Ключевые слова: advert, advertisement, advertising, announcement, billboard, black, blackboard, blank, board, business, chalk, chalkboard, class, classroom, communication, concept, copy, copyspace, design, dirty, drawing, education, frame, information, label, learning, magnet, magnetic, memo, message, note, notebook, office, paper, plan, post, primary, reminder, school, scratch, sheet, sign, space, square, sticker, sticky, study, text, white, wooden,