Ключевые слова: 1216, activity, afroamerican, american, boy, break, casual, caucasian, cheerful, children, class, classroom, communication, confident, contact, different, education, elementary, ethnicity, few, friends, friendship, fun, gesture, girl, group, happy, indoor, joy, junior, kids, laugh, lesson, mixed, multiethnic, networking, people, pupil, school, sitting, smiling, social, students, studying, talking, teenage, together, youth,