Repeating the phrase helps them to hear it. Children who pass a pure tone hearing test can still have difficulty hearing complex speech sounds. Children with this difficulty may learn to read and speak by using flash cards that have both a printed word and a picture of an object. By using these cards they learn to associate the spoken word with the printed word and a picture. My speech therapist helped me to learn to hear speech by lengthening hard consonant sounds.
Some autistic children learn vowel sounds more easily than consonants.
Fixations should be used to motivate schoolwork and education. If a child is fixated on trains, use his interest in trains to motivate reading or learning arithmetic. Have him read about trains or do arithmetic problems with trains. The intense interest in trains can be used to motivate reading. It is a mistake to take fixations away, but the child needs to learn that there are some situations when talking about trains is not appropriate.