Originally Posted by BrynleeJean:
if its because of your age group range, i don't think theres too much you can do expect just be consistent. set it in your mind that only for this next two weeks is it going to be this unruly because we are going to do some training these next few weeks. have the older ones maybe learn raising hands, its not gonna work the first 10 mins or first hours or day or first week probably, but by the second week it should just stick and become second nature. once you train the older ones it should be easier cuz the youngers will follow the lead of the olders.
be consistent. be super redundant until you annoy yourself and your gonna pull your hair out, then your half way there 
GOOD LUCK!
We also teach raising hands, some kids do better with this while others seem to do better with touching your wrist. Honesty, whatever works for each kid... go for it!