Ключевые слова: background, backpack, bag, book, books, cellphone, child, class, classmate, college, communication, contact, copyspace, device, education, elementary, female, friend, gadget, girl, glasses, isolated, kid, knowledge, learn, mobile, notebook, parents, people, person, phone, portrait, school, schoolbook, schoolgirl, sitting, smartphone, student, studio, study, talking, teaching, technology, teenage, teenager, textbook, tuition, user, white,