Ключевые слова: advert, background, black, blackboard, board, burnt, chalk, chalkboard, classroom, closeup, color, copy space, copyspace, design, drawing, duster, education, element, erase, frame, green, horizontal, learning, nobody, old, rag, rubbed, school, scrapbook, sign, student, surface, symbol, texture, used, vintage, wall, wet, wipe off,