I am going to self learn A level chem, further maths and maths in the next two years, and apply for university next year. How long should i spend on a subject a day. I am thinking of alternating between the subjects so chem and FM core on mon, tue and wed and maths, and stat and mech for regular maths and FM on tue and wed. How long should I spend on say Chem and FM core on the days i study them, 4 hrs for each subject per day? I want A*s in all three.