From Longman Dictionary of Contemporary Englishsixth formˈsixth form noun [countable] SESthe highest level in the British school system. Children aged between 16 and 18 stay in the sixth form for two years while they prepare to take A levels (=the highest level of school exams). —sixth former noun [countable]
Examples from the Corpus
sixth form• The former Branksome Comprehensive and Darlington sixth form college pupil is now doing a postgraduate teaching course in Birmingham.• University life had developed many of the traits Gedge first revealed while he was in the sixth form.• Remember that big sloppy jumper you knitted me when I was in the sixth form - that maroon one?• Mitosis lasted two years during the period between the pair leaving the sixth form and attending university.• The standards and ideals of the sixth form, as the Crowther Report had epitomized them, dominated the school. 