(aka Corners). A corner kick is a method of restarting play. When the ball goes out of bounds over the end line (aka the "Goal Line") and was last touched by the defending team, the attacking team inbounds it from the nearest corner by kicking it in from the Corner Arc (note: this doesn't apply if a goal was scored). Defenders must stay 6 yards back if U-8, 8 yards if U-10 & 10 yards back if U-12 or older. (If they don't, they might get a yellow card). The ball may be placed anywhere inside the Corner Arc or on the Corner Arc lines. There are 2 types of corners: a "Long Corner" and a "Short Corner". A player is not offside if he receives the ball from a Corner Kick. The ball is in play when it is kicked and moves. A goal may be scored directly from a corner kick. The kicker may not play the ball a second time until it has touched another player. (See "Short Corner" & "Long Corner", and "Offside Rule").
Below is what the official FIFA rules say about Corner Kicks:
A corner kick is a method of restarting play.
A goal may be scored directly from a corner kick, but only against the opposing team.
A corner kick is awarded when the entire ball, having last touched a player of the defending team, passes over the goal line, either on the ground or in the air, and a goal is not scored in accordance with Law 10. Law 10 is "The Method of Scoring" and basically says that a goal is scored when the entire ball -- not just part of the ball -- passes over the goal line, between the goal posts and under the crossbar, provided there wasn't a foul or a law broken in the process of scoring the goal (an example of when a goal would be disallowed is if the team scoring the goal was "offside"). Click here to see a diagram of a soccer field.
The ball is placed inside the corner arc at the nearest corner flagpost.
The corner flagpost is not moved.
Opponents remain at least 9.15 m (10 yds) from the corner arc until the ball is in play.
The ball is kicked by a player of the attacking team.
The ball is in play when it is kicked and moves.
The kicker does not play the ball a second time until it has touched another player.