TUSD employees itinerant teachers of the Deaf and Hard of Hearing and teachers of the Visually Impaired for qualifying students who meet eligibility requirements.
In order to qualify for special education under the regulations that implement the Individuals with Disabilities Education Act (IDEA), a child needs to be a child with a disability, meaning that the child has been evaluated as having a qualifying disability, and by reason thereof needs special education. See the the list of qualifying disabilities on the Arizona Department of Education website.