participation (2) Development (2) Context (2) Variation (2) Teenagers (2) Student activities (2) Sex differences (2) Participation (2) Males (2) Life (2) Females (2) Average (2) Attitudes (2) Sex differences (2) Gender (2) adolescent (2) jeunesse (1) Youth (1) Orientation (1) Academic achievement (1) Youth (1) Orientation (1) Identidad (1) identité (1)