In Years 11 to 13, students complete the National Certificate of Educational Achievement (NCEA), the main secondary school qualification in New Zealand. Levels 1, 2 and 3 of NCEA are usually completed in years 11, 12 and 13 respectively, although students can choose subjects from different levels depending on their progress through the NCEA level system. Students study six subjects per year (five in Year 13), with English being compulsory in Years 11 and 12, and Mathematics and Science being compulsory in Year 11.