The risk profiling tool arising from the analysis outlined in this application will provide an easy-to-use process in which children who are identified in the preschool years with concerns about their speech sound development can be scored by early childhood practitioners in terms of their level of risk for persistent SSD. This work will facilitate the provision of intervention, which can be provided early and in a cost-effective manner, and/or referral to specialist services (e.g., Speech and Language Therapy), leading to a reduction in the number of children with persistent SSD and an associated increase in educational attainment, improved peer relationship and lower risk for self-harm in older childhood and adolescence. We anticipate a third stage of impact development in which we will establish a process for roll out of the tool with relevant services and providers for early childcare.