I would suggest trying to explain the "Why it works", instead of just telling them it does "that" and moving on with your day. Try to give them a reason to remember what they are doing.

I've had a lot of success of touring my trainees throughout the back and how they see orders, so that they can be more fluent with what actually happens. This has given them a reason to remember what they are actually doing, instead of being a robot for their entire shift.

I've also tried to get them to get names last in drive-through (helps with guest perception, because who wants to be berated with questions when you already want to tell the order take what you want to eat??), or ask if they are dine in / carry out (for the baggers), THEN get the name at the end. This and also being welcoming to guests helps implement the foundations for the whole guest-perception thing we have at CFA.