Ключевые слова: back to school, caucasian boy, caucasian girls, caucasian woman, childhood, children, class, classroom, closeup, cropped, digital device, education, educational, electronic, european, friends, gadget, hands, hold, indoors, kids, knowledge, learn, lesson, people, photograph, photographing, preadolescent, preteen, professional occupation, schoolboy, schoolchildren, schoolgirls, schooling, schoolkids, selective focus, smartphone, study, teach, teacher, together, tuition, use, young adult,