I have found that hiding a review is better than announcing one. Usually, reviews are requested before tests and are appreciated. However, in order to review consistantly without the eye rolls, questions thrown out to the students during instruction time generally accomplishes the task. At other times, opinions are elicited with the content: "How do you see such and such from this course?" I try to let review be student directed as much as possible. Are there other examples of covert review that might prove helpful?