Universal Design for Learning (UDL) is an approach to teaching and learning that gives all students equal opportunity to succeed.

Simply the most inclusive approach to teaching and learning - respecting the needs of all students in the class... Not very easy, and discussed in professional discourse with different arguments...

UDL is an inclusive approach of teaching and Learning. CAST has explained UDL guidelines that involve three components-

1. Engagement

2. Representation

3. Action & Expression

With these three components integrated in an instructional and curriculum design can help achieve the learning outcomes at optimal rates.

https://udlguidelines.cast.org/