learners alternatives for demonstrating what they know, and
* Multiple means of engagement to tap into learners' interests, challenge them appropriately, and motivate them to learn.

Curriculum, as defined in the UDL literature, has four parts: instructional goals, methods, materials, and assessments. UDL is intended to increase access to learning by reducing physical, cognitive, intellectual, and organizational barriers to learning, as well as other obstacles. UDL principles also lend themselves to implementing inclusionary