This site provides guidelines for UDL Version 2. These guidelines provide teachers and curriculum developers with tools to create lessons that reduce barriers to meet the needs of the diverse learners in their classrooms. It discusses the primary principles guiding UDL, as well as examples and resources for differentiated instruction.
There is also a UDL Training Toolkit for instructors who wish to conduct UDL workshops. And there are two 4-6 hour online training modules to introduce teachers and teacher-candidates to the principles of UDL and UDL lesson developments.