Ключевые слова: academic, aged, asking, back, blackboard, board, books, chalkboard, class, classroom, college, course, demonstrating, discussing, education, elder, exam, explaining, graduation, green, high, learning, lecture, lecturer, lesson, man, mentor, mentoring, notes, old, papers, pile, pointing, presenting, questioning, school, science, senior, showing, strict, study, studying, teacher, teaching, textbooks, to, training, tutor, tutoring, university,