Shell Drill - Phase 3
Purpose
Stresses important defensive concepts.
Drill Setup
Four defenders against four offensive players.
How It Works
Phase 3 – Down Screen: The offense only passes guard to guard at the top. The passer then goes and screens for the wing player. The defender slips the screen (goes between the screen and his teammate defender) to continue guarding his man.

Defensive coverage during down screen.
Coaching Tips
Communication and positioning are keys to defensive success – be sure to stress both during all phases of this drill.