After five years, you will have to renew the substitute license. Download an application for Renewal of the Substitute Teaching License from the Iowa Department of Education Board of Education Examiner's website, print it, and fill it out. This application is different than the application for an Iowa substitute teaching license.
Authorization to do Iowa Substitute Teaching is available to you if you are 21 or older, hold a baccalaureate degree and successfully complete coursework required by the Iowa Board of Educational Examiners.