Ключевые слова: adolescence, adolescent, asian, back, blackboard, boys, chalkboard, child, china, chinese, class, classmates, classroom, closeup, course, crowd, desk, diligence, education, exam, female, girls, group, high school, highschool, indoors, knowledge, learning, lesson, male, middle school, pen, pupil, rear view, school, sitting, studying, teenage, teenagers, teens, together, trainee, training, tuition, young, youth,