This text on the assessment of students with disabilities focuses on accuracy in assessment and testing and the need for functional and meaningful assessment practices. The 14 chapters are grouped into 4 major parts. The first part, "An Introduction to Assessment," describes a comprehensive evaluation and discusses the mandatory assessment regulations set forth in the Individuals with Disabilities Education Act. The second part, "Technical Prerequisites of Understanding Assessment," addresses the topics of descriptive statistics, reliability and validity, and norm-referenced assessment. The third part, "Assessing Students," discusses various types of assessment, including: (1) tests of educational achievement; (2) standardized educational diagnostic tests; (3) informal assessment techniques; (4) methods of assessing behavior; (5) measures of intelligence and adaptive behavior; (6) diagnostic instruments that measure language, sensory-motor ability, perceptual development, visual perception, and auditory ability; and (7) methods of assessing infants, toddlers, and preschool children. The fourth part, "Interpreting Assessment for Educational Intervention," offers guidelines for making eligibility decisions and writing educational objectives based on test results. A case study is included. The last chapter contains six partial case studies for students to complete. An appendix contains the "Code of Fair Testing Practices in Education." (Individual chapters contain references.) (DB)