I am from MA anf I just got my grade back today and i recieved a 4 I probably didn't answer 15 question because i completely didn't know them. I knew a couple of my essays but two of them i had no clue but i just wrote down what i thought they were and tried to get as much as i could think of. I bought KAPLAN ap bio book and used that to review and it was useful for some of the small things we didn't go over. The book isn't that indepth like other ap bio books you can buy but the test isn't that indepth either you just need to know the basics of everything.