Thousands of teenagers in Auckland, Northland and parts of Waikato are skipping their NCEA exams. They are making the most of a new rule that means they will get an unexpected-event grade for any exams they miss, no questions asked. In the first four days of exams average attendance in the three regions was 55% and this week some schools are reporting rates as low as 15% Our education correspondent John Gerritsen has been talking to principals about what's going on.