Ключевые слова: academic, amplifier, angry, blackboard, board, book, bullhorn, chalkboard, class, classroom, college, discussing, education, educational, explaining, funny, girl, green, horn, knowledge, lazy, learn, learning, lecture, lecturer, lesson, loudspeaker, man, megaphone, poor, progress, pupil, reading, school, screaming, shouting, strict, student, study, studying, teacher, teaching, textbook, trainee, training, tutor, tutoring, university, woman, yelling,