Formally: Cambridge have a few studies that show that AS and A-Level performance have very bad correlation for the mathematics degree there, even GCSE performance has a better correlation. STEP performance however, has the highest correlation for any subject ever. Something like ~50%.
Common sense: would you rather distinguish candidates based on a test that consists of sitting down, writing some crap that demonstrates no understanding whatsoever of mathematics and get an easy A* that literally half the candidature get and literally 99% of the maths applicants will be getting A*A*A - A*A*A* effortlessly or a test with which only 160 of your offer holders can get a decent grade and filters the candidature to an reasonably modest level by not only being an extremely difficult test aimed at the top 2% of the a-level mathematicians, that requires actual thought, creativity and mathematical ingenuity but also by allowing admissions tutors to view the actual scripts of the candidates to see their thought process.
tl;dr an idiot could get an A*A* in maths and further maths, STEP requires actual talent. Cambridge wants actual talent, not idiots.
Physics lover here myself, sorry to here about your exam I really hope you score the grade you want and the boundaries are nice to you! Thanks for your advice What do you plan on studying?
Physics was the love of my life and then Alevels happened I havent completely decided yet but I may do chemical, geological or mechanical engineering What are ur plans?
it's not even a matter of "staying up", I sleep around 4/5am these days so I'll be part of my "day" in a way. if I get into uni idek how I'm going to get my sleep back on track
5 hours 5 hours 5 hours although I'm not actually worried about maths grade boundaries so I'm not sure why I'm excited. I'm more worried about OCR Chemistry.
What do you reckon the chemistry boundaries will be this year? Given the new course and breadth/depth style