Ключевые слова: academy, auditorium, back, background, blackboard, blank, board, book, chalk, chalkboard, class, classroom, college, concept, desk, educate, education, elementary, empty, equipment, green, homework, knowledge, learn, library, literature, notebook, office, pencil, pile, piled, school, science, stack, stacked, student, study, studying, supplies, table, textbook, university, wisdom, workbooks,