Ключевые слова: academic, aged, alarm, asleep, blackboard, board, bored, boring, chalkboard, class, classroom, clock, college, deadline, discussing, education, elder, exhausted, explaining, fatigue, late, learning, lecture, lecturer, lesson, man, management, mentor, mentoring, missing, nap, napping, old, punctual, punctuality, school, senior, sleep, sleeping, sleepy, study, studying, teacher, teaching, time, timely, tired, tutor, tutoring, university,