Accessible learning and course design removes avoidable barriers so all learners—across abilities, languages, technologies, and contexts—can engage, demonstrate competence, and progress. In the health sciences, accessibility is essential for professional formation, clinical safety, and patient care. It is also an anticipatory practice: designing for variability from the start (e.g., captions, structured documents, flexible assessments) reduces the need for individual retrofits and supports every learner's success.