There are many resources if you would to educate yourself about ADHD, PTSD, and ASD. These are some of my favorites.

Attention Deficit Hyperactivity Disorder (ADHD)

ADD & ADHD Symptom Tests, Signs, Treatment, Support

Autism Spectrum Disorder (ASD)

Simons Powering Autism Research

Embrace Autism

Post Traumatic Stress Disorder (PTSD)

National Center for PTSD

Cognitive Processing Therapy For Posttraumatic Stress Disorder