First and second years are block-scheduled, systems-based. The first year is the usual normal structure/function (anatomy, physiology, biochemistry, embryology); the second year is pathology/pathophysiology/pharmacology/microbiology. Lectures are held in the morning and are usually optional. Small group workshops and sessions are held in the afternoons and are almost always mandatory. These courses are graded as honors/pass/fail.
There is also a parallel two-year course called "physicianship," which covers the non-science aspects of medicine and health care. It includes your outpatient community preceptorship (the "Student Continuity Experience") as well as instruction in patient interviewing and physical exam skills. The physicianship course is pass/fail.
Your required clerkships during 3rd year are in internal medicine, pediatrics, surgery, ob/gyn, neuro, psych, and a four-week ambulatory rotation in either internal or family med. There is a required rotation in emergency medicine that is during 4th year.
If you have any other questions, feel free to ask.