Betty R. Hasselkus, PhD, OTR, FAOTA, has influenced the thinking, actions, and direction of the occupational therapy profession through her exemplary research, teaching, practice, and service. Her work illuminates the nature of everyday occupational experience and the lived experience of engaging in meaningful activities. Hasselkus’s work consistently focused on the meaning of doing and the role of occupational therapy in supporting participation and engagement in everyday activities. She was Editor of AJOT from 1998 to 2003, introducing the Evidence-Based Practice Forum. Her scholarly career includes over 90 publications in journals and texts. In 2005, she received the Eleanor Clark Slagle Award. Read Hasselkus’s Slagle Lecture.