NCAA doesn't list or recognize big school football championships. But the #1 team in the polls was Nebraska.
Roughly a week before the Season Starts.
Clemson won most of the polls including the AP and UPI.
Oklahoma finished 1st in the AP and Coaches Polls. Tennessee was selected by a majority of the selectors. Both teams are generally recognized as national champions for that season.
Ohio State, Wisconsin, and Georgia all shared a piece of the championship in 1942, depending on which polls you looked at.
There was no official "NCAA Football Championship" though #1 Texas defeated #2 Navy 28-6 in the Cotton Bowl to win the 1963 national championship by virtue of the AP and UPI polls.
6 NCAA championship basketball games have went into overtime.
1997-98 ncaa football season
they were ranked number one all season until they lost to the North Carolina Tarheels in the NCAA men's championship
In 1869 Princeton and Rutgers split the college football National Championship. The first consensus (Coaches' and Media polls) National Championship was Oklahoma in 1950.
Basketball: The national championship in the NCAA is decided by a bracket-based playoff system. If the team qualifies for the event on Selection Sunday, they have the same chance as anyone else in the event: 1 in 65 Football: The BCS system is based on statistical analysis and (in no small part) on the opinions of sports writers from various polls. These polls are based on human opinion, so if a team lost by an acceptable amount in the championship game and was anticipated to go to the national championship, the polls and stats could combine to make it happen.
Yes, in the 1988-89 season.