Differentiated instruction is just one component of UDL. Tomlinson (2001), declares that differentiated instruction is the intentional application of specific lesson planning and multiple learning approaches to support all learners. The key difference between differentiated instruction and UDL is that differentiation is a strategy that supports instructors in addressing each student’s individual levels of readiness, interest, and learning profiles (Nelson, 2014). UDL in comparison is an overarching educational framework that addresses the learning environment as a whole. This includes, both the physical learning environment as well as the lessons, units, and/or curriculum. When the whole environment is addressed first, it removes physical, mental and psychological barriers so all students have full access in the classroom, regardless of their needs and abilities. (The Inclusion Lab)