The NCAA Division I Men’s Basketball Tournament, also known and branded as NCAA March Madness, is a single-elimination championship played each spring at the USA, now featuring 64 college basketball teams from the Division I level of the National Collegiate Athletic Association (NCAA), to ascertain the national championship. The championship has been the Notion of Ohio State coach Harold Olsen, and was created in 1939 by the National Association of Basketball Coaches.  Played mostly during March, it has become one of the most well-known sporting events in the United States. 
The championship teams include winners out of 32 Division I conferences (that get automatic bids), and 36 teams which are awarded at-large berths. All these”at-large” teams are chosen by an NCAA selection committee, then declared in a nationally televised event on the Sunday preceding the”First Four” play-in matches, currently held in Dayton, Ohio, and dubbed Selection Sunday. Even the 68 teams are divided into four regions and coordinated to some single-elimination”bracket”, which pre-determines, when a team wins a match, which group it will face next. Each team is”seeded”, or rated, within its region from 1 to 16. In impartial sites across the United States, the championship happens during the course of three weekends, Following the First Four. Teams, seeded by rank, undergo a single-game removal bracket starting with a”first four” consisting of 8 low-seeded teams playing 4 games for a position in the initial round the Tuesday and Wednesday prior to the first round starts, a first round comprising 64 teams playing in 32 games within the course of a week, the”Sweet Sixteen” and”Elite Eight” rounds the next week and weekend, respectively– and — for the last weekend of the tournament — that the”Final Four” round. The Final Four is usually played during the first weekend of April. These four groups, one from every area (East, South, Midwest, and West), compete in a preselected place for the national championship.
The championship has been televised since 1969.  Currentlythe matches are broadcast by CBS, TBS, TNT, and truTV beneath the trade-name NCAA March Madness. Since 2011, all games can be found for viewing and internationally. As television coverage has grown, so too has the popularity of the tournament. Currently, millions of Americans fill out a bracket, attempting to properly predict the results of 63 matches of the championship (not including the First Four games).
Together with 11 national titles, UCLA gets the listing for the most NCAA Men’s Division I Basketball Championships; John Wooden coached UCLA to 10 of its 11 names. The University of Kentucky (UK) is next, with eight national titles. The University of North Carolina is third and Duke University and Indiana University are tied for fourth with five national 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, when the tournament expanded to 64 teams, Duke has won five championships; North Carolina and UConn have each won four; Kentucky & Villanova have three; Kansas & Florida have two; and Arizona, Arkansas, Indiana, Maryland, Michigan, Michigan State, Louisville[a], Syracuse, UCLA, UNLV, and Virginia have one.
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