Universal Design for Learning (UDL) are guidelines meant to make learning in the classroom accessible for all learners, not just the majority. The goal of UDL is to utilize a variety of methods for students to engage with and understand course material in a way that best meets his/her unique learning needs. The idea is to remove barriers to learning and provide flexibility. Under this framework, no student is expected to adapt to one style of learning, and no one is stigmatized for requiring certain accommodations because they are offered to the entire class.
An example of UDL in a classroom could be offering a range of assignment options, such as letting students choose to give a presentation, write an essay, or create a video rather than allowing only one specific way to demonstrate mastery of the course material. Another example would be providing captions for videos and offering audiobooks in addition to textbooks.