wide group contingency, on the on-task behavior of all students in a first grade class and the on-task and disruptive behavior of three target students within that class who were nominated by their teacher through a behavioral screening. The classroom teacher used a systematic instruction model (i.e., direct instruction, model, and role-play) to teach three behavioral skills, including (a) gaining the teacher's attention appropriately, (b) following directions, and (c) ignoring inappropriate peer behavior. These skills were reinforced through use of an interdependent group contingency, the CW-FIT program, incorporating class teams, awarding points, and rewards for meeting point goals. The effects of the intervention on target student and class behavior were evaluated in a reversal design. Results showed the CW-FIT program was effective in increasing the on-task behavior of the class and target students. A reduction in disruptive behavior was also seen for each target student during intervention. Students and teacher reported a high degree of satisfaction with the intervention.