Ключевые слова: ad, advert, advertising, announcement, backdrop, background, billboard, black, blackboard, blank, board, chalk, chalkboard, class, classroom, college, communication, copy, dirty, distressed, drawing, dust, educate, education, empty, frame, grey, grunge, grungy, handwriting, learning, message, note, notice, old, school, scratched, sign, smudged, space, studying, surface, teach, text, texture, university, vintage, wall, white, write,