Ключевые слова: 30s, academic, basketball, black, boy, building, campus, caucasian, child, childhood, class, clipboard, coach, court, education, elementary school, exercising, expertise, female, floor, game, girl, gym, hall, holding, indoors, knowledge, male, man, mid adult, physical education, primary, profession, professional, pupil, school, schoolchild, sport, sportswear, standing, student, teacher, uniform, wood, writing,