Communication is fundamental to participation in everyday life, and communication disorders can significantly limit engagement, inclusion, and opportunity across the lifespan. Focusing on developmental, childhood-onset disabilities, the book supports health and education professionals in understanding the communication and cognitive challenges that can persist across the lifespan and in developing effective responses to them. Grounded in the World Health Organization’s International Classification of Functioning, Disability and Health (ICF) framework, it places participation at the core of assessment and intervention. By examining how personal abilities and environmental contexts interact to either enable or restrict communicative participation, the book moves beyond impairment-based models toward a holistic, person-centred approach. Case vignettes featuring children and adults across diverse disabilities and life circumstances illustrate the real-world complexity of supporting meaningful participation. Throughout, the book emphasizes the importance of interdisciplinary collaboration and advocacy, underscoring how inclusive practices and societal support are essential if individuals with communication disabilities are to thrive, belong, and participate on their own terms.