In this paper, we aim to provide readers with three critical concepts that can maximize inclusivity of learner experience (LX) and user experience (UX) design: accessibility, usability, and universal design for learning (UDL). Although recent K-12 and postsecondary education have experienced rapid change in its student population with the growing awareness of the equal opportunities for all, general design methods of addressing such diversity across formal and informal learning contexts are still prone to retrofitted changes to predefined instructions in favor of standardization. This is due in part to the limited interpretation of accessibility as the concept for the medical model of disabilities where learners with disabilities are not regarded as users or consumers, but as clients or patients. Moreover, LX and UX have been widely designed with the usability of dominant group in mind while trading off exclusion of those who cannot fit themselves into it. However, accessibility and usability are not mutually exclusive; rather, a truly inclusive learning design (i.e. UDL) comes from the interplay between them. Through the paper, we provide definition and description of each concept and provide practical examples of how UDL principles can be applied to inclusive learning design.