Autism spectrum disorder appears during the first three years of life and it represents secondary damage the nervous system, specifically motor, perceptual, intellectual, emotional and social damage. The etiology of the disorder is unknown and the name of the spectrum disorder refers to variations in children's abilities that can range from better developed to less developed . The applied behavior analysis and the visual support methods are scientifically based methods, while the method of communication by image exchange is in the phase of proving it's a scientific accuracy, while developmental approach based on individual differences and relationships is a more recent non-scientifically based naturalistic method. In educational institutions it is necessary to adapt their way of work and content to children with disabilities. In order to be able to do this, it is important to get to know the child's intellectual abilities. Religious teachers should be aware that the sacraments of initiation and the content that they convey to typical children cannot be conveyed in the same way to children with disabilities and that they can not ask of them to understand religious truths as typical children do. What they need to do is to convey living faith, bring the atmosphere of God's love and care for them. It is necessary to inform society about autism spectrum disorders and to raise awareness of the importance of integration and inclusion of these children.