We start with a purchased video, Good Manufacturing Practices, Food Safety's in your hands: (Coastal DVD 1-800-767-7703 from the back of the DVD) and then break it down into the individual steps by procedure: Hand washing procedure, Housekeeping Procedure, Cleaning and Sanitization procedure... and the list continues. This allows time for the general "why we do GMP" and then the actual procedures. When we train on procedures we emphasize why we do it and try to bring it back to the food YOU eat.
This is an annual event, with new hires, and when internal auditors/GMP auditors/supervisors/Quality Manager see any evidence of GMP violation (when they are auditing a particular process or procedure they are still evaluating every day activities within the plant or by walk arounds). We make sure to be seen in the plant and to be available for any questions employees need to ask, and to address every anonymous suggestion or request with our staff. Err on the side of overtraining, especially if you can add food and beverages to the training! (We do lunch, breakfast, snacks, beverages and we make it special, either catered or employee selected.)
We also do monthly meetings to let employees know what is going on in the world of food safety: recall of thousands of pounds of product due to a sharpie falling into the blender, new regulation and why it will change our process, and access to external training, Company President will do an informal talk about where and how our ingredients are used in the food chain..
Our last BRC audit: No Findings! This works for us.