Ключевые слова: 52274, adolescent, back to school, boy, braces, break, casual attire, caucasian, chat, cheerful, classmates, dental, device, dhai, digital age, dream, education, education system, educational institution, happy, health, indoors, knowledge, look at camera, message, mobile phone, networking, people, phone, rest, school, school hallway, schoolboy, schoolgirls, schoolmates, smartphone, smile, social media, stand, student, student life, technology, teen, teenager, youth culture,