National Center on Universal Design for Learning
Universal Design for Learning
is a set of principles for curriculum development that give all individuals equal opportunities to learn. UDL provides a blueprint for creating instructional goals, methods, materials, and assessments that work for everyone–not a single, one-size-fits-all solution but rather flexible approaches that can be customized and adjusted for individual needs.
UDL Guidelines: http://www.udlcenter.org/aboutudl/udlguidelines