Ключевые слова: beard, blackboard, class, classroom, college, education, elementary school, encouragement, front view, happy, horizontal, in indoor, intelligence, job, knowledge, learning, looking at the camera, man, men, one person, online, people, personality, portrait, positive, profession, professor, role model, school, smile, smiling, standing, student, study, teacher, teaching, university, waisthigh, work,