Well if you are ready for the long story I'm about to tell you, bare with me.
Many teachers 'care' about what mark I will get in my HSC and they focussed on what subjects will help me get it. I just changed my Siggy. As you can see, I was carrying 14U in Prelim, it was ok I suppose but having to do SRC and other school events it got to me and no I'm in yet more things for the school I didn't know what to prioritise first.
So then I went onto the tedious process of getting interviewed by all the teachers who cared about what I would be getting myself into. Firstly, Everyone was like "Dance will be bad for you" but there was no way that I will be dropping it even though I am the only one in my class. So I went to my Maths teacher wit the possibility of doing Ext 2 Maths, he was sceptical about it, so I changed my mine. Then there was an opportunity of Senior Science opening on the PDHPE line which I soooo badly wanted to drop. Went to the process of "Why you want to do Senior". Then Maths H.T. Spoke to me about not doing Senior and doing Ext 2 Maths [still scared of it] then spoke to Deputy Principle today adn he reckons 11U is enough and leave Senior Science.
Wow I've never written anything this long before. So I guess the answer to your question is, They didn't think it was worth me putting the extra time doing Senior Science where I could be putting that time into English [which I need improving]. But no decisions can be made until we get our reports.... Arg...