Ключевые слова: 1213 years, 1415 years, academic, adolescence, back to school, book, bookshelf, boy, boys, browsing, casual clothing, caucasian, caucasian ethnicity, cell phone, child, classmate, communication, connection, development, education, female, four people, girl, girls, high school, holding, information, intelligence, intelligent, knowledge, learn, learning, leisure, library, lifestyle, male, mixedrace, mixedrace person, mobile phone, modern, school, schoolboy, schoolgirl, secondary, sitting, smartphone, student, study, studying, teenage, teenage boys, teenage girls, teenager, touch screen, using, web, wireless technology, wisdom, youth,