Ключевые слова: boy, call, caucasian, child, class, classroom, college, communication, communication technology, composite, composite image, computer, digital, digital composite, display, education, hand, image, internet, learn, learning, lesson, male, mobile, monitor, one person, online, online education, onlinecourses, people, raising, raising hand, school, screen, student, study, studying, teacher, technology, video, video call, videoconference,