Universal design for learning (UDL) is a valuable tool for the proactive planning of engaging, accessible lessons in today's diverse classrooms. UDL focuses on three core principles--representation, expression, and engagement--to help educators develop motivating, accessible instruction that will increase the participation of all learners, including those with special needs. Classroom application of UDL includes the use of technology, multiple modalities of instruction, flexible assessment, and group activities to give students choices and provide them with opportunities to empower themselves as learners. Although there is not yet a conclusive body of quantitative research on student outcomes related to UDL, the literature documents benefits that include reduced behavior problems, increased metacognitive knowledge, and improved access to the curriculum for struggling learners.