Universal Design for Learning (UDL) aims to make learning accessible to all students by providing multiple, flexible methods for presentation of content, student expression, and student engagement. UDL is supported by brain research showing learning is distributed across recognition, strategic, and affective networks, which vary between individuals. UDL principles include presenting content through various formats, allowing choice in how students demonstrate understanding, and providing options to engage students. Technology supports UDL by making content versatile, transformable, networked and able to be marked. The CAST organization provides resources for implementing UDL including lesson planning tools.