Have no direct experience with Perth of late Annie, but it could be becoming like little England over there with it being popular with UK migrants of late.
WA and Perth in particular has been booming over last decade especially and even before that with mineral exploration and industries.

The upshot is that there will be plenty of newer suburbs with newer schools and though the downside can be a government not leeping up with expansion, the minerals boom has also meant governments there have been flush with funds, and even with corruption issues I'd imagine the education budget has not been lacking too much.

Real Estate prices also booming are not what you would want to hear but then if you are planning on renting a year or two which can be a good move, it could be good timing for - Rate rises hurt house prices: analyst - prices may be plateauing and with interest rates expected to still rise some, more pricing drops could occur.

One thing that people can often overlook is that regardless of what type of school a student goes to, come time to move on to a university they are all going to be back together.