Sorry I'm on my phone so can't write lots..... But you have a couple of options....
Start with the teacher - maybe there is a school psychologist they can access to assess her or find a private psych who can do the testing. It can be expensive privately though.

Also it can be hard to find clear discrepancies at this age sometimes - but it is a good starting point. I don't know what's available in Canberra, but maybe someone else on here can let you know

good luck!!!