NCAA Men's Basketball Tournament

The NCAA Men's Division I Basketball Championship is a single-elimination tournament held each spring in the United States, featuring 68 college basketball teams, to determine the national championship in the top tier of college basketball. The tournament, organized by the National Collegiate Athletic Association (NCAA), was created in 1939 by the National Association of Basketball Coaches, and was the brainchild of Ohio State university coach Harold Olsen. Held mostly in March, it is known informally as March Madness or the Big Dance, and has become one of the most prominent annual sporting events in the United States. The tournament teams include champions from 31 Division I conferences (which receive automatic bids), and 37 teams which are awarded at-large berths. These "at-large" teams are chosen by an NCAA selection committee, as detailed below. The 68 teams are divided into four regions and organized into a single elimination "bracket", which predetermines, when a team wins a game, which team it will face next. Each team is "seeded", or ranked, within its region. After an initial four games between eight lower-seeded teams, the tournament takes place over the course of three weekends, at pre-selected neutral sites around the United States. Lower-seeded teams are placed in the bracket against higher seeded teams. Each weekend cuts three-fourths of the teams, from a Round of 64, to a "Sweet Sixteen", to a "Final Four"; the Final Four usually play on the first weekend in April. These four teams, one from each region, battle it out in one destination for the national championship.