When the player brings the ball down from above his head he is going to go into the dribble.
Place feet wide apart so the player cannot go past you.
Go two steps back to create a gap and go into a dribble defense mode.
Knees bent, back bent, feet wide and hands down and outwards.
Look wide and intimidating.
Alternate which foot is dropped first.
Do this drill ten times.
This is a quickness drill.
Concentrate on keeping low and quick to create a gap between you and the ball handler so he cannot go around you.
Four players standing still make every ball handler's job harder. Teach V-cuts, L-cuts and back cuts so your team gets open and punishes defenders who overplay.
Good team defence is five players guarding the ball, not five separate one-on-ones. The shell drill is where that starts, so here is how to teach help-side positioning and rotations from the first week of the season.
Rebounding is the least glamorous thing in basketball and one of the most decisive. It is also almost entirely a habit, which means it is entirely coachable.