tactic
A plan or action you use in a game to help you or your team succeed.
offence
When your team has the object and is trying to score.
defence
When the other team has the object and you are trying to stop them scoring.
marking
Staying close to one player on the other team so they can't easily get the ball.
goal-side
Standing between the player you're marking and the goal you're defending.
give-and-go
Passing to a teammate, then quickly moving to open space to get it back.
ready position
Knees bent, weight on the balls of your feet, eyes on the play, ready to move any way.