Post-compulsory Secondary Education also includes the Vocational Training Institutes (IEK), which provide formal but unclassified level of education. These Institutes are not classified as an educational level, because they accept both Gymnasio (lower secondary school) and Lykeio (upper secondary school) graduates according to the relevant specializations they provide. Public higher education is divided into Universities and Technological Education Institutes (TEI). Students are admitted to these Institutes according to their performance at national level examinations taking place at the third grade of Lykeio. Additionally, students are admitted to the Hellenic Open University upon the completion of the 22 year of age by drawing lots.