im taking biology chemistry physics and mathematics as my a levels im 16 in year 12 right now. i got an 8-8 in combined science GCSE and a 9 in maths GCSE. At the start of the year wanted to take Further Maths but because I ballsed up an introductory test that I didn't revise for i got around 56%. Anyway I looked through the answers and found out she actually marked 10 of the questions incorrectly (put through the computer and everything), I asked her to remark the test but she refused, calling me arrogant for underestimating her ability as a teacher. The further maths teacher called me about the incorrect results on my test, long story short the bald prick told me to **** off because he thought I wasn't any good despite my 9 grade and I had to take biology as a fallback subject because it fit with the rest of them. Its been about 8 months now since I've been in sixth form and I have predicted As in all 4 subjects including maths based off of topic tests + Easter mocks. i really want further maths as an a level and I'm heavily considering going back and doing it after I get my a levels, which im sure ill do good on as long as i revise enough. tbh I don't really have a social life so I spend most of my day studying and going to the gym so I'd have more than enough free time when I'm 18 to take on further maths even if it is incredibly difficult, math is my favorite subject and I study further maths topics like complex numbers and further math trig (hyperbolic functions etc.) outside of school for fun anyway. I have literally no idea what I want to do with my future but the top contenders are uni physics/engineering, uni math or uni chemistry whatever earns the most money. is further maths a big deal enough for me to go back and spend another 1/2 years after sixth form for the a level (like online courses, using the textbook to selfstudy etc.)?