In the WWAMI model, first-year basic sciences are offered at the Seattle, Washington, campus and at five regional campuses. Second-year medical students train in Seattle, and students in the third and fourth years are offered clerkship sites located in Seattle and in the five-state region. In 1974, University of Washington School of Medicine students could choose from 10 sites in four states outside of Seattle. In 2013, there were 180 locations across five states involved in training physicians. This includes six first-year sites and more than 130 required clerkship sites, including those outside of Seattle.