In the PPC structure, school becomes a cooperative learning experience in which assignments are a form of collective accountability. Cooperative learning structures are used for all that involve problem-solving skills; they instill a sense of self-esteem and interpersonal relations. While competitive learning structures may be used with drill activities or speed-related tasks, in general, the fear of failure or ridicule can harm a youth who is already troubled or experiencing behavioral problems. Furthermore, for troubled youth, social skills learning occurs most effectively within heterogeneous groups. Twenty-five administrators, members of the National Association of Peer Group Agencies, responded to a survey about PPC programs, indicating potential misuses of PPC methodology and uses a pre- and post-affective behavior testing. There was a recognition among the respondents of a need to collect hard behavioral data to assess a student's progress toward or failure to achieve increased self-esteem and positive behavior modification. 1 table, 1 figure, and 23 references (Author abstract modified)