Ключевые слова: book, boy, calculator, casual, caucasian, child, childhood, class, classroom, college, communication, concept, desk, education, elementary, exam, homework, indoor, knowledge, learn, lesson, lifestyle, little, male, man, math, notebook, paper, pen, person, problem, pupil, read, room, school, schoolboy, science, sitting, standardized, student, studying, table, teaching, teenager, test, university, using, white, write, young,