Please see the links below for the Basic Rules of the game.
AYSO Rules of the Game
Short-sided Game Guide

Fifa Laws of the Game
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Law 1 - Field of Play
Law 2 - The Ball
Law 3 - The Number of Players
Law 4 - The Players Equipment
Law 5 - The Referee
Law 6 - The Assistant Referee
Law 7 - The Duration of the Match
Law 8 - The Start and Restart of Play
Law 9 - The Ball in and out of Play
Law 10 - The Method of Scoring
Law 11 - Offside
Law 12 - Fouls and Misconduct
Law 13 - Free Kicks
Law 14 - The Penalty Kick
Law 15 - The Throw-in
Law 16 - The Goal Kick
Law 17 - The Corner Kick