At Northeastern University, students gain substantial work experience while they are working towards their diplomas. Most of Northeastern's undergraduates complete at least one professional co-op during their college career, working for one of more than 2,000 employers around the world. Students can choose to complete their degree in four years, with the potential for two co-ops, or five years, building in time for three co-ops. Outside of the classroom and workplace, there are more than 300 clubs and organizations for students, including about 25 fraternities and sororities. The Northeastern Huskies compete in the NCAA Division I Colonial Athletic Conference. More than 3,000 students compete at the club and intramural sport level. Freshmen and sophomores are required to live on campus. Northeastern’s campus is spread out across 73 acres in the venerable college town of Boston.