This site provides information on the role of College of DuPage in teacher preparation and a general overview of the teacher certification process in Illinois. Requirements and accountability have become more rigorous over the past few years. It is important for you to stay current with the ongoing changes once you decide to become a teacher by working with a C.O.D. adviser and an adviser from the transfer institution of your choice. This site is as accurate as possible; however, information is subject to change without notice. Visit our web site often for updates.