A couple of things..
- Keep them busy! - I dont spend more than 15 minures at a time on anything, I might run the same drill twice but i'll run other drills before going back to it. I rotate drills every 10-15 minutes no matter what, it keeps them on their toes and focused.
- HELPers - You can never have enough, just make sure they are all on the same page. Alot of time parents are affraid to step up because they dont want you to feel like they are stepping on on your toes.
- Split Squad - Split squad is AWESOME, if you have the numbers and the helpers split squad is the way to go. The kids get double the reps, practice is far more efficient and you can always run squad vs squad drills/competitions.
Lastly - Browse the site, This site covers anything and everything you may run into in any situation, There are thousands of collective years of coaching expierence here.