Design justice in education calls for learning environments that confront inequities and prioritize the voices of those historically marginalized in academic spaces. Purposeful curricular choices can foster belonging and shift online learning climates toward more inclusive participation [1]. This perspective aligns with the view that education should be a liberatory practice that challenges dominant norms and affirms learner agency [2]. Together, these ideas position equitable course design as a justice-focused commitment that shapes who participates, who is heard, and who ultimately succeeds in our learning systems.

Online education has undergone a rapid and transformative expansion, moving from a niche alternative to a central pillar of the global educational landscape [3]. Research, including insights from ^[4][5][4,5], highlight the growing trend of online learning and its significant impact on higher education. These findings emphasize the need for institutions to adapt to increasing student demand for online learning, particularly in the wake of the pandemic. This includes developing robust online programs, building necessary infrastructure, and ensuring faculty are equipped to teach effectively in online and hybrid learning environments [6]. While this proliferation has increased access for many, it has also brought into sharp focus the systemic inequities and biases that can be embedded within digital learning environments. As online courses became the primary mode of instruction for millions, it became evident that the uncritical design of these systems could unintentionally disadvantage students from marginalized communities, highlighting a pressing need to adopt a more intentional, critical, and justice-oriented approach to instructional design [7]. Four empirically validated design justice principles that enhance online learning inclusivity for all students are transparent teaching, inclusive design, safe spaces, and accessibility measures [8]. This entry posits that seemingly neutral elements of course design can perpetuate inequities and advocates for applying these principles to advance equity and student agency in digital education.

Recent empirical research underscores the urgency of justice-centered approaches in online education. Post-pandemic studies reveal persistent digital divides that disadvantage marginalized students: Ref. [9] systematic review documented how online learning inequities disproportionately affect students from low-income backgrounds, rural areas, and underrepresented racial groups. Similarly, ref. [10] found that institutional responses to rapid online transition often amplified existing inequities rather than addressing them, with students lacking reliable internet access, appropriate devices, or private study spaces experiencing significantly lower engagement and completion rates. Ref. [11] documented declining engagement among STEM undergraduates during remote learning, with the steepest drops among first-generation college students and students of color. These findings demonstrate that technical access alone is insufficient; online learning environments must be deliberately designed with equity as a central goal. This entry, therefore, has three primary objectives: (1) to trace the emergence and evolution of design justice as applied to online higher education contexts; (2) to identify and synthesize empirically validated principles that promote equity in digital learning environments; and (3) to examine real-world applications, challenges, and future directions for justice-centered online course design. By examining design justice through these lenses, this entry contributes to the growing body of scholarship advocating for transformative rather than merely adaptive approaches to online education.