Jamie,
I agree that after a few years you need to take inventory of how you are presenting your class. When I hire instructors I always hired wonderful people who were experts in their field. However, knowing the information and being prepared to each day to teach was a different story. I know I needed to remind my instructors that they needed to make sure that each day of class was exciting, positive and informative. Teaching occurs when the "light goes on" in a students eyes.
You might want to visit an outside Blog: www.retentionspecialisttoday.infor/blog/