The one-size-fits-all answer: Get one of those "Complete 1st grade curriculum" books (or separate math and language books), figure out where she is in it, and have her do a few pages a day. These aren't ideal, but it's 1st grade, and a temporary situation, so it should get you through just fine. Or, if you can keep her consumable workbooks from her current school, you could just do that.
Â
The more individualized answer is going to depend on a lot of factors.
Â
When is she starting school in NZ? 2 months vs. 6 months might make a difference in what you choose to do.
Â
Is her current academic level ahead or behind where she'll be expected to be academically - are you playing catch-up to finish 1st grade faster than you would normally, or could she pretty much unschool until you move and still be on track?
Â
How is she being taught math and reading currently? How will they be taught in NZ? If they're different, there may be a curriculum you could use now that would help prepare her for that transition.
Â
Â
In any case, I'd probably focus on the basics - reading, writing, and math, as well as learning a bit about NZ history, geography, and so on.Â