Ключевые слова: abstract, advertising, all, backdrop, background, billboard, blackboard, board, border, chalk, chalkboard, class, classroom, college, communication, composition, concept, copy, design, drawing, education, element, female, flat, formula, frame, graphic, green, hand, learn, letter, menu, message, note, pattern, school, set, sign, stationery, student, study, symbol, teaching, text, texture, top, wallpaper, woman, write,