There are so many different methods being used for working with children with autism! Just type in "autism and communication" using any search engine, and you'll find thousands of sites. One good site is "www.autism.net"- this is the site for the Geneva Centre for Autism. You have probably heard of ABA. I am working with a child with autism using the principles of this method and it has been very helpful in teaching him communication skills. I have found two books very helpful in implementing this method: One is Teaching Individuals with Developmental Delays by Lovaas (Lovaas is the founder of ABA). I can't remember the name of the other book. In the meantime, try this simple method: show the child an object or a piece of food that he/she likes. Say the word to him- e.g. cookie. He will likely repeat the word. As soon as he does this, give him the cookie. Once he has imitated you saying it and has been rewarded by receiving the cookie a few times, begin placing the cookie in front of him and waiting for him to say cookie. Wait a longer time each trial before saying the word for him. For example, the first time you are trying to have him say it by himself, place the cookie in front of him and count to 7 before saying anything. After 7 seconds, say cookie. When he repeats it, give him the cookie. Then place a cookie in front of him again and this time wait 10 sec,--- and so on. Once he has mastered the one word sentence, use the same method to teach him the three word sentence "I want cookie."