So I just recently started year 12 now doing Maths alongside chemistry and C.S. However chemistry and C.S are both going great for me, but for maths somehow I feel like I lost quite some knowledge from Maths GCSE which I find worrying. I really love maths and planning to do that at uni, although I got an A for maths GCSE, I want to get an A* for this A-LEVEL. In pure maths textbook, the chapters started off easy but as most of those topics were largely GCSE on the other chapters, I could not attempt some and when I try recovering knowledge I feel like I am losing time with this subject and limiting my revision time with others and not keeping up to date.
Please share any ideas on what I could do, Thank you