In 2006, the U.S. Department of Education indicated that more than 1.4 million students were served in the public schools' special education programs under the speech or language<unk>  category of IDEA 2004. This estimate does not include children who have speech/language problems secondary to other conditions such as deafness; this means that if all cases of speech or language<unk> s were included in the estimates, this category of<unk>  would be the largest. Another source has estimated that communication disorders—a larger category, which also includes hearing disorders—affect one of every 10 people in the United States. ASHA has cited that 24.1% of children in school in the fall of 2003 received services for speech or language disorders—this amounts to a total of 1,460,583 children between 3 –21 years of age. Again, this estimate does not include children who have speech/language problems secondary to other conditions. Additional ASHA prevalence figures have suggested the following: * Stuttering affects approximately 4% to 5% of children between the ages of 2 and 4. * ASHA has indicated that in 2006: * Almost 69% of SLPs served individuals with fluency problems. * Almost 29% of SLPs served individuals with voice or resonance disorders. * Approximately 61% of speech-language pathologists in schools indicated that they served individuals with SLI * Almost 91% of SLPs in schools indicated that they servedindividuals with phonological/articulation disorder * Estimates for language difficulty in preschool children range from 2% to 19%. * Specific Language<unk>  (SLI) is extremely common in children, and affects about 7% of the childhood population.
Speech and language impairment
Language delay
Specific language impairment
Motor speech disorders
Language disorder
Nonverbal learning disorder
Speech delay
Infantile speech