Ключевые слова: adolescence, blonde hair, break time, caucasian, communication, confident, connection, corridor, education, front view, girl, hallway, happy, high school, horizontal, independent, indoors, internet, kid, knowledge, long hair, looking at screen, one person, pupil, school, school bag, schoolchild, schoolgirl, selective focus, smartphone, smiling, social networking, standing, student, technology, teenager, text messaging, using phone, waist up, wi fi,