Ключевые слова: advertising, announcement, background, billboard, board, break, chalk, chalkboard, childhood, children, class, classroom, draw, education, end, escape, fun, green, greenboard, holiday, holidays, idea, learn, leisure, lesson, message, mid, object, relax, rest, school, season, stationery, student, study, summer, surface, table, teach, term, text, vacation, year,