It sounds like the Australian system is more like the Canadian. Yr 11 & 12 for me was : English, Biology, Chemistry, Physics, Math 1, Math 2 (the biology was dropped in yr 12 when you may have only 5). We were required to have at least one humanities and one math/science so you could instead have studied: English, French, German, History, Biology (just making that up).

Math was not broken down into parts (algebra, geomoetry, etc), just "Math", but was streamed into easier and harder classes (I think they called the easier stream "business" math when I was at school, and meant by that shop keeping type math). You could do math 1 stand alone, but math 2 required you do math 1, although they were delivered simultaneously.