This year I havnt been bludging but I havnt been trying and now I got my yearlys back and i got 17%. I need to continue 2 Unit so i can go my Computer Science Degree but I feel like I can catch up but I only got 4 weeks but my math teacher said we dont start hsc course till week 3 next term. I know the basics of each topic just not trig and thats the reason why i got 17%. Im willing to make the effort which is studying everyday and maybe 1 day off on the weekend but till hsc starts and continue with that so I dont fall back again but is this possible I was getting 70-85% last year in math every test but we did them after every topic so the information was fresh but for my last yearlys they werent even though i did study 18 hours the day before the exam. Should I drop to general or study and catch up.
You won't be able to do computer science if you drop to general. The first year math subjects you have to take in computer science assume extension 1 maths at LEAST. I only did 2u, and am struggling, but plenty of people have done only 2u and done fine, so don't worry. But I'm going to guess there's little chance of you passing uni math if you can't do 2u.
So you have to have a think if you want to do computer science, and if you do, if you're willing to fix your study habits for math.
I'm not trying to put you off computer science, in fact I recommend you go for it if you're interested. I just recommend you keep your 2u math.
Obviously something is going very wrong with your study technique. Only you will be able to tell what you're doing wrong. Are you actually doing math and homework every day (at least every school day)? Make sure you are. It's a subject that needs tonnes of practice.
Make sure you know plenty in advance when any assessment/test is coming up. Put it in your calendar and remind yourself 2 weeks at LEAST in advance, so you can start revising for 2 weeks. You could increase this if you think it's still not enough time.
I think you can definitely increase your marks if you recognise where you went wrong and fix up whatever is getting you low marks. But obviously you have to be careful because you don't want to get the same marks again in the HSC because it will bring your ATAR down and you might not even get into comp sci.