Information behavior is an important area of conceptual knowledge for reference service providers, as it provides structure for understanding users' information seeking and use. This study explores the extent to which information behavior theories, models, and concepts have been integrated into professional education for reference and information service (RIS) through a syllabus study and textbook review. In addition, the study identifies specific information behavior theories, models, and concepts used in introductory RIS courses. Syllabi for introductory RIS courses taught at North American library and information science programs were analyzed for information behavior content, as were the textbooks required by the syllabi. Results show that about two-thirds of introductory RIS courses include instruction in information behavior theories, models, and concepts. Overall, the most impactful information behavior theories and models from the literature are introduced.