<P> Lacrosse is a full field, 10 vs 10 contact sport . Each team has one goalie, three defenders, three mid fielders, and three attackmen . Throughout the contest, players attempt use their sticks to shoot the ball into the opponent's goal . At the end of the game, the team with the most goals wins . In college lacrosse, the games consist of four, fifteen minute quarters . This game length decreases to twelve minutes per quarter at the high school level, and decreases to ten minute per quarter at the little league level . </P> <P> Each team must have four players (a goalie and three defenders typically), on their defensive side of the field at all times . They must also have three players (usually three attackmen) on their offensive side of the ball at all times . The remaining three players (usually midfielders or middies) are free to roam the field as they please during the game . There are ten players on the field at a time . Still each team is allowed a maximum of seven players on their half of the field at a team and six players on their opponents' side of the field at a time with the goalie being the extra man . Like hockey, substitutions are considered "on the fly" meaning that the players may enter and exit the field during gameplay assuming each team has a maximum of ten players on the field at the time . The game essentially has the same rules as hockey and is played both indoor (box lacrosse) and outdoor (full field). </P> <Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2018) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2018) (Learn how and when to remove this template message) </Td> </Tr>

How many lacrosse teams are there in the us