Grade-specific · Save Time · Covers All Age Groups · New Content Daily. The Assessment of Basic Language and Learning Skills – Revised (ABLLS-R) is a criterion-referenced assessment designed to identify the strengths and weaknesses of individuals with . The ABLLS ®-R Guide provides information about the features of the ABLLS-R, how to score items correctly, and how to develop Individualized Education Program (IEP) goals and .