This document discusses Universal Design for Learning (UDL), which aims to create flexible learning environments and materials that provide alternatives to meet the needs of all learners. It explains that UDL was inspired by universal design in architecture. The three principles of UDL address recognition, strategies, and affect. Technology plays a role in UDL by allowing flexible content. Brain research found learning occurs through the senses, emotions, and behavior via three neural networks. UDL has implications for differentiated instruction, technology integration, accommodating individual students, and removing barriers to learning. Online tools from CAST can help teachers create digital books, lessons, and guide science projects using UDL principles.