Ключевые слова: ad, advert, advertisement, advertising, backdrop, background, billboard, black, blackboard, blank, class, classroom, close, communication, concept, copy, copyspace, dirty, draw, drawing, education, empty, frame, grunge, grungy, handwriting, learn, learning, lesson, message, note, panel, school, sign, space, student, symbol, teach, teacher, teaching, text, texture, textured, up, used, vignette, weathered, white, write,