Ключевые слова: above, advertisement, advertising, background, black, blackboard, board, chalk, chalkboard, childhood, closeup, colorful, communication, concept, desk, dirty, drawing, education, frame, green, learn, learning, lesson, lumber, message, note, office, old, plank, rustic, school, study, table, teach, teaching, text, texture, top, used, wood, wooden, write,