Bouts

A Bout divided into an arbitrary number of 'jams', which each last up to two minutes. The point of the game is for each team to get their point scorer, or 'jammer', past all the opposing skaters, as many times as possible. The 'pack' of skaters block against each other, trying to clear space for their jammer, while getting in the way of the opposing jammer.
Cheer loudly when a referee announces a 'Lead Jammer'. This happens when one of the jammers emerges first from the pack in their first lap through. This jammer now has the power to end the jam before two minutes elapse (the maximum time per jam). This can be a big strategic advantage for her team.