Hello, so i am giving retakes for bio/chem. Last year i had Cs in both and now i want to make that into A*s. I used the mary jones book for biology but i've seen that the marking schemes of new syllabus papers have things that are not mentioned in there so any book recommendations? For chem i have heard that m.ayub book shoud be used or chemguide notes. What do you think guys? Any tips? It's scary as i cannot take tuitions or even practical classes this year due to financial probelms. How should i manage all these papers and get A*s? Ty for helping 