Medication Errors: Detection and Prevention

I'm a MAS (Medication Administration Supervisor) at a company that runs multiple group homes for intellectually disabled consumers. I manage the medical care of 35 consumers. This includes instructing the group home staff to give PRN medications (they administer scheduled medications also), be available to take calls from the staff in the group home in case of emergencies, etc. It's run under the Nurse Delegation Program.

The biggest problem that I have come across as a MAS Nurse is trying to prevent medication errors. No matter what I do, the staff in the home just cannot get a grasp on the whole medication administration thing. Because I don't work in the homes directly, I only end up reviewing the MARs at the end of the month, unless a medication is changed.

I have decided that I would like to begin directing the staff to do medication audits on 3rd shift. I was hoping to find a form online to use as an example when I present this suggestion to the administration, but I'm not coming up with any examples. What do you other nursing administrators use to detect and prevent medication errors?