Ключевые слова: apartment, book, boy, caucasian, child, childhood, closeup, cognition, concentration, desk, education, elementary, exhausted, face, head, holding, home, homework, indoor, kid, learning, lesson, lifestyle, looking, looking away, male, notebook, overworked, pensive, person, portrait, problem, pupil, room, school, schoolboy, schoolkid, sitting, sleepy, smart, stress, student, studying, table, teenage, textbook, thinking, tired, young,