Ключевые слова: academic, adult, aged, aged elderly, blackboard, caucasian, chalkboard, class, classroom, college, concept, copy space, education, education school, empty, expert, grandfather, grey hair, handsome, indoor, intelligent, knowledge, learn lesson, learning, lecture, lecturer, lesson, man, mature adult, mentor, occupation, old, old senior, oldage, professor, school, science, seminar, senior, senior professor, study, studying, suit, teach, teacher, teacher class, teaching, traditional, tutor, tutor study,