Ключевые слова: academic, book, boy, casual, caucasian, chair, child, childhood, children, class, classmate, classroom, concentration, desk, education, educational, elementary, female, focus, girl, holding, indoor, kid, knowledge, leaning, learning, male, pencil, people, person, primary, pupil, school, schoolboy, schoolchildren, schoolgirl, selective, sitting, student, study, studying, two, writing, young,