Dr. Patrick J. Rydell is now a Northern Speech Services, Inc.  author and trainer.  He has two ecourses on Autism Spectrum Disorder

Building the Capactity for Socially Appropriate Conversations in Young Children with Autism Spectrum Disorder (Rydell, 2019)

https://www.northernspeech.com/autism-asperger-syndrome/building-the-capacity-for-socially-appropriate-conversation-in-young-children-with-autism-spectrum-disorder/

Learning Style Profile for Children with Autism Spectrum Disorder: Advanced Training (Rydell, 2019)

https://www.northernspeech.com/autism-asperger-syndrome/learning-style-profile-for-children-with-autism-spectrum-disorder-advanced-training/

These ecourses are designed and applicable for both professionals and parents.  Excellent sources for professional CE credit.  Parents may take the exact same course, but do not have to apply for CE credit.