entry into the workplace. In 2012 the ISCED published further work on education levels where it codified particular paths and redefined the tertiary levels. Lower secondary education and (upper) secondary education could last between 2 and 5 years, and the transition between two often would be when students were allowed some subject choice. Terminology for secondary schools varies by country, and the exact meaning of any of these varies. Secondary schools may also be called academies, colleges, gymnasiums, high schools, lyceums, middle schools, preparatory schools, sixth-form colleges, upper schools, or vocational schools, among other names. For further information about nomenclature, see the section below by country. History A form of education for adolescents became necessary in all societies that had an alphabet and engaged in commerce. In Western Europe, formal secondary education can be traced back to the Athenian educational reforms of 320BC. Though their civilisation was eclipsed and they were enslaved, Hellenistic Athenian teachers were valued in the Roman system. The Roman and Hellenistic schools of rhetoric taught the seven liberal arts and sciences – grammar, rhetoric, logic, arithmetic, geometry, music and astronomy – which were regarded as a preparation for the study at a tertiary level of theology, law and medicine. Boys would have been prepared to enter these schools by private tutors at home. Girls would have only received tuition at home. England provides a good case study. When Augustine of Canterbury brought Christianity there in 597, no schools existed. He needed trained priests to conduct church services and boys to sing in the choir. He had to create both the grammar schools that taught Latin, to enable the English to study for the priesthood, and song schools (choir schools) that trained the 'sons of gentlefolk' to sing in cathedral choirs. In the case of Canterbury (597) and Rochester (604), both still exist. Bede in his Ecclesiastical history (732) tells that the Canterbury school taught more than the 'intended reading and understanding of Latin', but 'the rules of metric, astronomy and the computus as well as the works of the saints' Even at this stage, there was tension, as the church was worried that knowledge of Latin would give the student access to non-Christian texts that it would not wish them to read. Over the centuries leading to the renaissance and reformation the church was the main provider of secondary education. Various invasions and schisms within the