 The Families and Schools for Health FiSH Project evaluates a psychosocial intervention that targets the family and peer contexts of overweight children. 23 rural schools were identified for participation schools within a 90-mile radius of the PIs campus were targeted and each was assigned to one of five intervention conditions using stratified random sampling, with stratification based on proximity to each other to avoid spill-over effects and proportion of Native American Indian students. A community sample of 1186 1st grade children, their families, and their teachers were successfully recruited. Anthropometric assessments were conducted with the 1186 children. Those who were not at Control schools were invited to participate in the intervention. 541 children qualified for the intervention i.e., had BMI 75, including 459 at Intervention schools and 82 at Control schools. Intervention conditions were 1 a 12-week Family Food Lifestyle intervention FL, aimed at improving family nutritional intake, activity levels, weight perception, and parental monitoring of child eating; 2 a 12-week Family Food Lifestyle and Family Dynamics intervention FLFD that additionally targets dysfunctional family patterns such as high conflict, poor parent-child communication, and parental over-control or permissiveness; and 3 a Peer Group PG intervention conducted throughout one semester of the school year that includes a guidance-type curriculum sensitizing children to the importance of social inclusion of all children. Thus, 5 treatment groups were evaluated in the intervention year and followed through 4th grade: FL, FLFD, FLPG, FLFDPG, and Control. Child psychosocial variables such as emotional eating, self-esteem, loneliness, and social withdrawal will be analyzed as mediators between familypeer contexts and child overweight. 