There is little research regarding interventions for children with internalizing behaviors in schools, both within classrooms and in nonclassroom environments. In response to this need, a nonclassroom treatment package, consisting of (a) social skills instruction, (b) mediated self-management, and (c) a reinforcement system, was implemented to modify the socially withdrawn behavior of 3 elementary students. The effects of this treatment package were evaluated on the school playground--during recess--by recording both the number of communicative acts and the total time spent engaged in appropriate peer play for each target student. All target students showed marked improvement in their playground, social interaction. Future research should be conducted with similar populations, using variations of the described methods in other school settings. (Contains 1 table and 1 figure.)