JibberinoThis is all true, but if one's focus is on really improving one's skiing, this type of work isn't ideal. And as you mention, 90 % of the time you'll be teaching kids, so make sure you can handle that.
Where do you work in Norway?
I work at Hafjell and this is pretty much what it comes down to in my mind at least. If you'r goal is to get good at park then choose something after ski hours, but to me I will much rather have a job I enjoy even if it means sacrificing some park skiing. And for sure I last year I mostly had groups 4-6 years old since it was my first year instructing, I found that to be pretty fun but you need to be patient, next season it will probably be a bit more mixed with more older students though.
And I should say that my skiing outside the park has actually improved allot after I started instructing and paying more attention to my own technique and going to clinics etc.