Selectively mute children are at a significant disadvantage personally, socially and educationally. This unique manual emphasises practical assessment and treatment and provides advice and information, filling a significant gap in the availability of suitable resources in this field. It uses an approach based on behavioural principles and a hierarchy of stages of confident speaking originally conceived by Anthony Glassberg. It summarizes relevant literature and theory and provides detailed ideas on assessment and management. It includes case examples, photocopiable material, and a discussion about progress, transfer and discharge. It is written for teachers, clinical and educational psychologists, speech language therapists, child psychiatrists and parents.