Id firstly reccomend Alpha Omega. They've got a maths teacher called Steve, whose absolutely genius and a top bloke as well. He'll help you out with everything and since you live in Strathfield, theyve got a branch in Burwood, Auburn, Bankstown and a few other places.
I pay $75 for both 3u and 4u maths which is like 2 hours each.
I'd say Matrix comes second to Alpha but its still good and Prior is just a rip off.