Teachers are rarely given what they truly need: a comprehensive framework for understanding how young learners think, process, and develop-and how to support those who struggle.Bridging Ability, Disability, and Cognitive Growthaddresses this need by placing cognitive development directly in educators' hands through the Unified Development Continuum (UDC). Dr. Myung-Sook Koh presents child development as an interconnected hierarchy of cognitive systems rather than a collection of symptom-based profiles. Moving from foundational processes-sensory integration, attention, and perception-through advanced competencies such as abstract reasoning and executive function, and into integrated domains including social-emotional cognition, language, and literacy, the UDC demonstrates how cognitive systems build upon one another to form functional intelligence. Each continuum is paired with sequenced, classroom-ready diagnostic instruction, enabling educators to identify cognitive barriers early and respond with targeted, developmentally aligned strategies. Essential for early childhood and special education professionals, this book equips pre-service and in-service teachers, learning coaches, and caregivers to shift from static testing toward responsive diagnostic teaching that supports diverse learners.