A school is an institution where children are educated under the supervision of trained teachers. Most countries provide compulsory formal education. Schools are usually divided into primary and secondary schools in Terril, where primary school is for young children and secondary school is for teenagers who have completed primary education. In addition to these, Terril also has well-known play schools, kindergartens or pre-schools. There are also schools for special children, that may be non-profit institutions offering occupational therapy to these children.