How to Kick Off in Football

1). Line up on the appropriate ends of the field. Depending on your league, the team that just scored, or the "defending team," will place the football on the 30- or 35-yard line. The 11 men on this team spread the field in anticipation of the kick. On the opposite side of the field, the receiving team's 11 men spread out, ready to return the kick.
2). Place the football on a tee. During game play, a tee is used to hold the football. However if it is exceedingly windy, a member of the defensive team will "hold" the football the way that a football is held just prior to a field goal attempt.
3). Wait for the referee to blow the whistle. Because you are coming out of a situation where points have been scored, the football is considered dead. The referee will blow the whistle to signal that game play can commence. (Note that in certain leagues the play clock is run during the setup of the kickoff. This means that a team has 35 seconds to get the play off without being penalized. If your league uses this clock, keep yourself aware of it.)
4). Kick the football down the field to start or restart game play. Depending on the situation, the defensive team may want to kick the ball so that the defense is forced to take a "touchback" (where they receive the football in the end zone and kneel to commence play on the 20-yard line) or they may want the football handled by the offense so that the clock begins to run out. Be keenly aware of the situation so that your team utilizes the kickoff to put itself in the best position to win.
5). Rush down the field and make the tackle. Once the ball is kicked, it is "live." The clock will start when the football is touched by the offense. Make the tackle or cease trying to accomplish that when you hear the whistle blown by the referee. At this point, the respective offensive and defensive units will come onto the field in preparation for the next play from scrimmage.