Ключевые слова: advertisement, advertising, alphabet, art, back, background, black, blackboard, blank, board, chalk, chalkboard, class, classroom, communication, concept, copy, creativity, design, drawing, dust, education, element, empty, frame, front, grunge, horizontal, isolated, learning, message, montage, old, pattern, rough, school, space, student, surface, symbol, table, teacher, text, texture, textured, view, wall, wallpaper, wooden, writing,