article_snippet: Selection Sunday (March 15)
article_snippet: A 10-member panel determines seedings for the 68 teams that make the knockout  tournament .
article_snippet: First Four  (March 17-18)
article_snippet: A format started in 2011, 8 teams compete to qualify in the main draw .
article_snippet: Second round (March 19-20)
article_snippet: 64 teams split into 4 regions: Midwest, West, South and East .
article_snippet: #1 plays #16 in each group .
article_snippet: Third round (March 21-22) Down to 32 teams .