The third edition of An Activity-Based Approach to Early Intervention is a comprehensive guide to understanding and implementing a naturalistic, coordinated, well-grounded approach to intervention with children from birth to age five. Activity-based intervention (ABI) is designed to help children reach their individual learning and developmental goals and objectives through daily routines and play activities. It links the assessment, goal development, intervention, and evaluation processes and offers a proven, systematic method that enables professionals to effectively use children's own motivations and initiations to individualize instruction and identify meaningful instructional activities.