Book excerpt: This book goes through the changing pattern of various stages of teacher education development in Autism Spectrum Disorder, and then analyses the factors bearing on them. It presents a multifaceted approach in understanding the subject, as well as providing the current practice of teacher development for children with Autism Spectrum Disorder. This book suggests a system of professional development that builds on the principles of implementation science is most likely to lead to the adoption and use of innovations necessary to improve the quality of special education services. Implementation science emphasizes the systematic delivery of evidence-based practices. This book gives hints to educators and serves as a useful reference in the delivery of high quality professional development programmes.