Ключевые слова: boy, bts, caucasian, child, childhood, classroom, desk, development, education, elementary age, elementary school, elementary student, indoors, kid, knowledgeforall, learn, lesson, mobile phone, note, notebook, online, pupil, school, school building, school children, schoolboy, schoolchildren, smartphone, student, study, table, technology, underachiever, video, watch, wireless, write, write off,