Ключевые слова: academic, book, boy, caucasian, child, childhood, class, classmate, classmates, classroom, concentration, concept, desk, education, elementary, focus, girl, group, indoors, journal, kid, kids, knowledge, learn, learning, lesson, little, pencil, people, preteen, primary, pupil, room, row, school, schoolboy, schoolchildren, schoolgirl, sitting, solving, student, students, study, studying, test, textbook, time, together, writing, young,