In this study from the Journal of Youth and Adolescence, researchers examine how the breadth of activities in which an adolescent participates relates to academic outcomes. The sample included more than 800 ethnically diverse 11th grade (Year 12 pupils). The researchers looked at the relationships between these pupils’ participation in four activity domains (academic/leadership groups, arts activities, clubs, and sports) and their sense of belonging at school, academic engagement, and academic achievement.
Results showed that adolescents who were moderately involved (ie, in two domains) reported a greater sense of belonging at school in both Year 12 and Year 13, a higher grade point average in Year 12 and greater academic engagement in Year 13, relative to those who were more or less involved.
Source: Too much of a good thing? How breadth of extracurricular participation relates to school-related affect and academic outcomes during adolescence (2011), Journal of Youth and Adolescence, 41(3)