Hi Ekeesha, 

Personally, one of my favourite warm-up drills for netball is 3 across, of which I have attached below. This drill really gets your players moving, thinking tactically both in attack and defence. The drill is very intense, therefore I would limit the number of reps - for example, each person having 3 goes at attack and 3 at defence. 

A few of my other favourite drills are 4 Corners or Interception.

These are all good group activities that ensure all players are involved. 

I hope this helps.

3 Across

Description:

Using the width of a third create 3 lines either side of the third (a minimum of 12 players is required for this drill to be effective) 

The first row of 3 (RED) will have one ball and work it to the other side (1, 2, 3)

The ball is passed off to the next set of 3 who will do the same (4)

HOWEVER the 3 players who were just attacking (RED) will now defend the next set of 3 who they just passed the ball too

NOTE: The GREEN players who have just defended will go behind the BLUE and get ready for their turn to attack

Coaching Points:

Each unit of 3 will go from attacking to defending straight away

The attackers should try penetrate space to get free and keep offering for the ball

The defenders should try keep their players up court to slow them down