This document discusses testing accommodations and adaptations for students with diverse needs. It explains that the student population has become more diverse, educational standards require accurate assessment of all students, and federal laws mandate inclusion and equal treatment in testing. The principles of universal design aim to make tests accessible to all students through equitable, flexible design. Factors to consider in providing accommodations include understanding test content and responding abilities, exposure to curriculum, and linguistic and cultural backgrounds. Accommodations are categorized based on their impact on validity, with some having no impact and others potentially or known to affect validity. Recommendations are provided for accommodating students with disabilities or limited English during eligibility testing.