Princeton’s residential colleges are the center of residential life and an important focus of academic activities for freshmen and sophomores. In fall 2007, the University added its sixth college, Whitman College, and implemented a series of major changes to the residential college system. The most significant was the pairing of three existing two-year colleges with Whitman College and two other colleges. This new system allows juniors and seniors to remain a part of their college and enhances the mentoring relationships between freshmen, sophomores and upperclass students. The executive vice president managed this initiative with the dean of the college.