The NCAA Division I Men’s Basketball Tournament, also branded and known as NCAA March Madness, is a single-elimination tournament played each spring at the USA, now featuring 64 college basketball teams in the Division I level of the National Collegiate Athletic Association (NCAA), to determine the national championship. The championship has been Ohio State coach Harold Olsen’s idea, and was created in 1939 from the National Association of Basketball Coaches.  Played during March, it has become one of the most well-known annual sporting events in the United States. 
The tournament teams comprise winners out of 32 Division I conferences (that get automatic bids), and 36 teams that are awarded at-large berths. All these”at-large” teams have been picked by an NCAA selection committee, then announced in a nationally televised event on the Sunday preceding the”First Four” play-in games, currently held in Dayton, Ohio, and dubbed Choice Sunday. The 68 teams are divided into four regions and organized into a single-elimination”bracket”, which pre-determines, when a team wins a game, which team it will face next. Each team is”seeded”, or rated, within its region from 1 to 16. During the course of three weekends, the championship happens Following the First Four, in sites across the USA. Teams, seeded by position, proceed through a single-game elimination bracket starting with a”first four” consisting of 8 low-seeded teams playing in 4 games for a position in the initial round the Tuesday and Wednesday before the first round starts, a first round comprising 64 teams playing 32 games within the span of a week, the”Sweet Sixteen” and”Elite Eight” rounds another weekend and week, respectively, and — to the last weekend of the tournament — that the”Final Four” round. The Final Four is played during the first weekend of April. These four teams, one from every region (East, South, Midwest, and West), compete at a preselected place for the national championship.
The tournament has been at least partly televised since 1969.  Currentlythe games are broadcast by CBS, TBS, TNT, and truTV under the trade-name NCAA March Madness. Since 2011, all games are available for viewing and internationally. As television coverage has increased, so too has the tournament’s popularity. At present, millions of Americans fill out a bracket, attempting to correctly predict the results of 63 matches of the tournament (not including the First Four games).
With 11 national titles, UCLA gets the listing for the many NCAA Men’s Division I Basketball Championships; John Wooden. The University of Kentucky (UK) is second, with eight national titles. The University of North Carolina is third, with six national titles, and Duke University and Indiana University are tied for fourth with five titles. The University of Connecticut is sixth with four titles. The University of Kansas (KU) & Villanova are tied for 7th with three national titles. Since 1985, once the tournament expanded to 64 teams, Duke has won five championships; North Carolina and UConn have won four; Kentucky & Villanova have three; Kansas & Florida have 2; and Arizona, Arkansas, Indiana, Maryland, Michigan, Michigan State, Louisville[a], Syracuse, UCLA, UNLV, and Virginia have you.
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