Statistically, adult learners are returning to colleges and universities at a growing rate. However, a number of academic libraries provide instruction designed for the traditional learner often neglecting the adult student. Subsequently, academic libraries are faced with challenges to demonstrate value while accommodating an increasingly diverse student population. Theological libraries can enhance its significance and support adult learners through the provision of web-based instruction. In 1997, Badrul Khan introduced web-based instruction, a revolutionary, hypermedia-based instructional program that applies elements and resources of the Internet. Web-based instruction for adult learners is an interactive touch point in the digital age that can be integrated with information literacy in the theological library. This mixed-method study examined academic librarians’ practices and perceptions on outcomes assessment in web-based instruction for adult learners.