Assess educators' ability to apply UDL's three principles to adapt K–12 mathematics lesson plans: align learning objectives with grade-level standards; design multiple means of representation, engagement, and expression; propose accessible materials and technology; differentiate instruction for diverse learners (students with disabilities, English learners, gifted learners, varied cultural backgrounds); and create formative assessment and accommodation strategies. Provide brief, grade-band-specific examples (elementary, middle, high school) and justify adaptations with evidence-based UDL rationale.