Double cohort brought challenges to the teaching, study and residence spaces at the campus due to increase in first-year enrollment. In response, the Academic Research Centre (ARC) and Joan Foley Hall were constructed. The ARC was built in 2003 as an extension of the Bladen Building with a copper finish. It allowed for the relocation and expansion of the library to its present state and introduced the campus's first 300-seat lecture theatre, which has since held the Watts Lecture series, after formerly being held in the Meeting Place. The Doris McCarthy Gallery, also found in the ARC, exhibits works by local artist and campus alumni, Doris McCarthy. The Student Centre was opened in 2004 through a project that was initiated and funded by students. Constructed using 18 tonnes of recycled steel from a demolished gallery at the Royal Ontario Museum, the three-storey Student Centre earned a Leadership in Energy and Environmental Design (LEED) certification as well as a Green Design Award from the City of Toronto. The Social Sciences Building, home of the Department of Social Sciences, also opened in 2004 as the Management Wing but took its present name after the completion of the Instructional Centre in 2011, which became the new home of the Department of Management, the Department of Computer and Mathematical Sciences, and offices of cooperative education programs. Brick and limestone were used to create the Arts and Administration Building, completed in 2005, which holds the principal's office. The Science Research Building, where post-graduate research facilities and a lecture hall are located, is an extension of the Science Wing that was completed in 2008.