Does anyone have any ideas how to best facilitate a quiet, safe, menchlech atmosphere during lunchtime.  Prizes charts "bribes" are not working.

I find it to be an excellent addition to my class.  As long as the help is consistent and not random when the resource teacher has time or is not working with another student or being used elsewhere in the school for other things.  It is imperative the the classroom teacher be mashgiach over her student's progress whether heshe is in resource or in the regular class.  Resource can be an excellent advantage as long as it is done properly and not used to remove difficult children from the class or for babysitting.