A democratic state wants equality of educational chances for all children. The guarantee for equality of education is given in the responsibility of the public school system all children have to attend, private schools can only exist in exactly determined exceptions. In opposition to this democratic principle is the liberal idea interested in a free market of offers of educational institutions (which cost school fee, not all parents can pay), here is the public school system in competition with all other tenders. It is very clear that the liberal idea hurts the iideal of equality, because it gives parents the right to decide which school, public or private, their child should attend as the best for the child's career. The systems of school are very different in the world, in the German tradition the stately-public school dominated private schools by far, but the latter get increasing numbers of students.