Ключевые слова: alarm, back, background, blackboard, book, books, chalk, chalkboard, class, classroom, clock, college, compass, concept, design, desk, educate, education, elementary, glass, green, homework, knowledge, learn, letters, library, literature, magnifying, nobody, notebook, numbers, old, pen, retro, school, signs, study, studying, table, textbook, textbooks, texture, time, university, vintage, white, wood,