Ключевые слова: advertising, background, billboard, black, blackboard, blank, board, border, brick, chalk, chalkboard, class, classroom, communication, concept, copy, copyspace, design, dirty, drawing, education, empty, frame, front, grunge, handwriting, illustration, learning, material, message, notice, old, pattern, retro, school, space, student, study, studying, surface, text, texture, university, vintage, wall, wooden, write,