In the United Kingdom, the term "sixth form" refers to the final two years of secondary education, typically for students aged 16 to 18. It is not compulsory, but it is a common route for students preparing for university entrance. During sixth form, students can study A levels, International Baccalaureate exams, and sometimes vocational qualifications. The sixth form can be found in both state schools and private schools, and it is an important stage for students to prepare for higher education and their future careers. The term "sixth form" is used in England, Northern Ireland, Wales, and some other Commonwealth countries, and it is equivalent to the final years of high school in the United States.