Universal Design for Learning (UDL) began as an effort to help learners with disabilities succeed in general education by adapting existing curriculum. Educators realized it was better to design curriculum from the start using UDL principles of multiple means of representation, engagement, and expression. UDL is informed by three brain networks - recognition, strategic, and affective - and provides multiple options to appeal to these networks through representation, expression and engagement. Technology supports effective implementation of UDL by providing flexible tools that appeal to the brain networks.