Getting a proper education is the key.  Unfortunately many Autistic children are misplaced in the wrong classrooms.  First of all the classrooms are heavily populated with children and the Autistic child should be in a small classroom with no more than 10 children , too many kids creates a very stressful environment for the child which leads to stress and other emotional disorders. Getting your child diagnosed and taking the letter to the principals office is a start.  You would be surprised to know how many people have Autistic children and are in denial and won't even get their kids diagnosed by a doctor! Instead they continue to send the child to regular classrooms and wonder why the child is getting bad grades. It is so important that we get our kids diagnosed early as age one, and get started early!