Pre-school is often the term used to refer to child care centers that care primarily for 3 and 4-year-old children. Preschool can be based in a center, family child care home or a public school. Older children, in their turn, in most countries are cared in an educational setting, usually a primary school environment. The children are supervised by a teacher all day long, who is responsible for their physical, intellectual, emotional and social development. In this regard, most western countries have compulsory education during which the great majority of children are at school starting from five or six years of age. The school will act "in loco parentis" meaning "in lieu of parent supervision." In many locales, government is responsible for monitoring the quality of care.