I was getting pretty average marks, around 70%-80%, for most of year 11. This was partly due to some crap situations for a lot of my assessments like being really sick and the family cat dying but on the whole I wasn't working very hard. I then realised that I needed to put a bit of work into ext 1. I got a tutor for a couple of months, put in some work and got 95% in the end of prelim ext 1 paper. Some time in the holidays between year 11 and 12 I got it into my head that I wanted to do 4U. I basically had to beg and threaten my school to allow me to do it ( since mine was a 'late' application). The moral of this story: the more work you put into something, the better you're likely to do... funny that.