start with the basics...ball passing and catching drills, footwork drills,court positions, and basic strategies ie spreading out.

these are your foundations...once they can catch and throw and run onto the ball, you can introduce preliminary moves (getting away from your player), basic defence (in front defence) and shooting drills.

from there you might think about teaching channels (to keep the court open everyone has a certain channel on the court they are in and move between), rebounding, more defence (ie outside arm), defending every pass, circle movement between the shooters, intercepting.

that should at least get you started.  just think about all the things you have learnt over the years, and break down what you know about netball and how and why you do it.

this is an awesome age group to be coaching.