Ключевые слова: adolescent, blur, boyhood, boys, caucasian, cheerful, children, classmates, classroom, education, emotion, erase board, eyeglasses, girlhood, girls, happy, indoors, job, lesson, man, mature, middle aged, notebook, people, positive, profession, pupils, school, schoolboys, schoolgirls, smiling, teacher, teen, teenagers, together, workplace,