Phase 1: Teaching the child to exchange a picture for a desired item. Phase 2: Encouraging the child to initiate communication by traveling to the communication partner. Phase 3: Discriminating between different pictures to choose the correct one. Phase 4: Constructing simple sentences using a sentence strip. Phase 5: Answering questions like "What do you want?" using PECS. Phase 6: Commenting on the environment by using pictures to respond to questions like "What do you see?"
