Well, I guess next time make sure you read the book.
But since it's too late for that, as mentioned above, the movie "Frankenstein", starring Kenneth Bragnah (sp?) and Helena Bonham Carter, follows the book much closer than other movies. Also, try reading reviews of the book (do a Google or Amazon search). These won't guarantee you an "A" (only reading the book would do that) but they may help.
And if anyone asks, you don't know me.