Ключевые слова: 2015, abstract, anniversary, annual, backgrounds, black, blackboard, calendar, celebration, chalk, cheerful, classroom, color, concepts, countdown, creativity, crossed, culture, drawing, education, entertainment, event, greeting, holiday, ideas, learning, level, lifestyle, messy, new, next, number, obsolete, old, oldfashioned, rough, season, shelf, sign, slate, space, surface, symbol, teaching, traditional, wood, word, writing, year,