Ключевые слова: academic, blackboard, board, book, books, chalkboard, class, classroom, clock, deadline, discussing, education, explaining, frustrated, green, hourglass, late, learning, lecture, lecturer, lesson, man, management, mentor, mentoring, missing, punctual, punctuality, reading, sand, sandglass, school, stressed, student, study, studying, teacher, teaching, textbook, textbooks, time, timer, trainee, training, tutor, tutoring, unhappy, university,