I have a nephew who is autistic, and he has done fairly well at school in a specially-structured program. The teachers are very patient, and use techniques that are tailored towards his needs. However, I don't think that he would be doing as well as he is without his parents' close attention to his classroom setting and curriculum.
Though it is important that all parents are involved in their children's education, parents of autistic children must be extra vigilant. By staying in touch with educators, observing these children at school, and addressing problems when they occur, the parents of autistic children will help ensure that their kids progress and learn.