References

[1] Universal Design for Learning (UDL) 

Rose, David H; Meyer, Anne (2002). Teaching every student in the digital age: universal design for learning.
Alexandria, VA: Association for Supervision and Curriculum Development. ISBN 0-87120-599-8. OCLC 49994086
https://www.cast.org/products-services/resources/2002/universal-design-learning-udl-teaching-every-student-rose

[2] The UDL framework

Orkwis, R., & McLane, K. (1998). A curriculum every student can use: Design principles for student access.
ERIC/OSEP Special Project, ERIC Clearinghouse on Disabilities and Gifted Education, Council for Exceptional Children.
https://eric.ed.gov/?id=ED423654

[3] Competency-based Education (CBE)

Gervais, J. (2016). The operational definition of competency‐based education. The Journal of Competency‐Based Education, 1(2), 98-106.  https://doi.org/10.1002/cbe2.1011