Participants
Students were recruited from urban Title I schools throughout the metropolitan Los Angeles area across multiple school districts. A total of 517 students participated across two cohorts in middle schools (sixth and seventh grades, ages 10–12 years) and high schools (ninth and tenth grades, ages 14–16 years) (Table 1). Program implementation for Cohort 1 (373 participants) occurred from October 2011 to May 2012, with 202 participants from six middle schools and 171 from six high schools. Program implementation for Cohort 2 (144 students) occurred from October 2012 to March 2013, with 95 participants from four middle schools and 49 from three high schools