If it is deciduous, it looks more like a Brachychiton (used to be called Sterculia) - probably B. acerifolia. This is the Australian Flame tree. It is covered with beautiful red flowers when adult before the leaves come out. It could also be the Stenocarpus but I think this is an evergreen. Unfortunately they take many, many years to come in to flower but are well worth waiting for.
I'll put in another vote for Stenocarpus, I have one and the leaves look very much like mine. I also have Brachychiton acerifolius, and as the species name implies it has leaves that are somewhat maple-shaped so it's definitely not that one.
It's not Brachychiton. While the leaf shape is somewhat similar, the leaves on Brachychiton acerifolia are quite hairy both on the top and bottom surfaces, while the photo seems to show glossy hairless (at least on the top) leaves. It's not an White Oak. The leaves are the wrong texture (too glossy, look thick and evergreen), and the leaf shape while similar looks different than White Oak and from what I can see of the bark, it's not correct either.
It looks like the plant in question is still young and so has vigorous juvenile leaves which will be somewhat different than their adult form(but not in texture). It definitely could be Stenocarpus Sinuatus, and I've also seen young Breadfruit Trees that have similar leaves. But I'll give the nod to the Aussies who think it's Stenocarpus Sinuatus since they're probably much more familiar with how it looks as a young plant than I am.