You hit the nail on the head there. And it's not just K-12 math, either. I don't know about Australia, but I can see what it's like here in the US. I moved her

You hit the nail on the head there. And it's not just K-12 math, either. I don't know about Australia, but I can see what it's like here in the US. I moved here 7 years ago, and my son has gone through a public elementary school and is currently in the last year of a public middle school. If it was just one year or just one teacher or even just one school (or one district), I could write it off to bad luck. Unfortunately, it's pretty clear that the whole system is abysmal.