I got a CEE in my EOY 12 mocks - what's the best option for me?

I do bio chem and econ and i got a C in econ, and Es in both bio and chem. In bio, i wasn't far off from achieving a D, and my school is now telling me to retake. However, I don't want to waste a year of my life, and I believe that if i work over the summer holidays properly, I will be able to at least boost my grades to a C. I have the privilege of using UpLearn as a platform, and i will begin to use it much more than before.
Do you think this is a good idea?

I do bio chem and econ and i got a C in econ, and Es in both bio and chem. In bio, i wasn't far off from achieving a D, and my school is now telling me to retake. However, I don't want to waste a year of my life, and I believe that if i work over the summer holidays properly, I will be able to at least boost my grades to a C. I have the privilege of using UpLearn as a platform, and i will begin to use it much more than before.
Do you think this is a good idea?

If it was a C in just one subject, your plan might work. But realistically, unless you were just really slacking off in Year 12, it’s gonna be hard to get your grades up in time for UCAS applications and A-levels. I think retaking Year 12 might be your best bet.

did you revise a lot and still struggle?

Since you have Uplearn at your disposal, make use of it. It’s good to see you are being proactive and taking steps to improve in biology and chemistry.

Keep up the good work over summer and I’m certain you’ll see an appreciable level of progress.

If you want some further ideas for chemistry, see here: https://www.thestudentroom.co.uk/showthread.php?t=7253201&page=2#post97549790

I agree with MetellaInAtrio here on the most part—what sort of grades are you aiming for? If you want Bs or similar, then I might suggest retaking. Still, you seem really committed to working this summer and you’ve got UpLearn.

When do you have to make the decision as to whether you’re retaking? Maybe you could wait until near the end of the summer where you’ve had the chance to work, do a bunch of past papers and see what grades you’re looking at then.

So I have pretty good grades. I have A's in English language and literature, expecting to move up to A*'s as we get closer to university applications, but biology is my weak link. I've been predicted a D for a while. But I do partly blame it on the fact that I originally took 4 subjects (just dropped chemistry around a month ago). I've been worried about this predicted grade for a while, but I finally have a conclusion to share.
Obviously this may not be the same in every school/college, but we literally just got sent an email today saying that our predicted grades will be based on the September/October mock exams (we will only sit 1 paper in biology for some reason) and the UCAS predicted grade will be whatever we achieve in that mock, or 1 grade above if we were close to that next grade if you get what I mean. Hopefully that helps. I know I'll be working hard over the summer.

I know it's not related to this conversation but what exam board do you do for eng lang? What advice can you give? (you can pm if you want)