I am an A2 Student who achieved a D in chemistry and C in biology for AS due to lack of work!. this year i have tried harder but haven't gone into full revision mode. I know i must do better than last year (at least B's) and so i'm wondering have i left it too late. there's about 3 months til my exams but baring in mind i must revise all of AS and A2 and improve my grade i'm not sure i can do it. Any ideas