While California Common Core State Standards in Mathematics (CA CCSSM) call for rigorous mathematics for all students, students with disabilities have not been provided equal access to instruction that meets these standards. Universal Design for Learning (UDL) is a research-based framework to develop strategic, expert learners within classroom settings that maximize engagement of a wide variety of students, including students with disabilities. This brief describes how UDL can provide the foundation of mathematics instruction that provides access to rigorous, standards-based mathematics for all students in California.