This website offers a description of the The Assessment of Basic Language and Learning Skills – Revised (ABLLS-R), an assessment tool which can be used to guide the language and skills instruction for children with Autism Spectrum Disorder (ASD) and other developmental disabilties. It provides a review of 544 skills from 25 skill areas, such as social interaction, self-help, and motor skills, that most typically developing children acquire before they enter kindergarten.