ABLLS (Assessment of Basic Language and Learning Skills) was created by Dr. James W. Partington, Ph.D., BCBA-D, as an assessment tool, curriculum guide, and skills-tracking system used to help guide the instruction of language and critical learner skills for children with autism or other developmental disabilities. This practical and parent-friendly tool can be used to facilitate the identification of skills needed by your child to effectively communicate and learn from everyday experiences. The ABLLS program provides a comprehensive review of 544 skills from 25 skill areas including language, social interaction, self-help, academic and motor skills that most typically developing children acquire prior to entering kindergarten. The task items within each skill area are arranged from simpler to more complex tasks. Expressive language skills are assessed based upon the behavioral analysis of language as presented by Dr. B.F. Skinner in his book, Verbal Behavior (1957). You can learn more about the ABLLS program by visiting  http://www.partingtonbehavioranalysts.com/page/ablls-r-25.html