Ключевые слова: 1, back, background, blackboard, boy, caucasian, chatting, child, childhood, children, class, classmates, color, cute, day, education, elementary, exercise, girl, group, growth, hall, happy, indoors, kid, knowledge, learn, learning, lesson, little, people, person, portrait, pupils, school, schoolchild, september, smiling, study, studying, subject, talking, task, time, uniform,