"Universal design is an approach to designing course instruction, materials, and content to benefit people of all learning styles without adaptation or retrofitting.
Universal design provides equal access to learning, not simply equal access to information.
Universal Design allows the student to control the method of accessing information while the teacher monitors the learning process and initiates any beneficial methods."
-- Ohio State University, US Department of Education Grant
The course and assignments should offer various methods of representation, engagement, and expression.
UDL and heutagogy techniques overlap!
The Ohio State University's Fast Facts on UDL includes these recommendations: