The field of UDL is confused about the source of power in the intervention. That is, what are the active ingredients in an instructional design that make it universally accessible and usable? The purpose of this resource is to challenge the UDL community to consider a series of constructs that heretofore have been overlooked in conversations about designing instructional materials for diverse learners.

Research has clearly documented that learning from text is the primary instructional model found in most classrooms. The purpose of this resource is to describe a universal design engineering approach known as Design for More Types and how these methods can be applied to the design of text-based learning materials and advance efforts to measure the outcomes associated with various instructional designs.