Heyo!! I'm the aforementioned Potatohater and hearing that you do geography and general maths makes me super excited!!! UNTIL I heard you might be dropping one
The above advice is spot on, don't worry about ranks and scaling just yet, it's early days, so drop what you dislike the most. You're 100% garunteed to do subjects you enjoy cause you can put passion into your work.
Personally I LOVE geography and would highly reccomend keeping it! It is harder than general maths in my opinion but it's also highly interesting and more engaging. Plus there's heaps of fun ways to study for it, where as maths is mostly practice questions. I'll be moderating the Geo board so I can help you as much as I can and help you climb the ranking ladder. Plus, you havnt done your 1st assesment task yet so who's to say you won't smash it? I was stressing about not being 1st in geo after my 1st assesment and thought it was all over for me, but that totally changed through out the year and I ended up getting first so anything is possible!!
That's not to say that genral is bad, I also really enjoyed general. It's easy and mostly straight forward and the answers are a little more objective than geography. So ultimately it comes down to which one you find the most passion in. (Or you could keep both and drop something else
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Ultimately, don't rush the descision, take your time and make sure there's no regrets. I also had lots of extra cirriculars and was doing 12 units up until June, because I didn't want to make the wrong descision, and even with only a term of free periods I greatly improved in everything. Not saying leave it until June too, just letting you know it's ok to take your time with these big descisions.
I wish you the best of luck and look forward to future updates