The Kaufman Assessment Battery for Children, Second Edition (KABC-II), is a measure of processing and cognitive ability for children and adolescents between the ages of 3 and 18 years. The KABC-II is a versatile instrument that can be used to assess for intellectual disability, learning disorders, developmental disabilities, more focal neurocognitive impairments, and intellectual giftedness, although it should be noted that the diagnosis of intellectual disability requires additional assessment of adaptive behavior. It can be administered as a complete measure of mental processing and general cognitive ability or more selectively to understand specific neuropsychological functioning. The following sections discuss the history, test structure and scoring, and validity of the KABC-II.