Ключевые слова: board, book, books, chalkboard, class, classroom, college, course, demonstrating, development, discussing, earth, education, educational, exam, explaining, geographer, geographical, geography, globe, high, holding, learn, learning, lecture, lecturer, lesson, library, man, map, pointing, presenting, primary, reading, school, science, showing, student, study, studying, teacher, teaching, textbook, textbooks, training, tutor, tutoring, university, whiteboard, world,