Education in Turkey is governed by a national system which was established in accordance with the Atatürk's Reforms. It is a state-supervised system designed to produce a skillful professional class for the social and economic institutes of the nation. Higher education includes all levels of institutions. Universities provide either two or four years of education for undergraduate studies, while graduate programs last a minimum of two years. Some universities also ask for an additional year of English preparatory study to be completed before the start of studies, unless an exemption examination is passed.