Ключевые слова: 6 7, blackboard, book, boys, caucasian, child, childhood, children, classroom, close up, color, culture, desk, education, elementary, ethnicity, girls, group, head, human, image, in, indoors, industry, intelligence, kids, learning, letter, lifestyle, listening, little, pencil, people, person, portrait, preschool, reading, school, schoolgirl, sitting, smiling, studying, teaching, technology, textbook, togetherness, writing, youth,