UDL focuses on three guiding principles to make the material universal and flexible so that is accessible for all. The three principles of UDL are Provide multiple means of representation, Provide multiple means of expression, and Provide multiple means of engagement.
In other words each student learns in an idiosyncratic fashion, so there isn't just one way for a learner to obtain/learn the content, demonstrate knowledge of the content, and be be motivated to learn the content. This approach to learning is supportive, student centered, and meets the complex needs of all learners.
This helped me realize that a one size fits all approach to learning is a disservice to students. I will particularly pay more attention now to students having more than one mode of expression.
Picture found at
https://assistivetechnologytidbits.wikispaces.com/file/view/udl_pic.png/35294157/372x257/udl_pic.png
Reference Below
http://udltechtoolkit.wikispaces.com