Hi Melissa:
I completely understand that type of frustration. I've noticed the same thing when a group of students gets near the end of their training.
The one thing I've personally found to break students out of that stagnation is personal stories and anecdotes that are related to what they will be seeing on the job.
Also, having a course in professionalism can sometimes serve to remind the students what they've chosen to be might be helpful as well.
Regards, Barry