The defensive player throws the ball out to each offensive player located around the perimeter.
He closes out with proper technique and foot positioning.
After each closeout, the offensive player shoots the ball and the defense blocks out.
After the shot is taken, the defender sprints to grab the rebound and then throws to the next offensive player.
Closeout with proper technique
Communicate your closeout (i.e. "I got ball!")
Move on the air-time of the ball - be there on the catch
Closeout with proper foot positioning (match feet) and pick-up points (red light, yellow light, green light, etc.)