Snowskool run an 11-week ski and snowboard (NZSIA/SBINZ) Instructor course at Cardrona, using Cardrona ITC instructors for all course tuition. There are limited spaces left on both courses so if you are interested you can check out more information by clicking on the below links:
https://www.snowskool.com/snowboard-instructor-courses/new-zealand/11-weeks
https://www.snowskool.com/ski-instructor-courses/new-zealand/11-weeks