Public education is generally available to all. In most countries, it is compulsory for children to attend school up to a certain age, but the option of attending private school is open to many. In the case of private schooling, schools operate independently of the state and generally defray their costs (or even make a profit) by charging students tuition fees. The funding for public schools, on the other hand, is provided by tax revenues, so that even individuals who do not attend school (or whose dependents do not attend school) help to ensure that society is educated. In poverty stricken societies, authorities are often lax on compulsory school attendance because the children there are valuable laborers. It is these same children whose income-securing labor cannot be forfeited to allow for school attendance.
In some countries, such as Germany, private associations or churches can operate schools according to their own principles, as long as they comply with certain state requirements. When these specific requirements are met, especially in the area of the school curriculum, the schools will qualify to receive state funding. They are then treated financially and for accreditation purposes as part of the public education system, even though they make decisions about hiring and school policy (not hiring atheists, for example), which the state might not make itself.
Proponents of public education assert it to be necessary because of the need in modern society for people who are capable of reading, writing, and doing basic mathematics. However, some libertarians argue that education is best left to the private sector; in addition, advocates of alternative forms of education such as un schooling argue that these same skills can be achieved without subjecting children to state-run compulsory schooling. In most industrialized countries, these views are distinctly in the minority.