Ключевые слова: back to school, backgrounds, book, bookshelf, campus, chalkboard visual aid, classroom, closeup, conceptual symbol, copy space, desk, document, education, educational subject, expertise, hardcover book, home office, indoors, knowledge is power, law, learning, library, literature, motivation, no people, old, open, page, paper, paperwork, patience, preparation, printed media, reading, red, research, retro style, science, slogan, stack, studying, success, table, teaching, text, textbook, textured, university, wisdom, yellow,