In the United Kingdom, independent schools are fee-charging schools, some endowed and governed by a board of governors and some in private ownership. They are independent of many of the regulations and conditions that apply to state-funded schools. For example, pupils do not have to follow the National Curriculum, although, some schools do. They are commonly described as 'private schools' although historically the term referred to a school in private ownership, in contrast to an endowed school subject to a trust or of charitable status. Many of the older independent schools catering for the 13–18 age range in England and Wales are known as public schools, seven of which were the subject of the Public Schools Act 1868. The term "public school" derived from the fact that they were then open