The Cognitive Assessment System (CAS) is a standardized tool designed to evaluate cognitive abilities in children and adolescents. It focuses on four key areas: planning, attention, simultaneous processing, and successive processing. These areas help identify strengths and weaknesses in a child's cognitive functioning, which can inform educational strategies and interventions. Developed by Naglieri and Das, the CAS is based on the PASS theory of intelligence. This theory emphasizes the importance of understanding how individuals process information. The assessment is typically administered by trained professionals and can be used for various purposes, including diagnosing learning disabilities and guiding educational planning.