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2. CAST (2018). Universal Design for Learning Guidelines Version 2.2.
http://udlguidelines.cast.org
3. Cercone, K. (2008). Characteristics of Adult Learners with Implications for Online Learning Design. AACE Journal, 16, 137-159.
4. Improved Lesson Planning With Universal Design for Learning (UDL)
5. Policies That Support Professional Development in an Era of Reform