Ключевые слова: academic, blackboard, board, book, books, chalkboard, cheerful, class, classroom, college, course, discussing, education, exam, excited, explaining, graduation, green, happy, high, knowledge, learn, learning, lecture, lecturer, lesson, man, mentor, mentoring, old, pile, preparation, preparing, reading, revising, school, science, senior, student, study, studying, teacher, teaching, textbook, textbooks, trainee, training, tutor, tutoring, university,