NBME are usually finals for a given course. The course doesn't prepare u for the NBMEs, u need to prepare and teach yourself in the way how they will ask u questions on NBME exams. NBME exams are clinical vignettes, class tests are not. I usually study Kaplan and read BRS books, designed to teach u the material and prepare u for NBME exams. Step 1, which is later... no preparation, but its great that we have NBME exams so we know how the Step 1 questions will be like.

__________________
I procrastinate....