This third volume of the Assessment, Evaluation and Programming System for Infants and Children (AEPS) describes AEPS measurement components for children who are at risk or who have disabilities, from 3 to 6 years of age. Section 1 provides a comprehensive description of the AEPS and how its measurement system functions for children and caregivers. Section 2 presents the actual test items for assessing and evaluating children, with items divided according to their role in fine motor, gross motor, adaptive, cognitive, social-communicative, and pure social domains. Section 3 describes how to involve families in the assessment and evaluation process and offers specific strategies and forms for facilitating this involvement. Appendices contain summarized psychometric information on the AEPS, a series of Individualized Education Plan/Individualized Family Service Plan objectives specifically linked to individual AEPS test items, a set of assessment activity plans, and samples of key forms. (PB)