What is UDL?
Universal Design for Learning
is a set of principles for curriculum [1] development that give all individuals equal opportunities to learn.
UDL provides a blueprint for creating instructional goals, methods, materials, and assessments that work for everyone--not a single, one-size-fits-all solution but rather flexible approaches that can be customized and adjusted for individual needs.
Why is UDL necessary?
Individuals bring a huge variety of skills, needs, and interests to learning. Neuroscience reveals that these differences are as varied and unique as our DNA or fingerprints. Three primary brain networks come into play:
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Recognition Networks
The "what" of learning

How we gather facts and categorize what we see, hear, and read. Identifying letters, words, or an author's style are recognition tasks.
Strategic Networks
The "how" of learning

Planning and performing tasks. How we organize and express our ideas. Writing an essay or solving a math problem are strategic tasks.
Affective Networks
The "why" of learning

How learners get engaged and stay motivated. How they are challenged, excited, or interested. These are affective dimensions.
Source: CAST - What is UDL? (http://www.cast.org/research/udl [5])

Present information and content in different ways
Differentiate the ways that students can express what they know
Stimulate interest and motivation for learning