Help!  Does anyone know how to create a group from an organizational unit in the Google Apps Admin panel?  We're setting up Google Apps and I have added all the staff of our school into different sections e.g. Secondary, Primary, Kindergarten, Administration.  I would now like to quicjkly set up a group for each of them as well as an 'All Staff' group so that there is a quick way to communicate with a group.  

I have set up a group for each but can' find a way to all the staff quickly without having to manually go through and add them which would be incredibly time consuming.  

Any help greatly received! ?