The "Bader Reading and Language Inventory" presents a much-needed, highly authoritative model for ensuring K--12 readers' growth, assessing the effectiveness of specific reading approaches, and diagnosing a wide range of literacy needs. In it, teachers, teachers of adult students, reading specialists, and clinicians get a flexible approach to carrying out every aspect of effective reading and learning assessment-from a quick screening through a comprehensive reading assessment. Included are personal interviews and student reflection, observations, informal and formal tests, and diagnostic teaching, plus valuable research-based tools and guides that complement the assessment model and provide a balance of assessment practice that doesn't over-test students.