There are nine violations that officials have to be aware of over the course of a game.
Traveling is when a player moves before dribbling the ball.
Double dribble is when you dribble the ball with both hands simultaneously.
Carrying is when a player scoops underneath the ball while dribbling.
Over and back is when a player brings the ball into the frontcourt then brings the ball back across the half court line.
3-second violation is when any player has at least one foot inside the paint for 3 seconds.
5-second violation during an inbounds play. When a player inbounds the ball he has 5 seconds to put the ball in play, if he can't inbound the ball then ball will be given to the other team.
10-second violation is occurs when it take a player ten seconds to get the ball past half court.
It is also a good idea to point to where the ball when out of bounds or how it ended up out of bounds. For example, if you saw the ball go off a player's knee tap your knee to signal what you saw.
Excessively swinging your elbows away from your body is another violation. It is not a foul unless it makes contact.
Kicking is when a defensive player intentionally deflects the ball with his foot
These are the violations that occur throughout the course of a game.