Felt the need to reply after months of agonising whether to try and dissuade DD1 from taking AS maths with a mid-A GCSE grade (early sitting).
We did the rounds of 7 sixth forms, the prospectus for 2 stated that B from a higher paper was acceptable. But on speaking to the maths departments, gleaned that the clause was only there to allow for an A/A student having a slip up on the day. All the others required A for Maths, and all but one required A for FM.
In the end, I made a list of pros and cons (below), have not tried to talk her out of it, and she will be taking it.
PROS
GCSE teacher thinks she is capable
Much lower mark on easier non-calculator paper
Immature and sloppy
Difficulty remembering methods, theorems - hence marks list
Understands ALL the GCSE topics,
Would struggle much more with a written subject
It will support her Physics A level
She only plans to take it to AS, unless it goes exceptionally well (and something else goes exceptionally bad)
I have the mathematical knowledge to help her understand where she is going wrong.
She recognises very quickly when she is struggling and doesn't bury her head in the sand.
She expects it to be difficult, so not going in with rosé tinted specs.
CONS
She doesn't particularly enjoy maths
She doesn't specifically NEED maths, although core subject advisable
Chosen as expects it to be easier than remaining options, so the best of a bad bunch.
Her other 3 subjects are 'hard'.
She has the added pressure of changing schools and leaving all her friends behind.
I'm not saying she has made the right decision - but she has definitely not taken it lightly, and no teacher has ever advised her not to do it.
Incidentally, with sciences being seen as the hardest, I agree with the poster earlier that says it depends how your brain is wired.
Also been told at 6th form open evenings (by science teachers) that sciences are the least step up from GCSE to AS, with Physics being the least. May depend on GCSE exam board.