Indiana University Bloomington (IU Bloomington, IU, or simply Indiana) is a public research university in Bloomington, Indiana. It is the flagship institution of the Indiana University system and, with over 40,000 students, its largest university.Indiana University is a "Public Ivy" university and consistently ranks in the top 100 national universities in the U.S. and among the top 50 public universities. It is a member of the Association of American Universities and has numerous schools and programs, including the Jacobs School of Music, the School of Informatics, Computing, and Engineering, the O'Neill School of Public and Environmental Affairs, the Kelley School of Business, the School of Public Health, the School of Nursing, the School of Optometry, the Maurer School of Law, the School of Education, the Media School, and the Hamilton Lugar School of Global and International Studies.As of Fall 2017, 43,710 students attend Indiana University. While 55.1% of the student body was from Indiana, students from all 50 states, Washington, D.C., Puerto Rico and 165 countries were also enrolled. As of 2018, the average ACT score is a 28 and an SAT score of 1276. The university is home to an extensive student life program, with more than 750 student organizations on campus and with around 17 percent of undergraduates joining the Greek system. Indiana athletic teams compete in Division I of the NCAA and are known as the Indiana Hoosiers. The university is a member of the Big Ten Conference; since it does not have a mascot, all teams are known simply as "Hoosiers".