The Association of Christian Schools International (ACSI) is a nonprofit international organization of Christian schools, with its headquarters in Colorado Springs, USA. It was formed in 1978 as a result of the merger of several Christian school associations in the United States and Canada. It has more than 25,000 member schools in over 115 countries, serving more than 5.5 million students. There are 16 regional offices around the world, each of which respects the cultural identity of its respective country.