Faculty of any medical residency program will be expected to provide both hands-on clinical training and classroom didactic training to residents. The program director has the responsibility of ensuring that the overall quality of the training residents receive meets and exceeds institutional and practice expectations. While they likely can see some of your experience by looking at your CV, your interviewers want to hear you talk about your experience in classroom lecturing. Talk about the experience you would bring to the table, including any current or prior academic ranks you've held.