I disagree with a lot of what's been said in this thread, and in other posts that have recently cropped up around the forum. I most definitely disagree with the idea that we should be pushing content from higher year levels down, but there is something a bit off with the pace of Year 7 to 10, for sure. I don't disagree with the idea that high school education is quite lacking, and I think if we could fix that then the pace of Year 7 to 10 (with some new content introduced) is probably fine without having to introduce calculus earlier.
This is something that I've been thinking about a lot and I think I've settled on the idea that mathematics education does not need to be compulsory. To answer the kind of question that gets asked about maths in school a lot, "when are we ever going to use this?", I think my answer to that would be: for the majority of people, you're not, for most people the actual content that you learn is useless. I'd take up the view that maths should be taught for the same reason why we bother teaching English, history, art and so on.
The proposed Australian Curriculum subject "Essential Maths" is most definitely worthless - surely if you need to learn that content for a job, you can pick it up as you travel along with life. For the students that do VCE Further Maths only, I'm not convinced that they're gaining much from it. Sure it teaches a bit of statistics and statistics is important to know, but I don't think it teaches it well. A proper statistics course would be nice, but I'm not sure if that imply that calculus would be required (probably). For the students that do Methods, Specialist and then go on to do more maths, there's also something a bit lacking there.
To answer the kind of question like "why do we bother teaching maths?" I'd lean towards the ability to deal with abstract concepts, as well as logic and reasoning are what you learn from it. This means that I'd like to see proofs, at least to some level, be emphasised in the teaching. At younger year levels stuff like picture proofs and other simple to understand reasons for why a formula might work would be excellent. I think this would dispel the notion that mathematics is just the memorisation of "a lot of crazy formulas". I think proofs would also allow you to bring in very brief discussions about the history of mathematics quite naturally, and firmly set in the idea that mathematics is an evolving discipline that's changed over time. That'd also hopefully bring in a little bit of appreciation for the fact that the concepts that you learn in maths sometimes took centuries to develop.
I don't mean to say that maths education should be completely rigorous i.e. you probably don't need to teach epsilon-delta stuff in Year 11, but there's a lot to be gained from just really honing in on the intuition behind things. A little understanding of what proofs are would make the transition from high school maths to university maths a lot easier too.
Being required to actually tackle ideas more abstractly would probably mean that some content might be introduced earlier. It would also mean that the current pace could seem fine, since there would be much more meat to the curriculum than as it currently stands. I think what I am advocating would make the mathematics curriculum harder to teach and more demanding, for sure.
There's also the idea that mathematics can be beautiful, which from mathematics education in school isn't conveyed very well. I'd like to see the kind of concepts you see in those recreational/popular mathematics books (John Stillwell etc.) taught in younger year levels: some level of number theory, graph theory, game theory, the concept of infinity, simple fractals etc. You could work in some 20th century mathematics that way, and deal with a lot of fun, interesting problems (e.g.
http://en.wikipedia.org/wiki/Seven_Bridges_of_K%C3%B6nigsberg etc.).
My ideal version of Further Maths would be in that kind of vein, have people to deal with those fun kind of problems. You'd be able to rephrase the probability and statistics that's currently taught (and probably a bit more) to fit in well there, since there's a lot of various games and other fun stuff you can view through from the perspective of prob/stats. That would leave the people who don't really 'need' maths to gain some logic/reasoning skills, to perhaps enjoy it (perhaps I'm being a bit too idealistic or naive here). I think that kind of stuff also scales well for people who aren't so good at maths, to people who are quite good at maths - it gives both types of students a lot to think about.
Adjusting for whatever change in the maths content at younger year levels, the content of Methods/Spesh is probably fine once you start emphasising the reasoning behind things over drill computations. I think the introduction of technology in maths was to allow people to not get bogged down in the boring calculations and be able to do more interesting things, but for the most part I don't think that's actually happened.
I reckon articles written by people like Marty Ross (
http://qedcat.com/ed-articles.html) or Keith Devlin are worth reading. It's probably easy to see how much my opinion is heavily influenced by them and similar writing that I've come across.