Dividing the teams takes place during the preseason. Training sessions and exhibition games allow coaches to evaluate talent and give players the chance to prove their worth to the program.
Every year, there are tough last cuts to make before the season starts. Roster limitations or the need to improve skills or mature physically often leave no room for candidates falling just short of varsity.
There is limited movement between varsity and JV after the preseason. However, varsity players getting limited playing time could play JV games, and JV players may get called up to the varsity to replace an injured player, as a reward or for experience.
Varsity teams compete for league/conference championships and the right to appear in postseason action. JV teams may play a shorter season, often without the declaration of a league champion and no postseason.
Successful varsity teams compete in postseason tournaments, which can include league tournaments and state championships. Rosters often expand for the postseason, and JV players may be called up.
Varsity is more competitive, and teams are expected to win. Winning is nice for JV, but developing future varsity players is also vital. In addition, school sports build social skills, foster school pride and passion for the sport, and promote physical fitness.