Ключевые слова: academic, back, bag, board, book, books, briefcase, case, class, classroom, college, course, desk, discussing, education, educational, explaining, graduate, graduation, high, knowledge, learn, learning, lecture, lecturer, lesson, man, mentor, mentoring, opening, physicist, physics, reading, school, science, student, study, studying, teacher, teaching, textbook, textbooks, training, tutor, tutoring, university, white, whiteboard, young,