Universal Design for Learning, widely known as UDL, is a framework for creating flexible curriculum and pedagogy that provides access for all students, giving the opportunity to build from their strengths. First introduced in 1998, UDL is centered on three principles: (a) provide multiple means of engagement, (b) provide multiple means of representation, and (c) provide multiple means of action and expression. In applying the framework in K–12 or postsecondary schools, educators first consider the diversity of students, their assets and needs, the barriers that interfere with their success, and then plan lessons that are widely accessible. UDL has close relationship with technology as it provides various ways to present content, engage students, and demonstrate their learning. Research and policy, largely in the United States, support the growth of UDL. Research has created UDL tools like the Strategic Reader, produced recommendations for implementation, and measured efficacy. The National UDL Task Force, a coalition of stakeholder organizations has worked for the integration of UDL principles into local, state, and federal policies. Critiques of the framework note a dearth of empirical evidence and inconsistency in the research. They also help identify a path forward in designing new research and attending to complications in the framework that might better address diversity and bring students to the center.