We have more than one day of training. We start off with classroom training where we going over all the ins and outs, all the rules. I like to have the field/court training 2 days later so the officials have time to let the information sink in and develop questions. We then either have the officials play the sport while rotating if they are officiating or not for minimum an hour depending on the sport. While they are playing they foul on purpose, while doing this they are then able to think about what they would call and are able to have conversation about why they called it as well as have the supervisors and myself(coordinator) critique them in a positive way to help them remember. repetition I believe is key!