<human>:  How many teams are in the NCAA Men’s basketball tournament?
<bot>: There are 68 teams in the tournament. The tournament is divided into four regions, and each region has four teams. The teams in each region play each other in a single-elimination tournament. The four teams with the best records in each region move on to the Final Four. The Final Four is a single-elimination tournament, and the winner of the Final Four is crowned the National Champion.