in halting it. The Pro Bowl, traditionally played after the end of the NFL season (since 2011 played the week prior to the Super Bowl), is also considered an exhibition game. The Arena Football League briefly had a two-game exhibition season in the early 2000s, a practice that ended in 2003 with a new television contract. Exhibition games outside of a structured season are relatively common among indoor American football leagues; because teams switch leagues frequently at that level of play, it is not uncommon to see some of the smaller leagues schedule exhibition games against teams that are from another league, about to join the league as a probational franchise, or a semi-pro outdoor team to fill holes in a schedule. College and high school football Many college football teams, particularly larger organizations, play a public intramural exhibition game in the spring mainly to promote the team and give new recruits an early chance at public game action. Many of these intramural games are nationally televised, though not to the same level of prominence as intercollegiate play. In college sports the commonly used term for the major scrimmage at the end of spring practice is the "Spring Game." True exhibition games between opposing colleges at the highest level do not exist in college football; due to the importance of opinion polling in the top level of college football, even exhibition games would not truly be exhibitions because they could influence the opinions of those polled. Intramural games are possible because a team playing against itself leaves little ability for poll participants to make judgments, and at levels below the Football Bowl Subdivision (FBS), championships are decided by objective formulas and thus those teams can play non-league games without affecting their playoff hopes. High school football teams frequently participate in controlled scrimmages with other teams during preseason practice, but full exhibition games are rare because of league rules and concerns about finances, travel and player injuries, along with enrollments not being registered until the early part of August in most school districts under the traditional September–June academic term. Some states hold preseason events known as "jamborees" in which several pairs of high school football squads take turns playing one half (usually 24 minutes of game time) to give players some experience before the first official game. Another high school football exhibition contest is the all-star game, which usually brings together