High-Functioning Autism

RESOURCES: Understanding Autism

Autism Spectrum Disorder Fact Sheet
Autism Test
I find this one the most useful and the most likely to be accurate.  It is a 50 question test.  It is reasonable to take the test "about" a child or someone else, if you know them well.  Answer the questions while thinking of their behavior.  As always, once you have  the suspicion of Autism, be sure to work with your health care professional. 
CPI - Crisis Prevention Institute
Aspergers Education Services 
Behavioral parent training program (BPT)
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Books

The Bully at Work
The Reason I Jump
Thinking in Pictures
Look Me in the Eye
The Autistic Brain