Since their launch in 2002, open educational resources (OER) developed by the Innovative Resources for Instructional Success, better known as the IRIS Center, have become a staple of teacher preparation programs. In the spring of 2019, a survey of users revealed a diversity of ways teacher educators incorporate IRIS Center OERs within their preparation programs. This article describes these innovative applications and presents a snapshot of who IRIS users are and which IRIS Center OERs are most frequently used.