Ключевые слова: back, background, black, blackboard, board, book, boy, caucasian, chalk, chalkboard, child, childhood, class, classroom, concept, cute, education, hands, happy, heap, holding, homework, human, kid, knowledge, learning, lesson, literary, literature, little, male, modern, people, person, pile, school, schoolboy, schoolchildren, schoolkid, smile, stack, student, study, teaching, teen, teenager, textbook, white, young, youth,