Theory is an invaluable tool for public health practitioners and researchers, to ensure that interventions build upon existing knowledge for maximal public health impact. The goal of this course is to provide students with a strong foundation in the primary theoretical perspectives that inform current research and practice in relation to health promotion and public health intervention. The focus will be on critical examination of the strengths and limitations of theories operating at the individual, interpersonal, community, organizational, and system levels. The course will equip students with a theoretical ‘toolbox’ to ground their future work in health promotion and public health intervention.