The 1979 revolution continued the country's emphasis on education with the new government putting its own stamp on the process. The most important change was the Islamization of the education system. All students were segregated by sex. In 1980, the Cultural Revolution Committee was formed to oversee the institution of Islamic values in education. An arm of the committee, the Center for Textbooks (composed mainly of clerics), produced 3,000 new college-level textbooks reflecting Islamic views by 1983. Teaching materials based on Islam were introduced into the primary grades within six months of the revolution.