Book excerpt: With this updated document, IRA and NCTE reaffirm their position that the primary purpose of assessment must be to improve teaching and learning for all students. Eleven core standards are presented and explained, and a helpful glossary makes this document suitable not only for educators but for parents, policymakers, school board members, and other stakeholders. Case studies of large-scale national tests and smaller scale classroom assessments (particularly in the context of RTI, or Response to Intervention) are used to highlight how assessments in use today do or do not meet the standards.