Dear Friend,
I am more upset about your seemingly depressed state than your grades, by the way my favorite subject was Chemistry. May be able to help. Its the basics you have to keep firmly in mind then all should go well. However coming back to your deeper problems......I somehow sense that frustration in life has lead to your habit of drinking, and also perhaps many other things. Sometimes "fate" can be cruel. It might be bent on breaking us mentally, physically, emotionally and financially over and over again or constantly till we get bitter, resentful, feel useless, helpless and lost, it is at this time that we resort to the only things we know to bring us happiness, so we can forget the past as well as what remains hurt deep within at present. I offer my friendship. I also teach 11th grade students, chemistry and could give you some useful basics, as I find if you don't know the basics, you cannot follow anything!! Easy and natural. You are precious, You are also well able to make a GREAT Success of your life. Much Love, Your Friend, The Friend.