Universal Design for Learning (UDL) is a brain-based set of principles for curriculum development that provides all individuals, including those with diverse learning needs, equal access to learning. UDL provides a flexible approach for creating instructional goals, methods, materials, and assessments that can be used in a variety of settings.
Bannerjee, Rashida and Sundeen, Todd, "Universal Design for Learning" (2012). Teaching, Learning & Assessment. 18.