On a conceptual level?
I'm pretty sure if I carried on physics I'd have felt like this. A couple of times in maths I've not been able to keep up with the pace of the class and had to go over the content in my own time. But I don't know, in retrospect there doesn't seem to be anything where no matter how hard I've tried to understand I couldn't in a-levels.
Not going to lie though, there's a couple of topics in biology where I've just found them so tedious and boring I haven't bothered to completely wrap my head around(i.e absorption of nutrients etc. in intestine and cholera oral rehydration therapy in unit 1).
I'm interested if anyone has, specifically at A2(I'm only doing AS). Also do you think this is more likely to occur at degree level etc.?
Oh, and whenever my teacher tries to prove concepts in a-level maths I don't always follow. Sometimes I do but sometimes I end up switching off due to feeling over-loaded etc.
EMZ=]