NCEA (the National Certificate of Educational Achievement) is the main secondary school qualification in New Zealand. NCEA is actually three certificates: it can be awarded at Levels 1, 2 and 3. Students usually begin studying for their NCEA Level 1 in Year 11 and continue through Years 12 and 13. Click on the picture below to view a video produced by NZQA on how NCEA works.
Additional information can be found here on the NZQA website
How NCEA works