International Dyslexia Association - Dedicated to the study and treatment of the learning disability, dyslexia. Learning Disabilities Association - Purpose is to advance the education and general welfare of children and adults of normal or potentially normal intelligence who manifest disabilities of a perceptual, conceptual, or coordinative nature. An impairment of the ability to use or comprehend words, usually acquired as a result of a stroke or other brain injury.
Organization promotes public education, research, rehabilitation and support services.
Stuttering Foundation of America - Promotes prevention and improved treatment of stuttering. Distributes over a million publications each year.