Once upon a time in libraries, you could call yourself a good teacher if you spent more than 30 minutes planning a lesson, if you wowed students with your search savvy, or if nobody fell asleep during your presentation. With the growth of instructional initiatives and influence across libraries of all kinds, however, expectations for librarians to develop teaching expertise have heightened. Librarians who teach now find themselves faced with the demand to connect with students, to make libraries and information literacy knowledge meaningful, and to create learning opportunities that are memorable and long-lasting. Such a shift in expectations calls for teacher behavior that is purposeful, mindful, and rooted in the self. Transformation of this sort does not come easy, nor does it happen magically. For those in search of a true teacher identity, authenticity will serve as the best guide.