The day of the procedure, you will be asked about any serious illness, or previous problems with anesthesia that may affect the procedure. (www2.vet.cornell.edu)
This would ensure that practice problems within a set would be a mixture of previous problem types, and practice for a given topic would be spaced throughout the textbook. (psychologyinaction.org)
For classes you are teaching again, explain previous problems and your strategies to overcome them. (sciencemag.org)