Development (1) Year (1) Teachers (1) Sports records (1) Perception (1) Parents (1) Morale (1) Longitudinal method (1) Gender (Musical instrument) (1) Discussion (1) Athletic ability (1) Ability (1) Cover versions (1) Management (1) Yields (1) Sexual behavior (1) Relations (1) Students (1) Costumbres sexuales (1) Sexualidad (1) Profesores (1) Performance-art (1) Perception (1) Gendèr (1) Reprises de chansons (1) Parents (1) Savoir-faire (1) Compétence (1) Moral (1) Performance (sports) (1)