I have been working at Nashua Schools (More than 10 years) Pros Large District so there are more opportunities for teachers to take on projects than smaller districts.
And many people with Autism do suffer from a form of Mental Retardation. For some reason I believe people feel better the more they can separate the two conditions and believe somehow it is better to have Autism non related to mental retardation.
Of all cognitive disabilities, only about 3 to 4% of children have a severe cognitive disability. Intellectual disabilities, also known as developmental delay or mental retardation, are a group of disorders defined by diminished cognitive and adaptive development. Affecting more males than females, they are diagnosed in between one and three percent of the population.