Here is the study that you need to learn for the core studies exams.
Everything else on this page is extra useful stuff.
You can also find all of the past exam questions on Baron-Cohen's study here.
There is a comprehension exercise here.
There is some interactive stuff too. Here is a multiple choice quiz and here is a match the questions and a match the ages.
The National Autistic Society home page also provides lots of useful information on autism.
The autism research centre is an excellent site to visit. You can also find much more about Simon's work on this site.
The glossary has a brief summary of this study.
You can take Baron-Cohen's 50-question Autism-Spectrum Quotient Test here.