Missouri Department of Elementary & Secondary Education (Special Education): http://www.dese.mo.gov/se/ 
 
The DESE provides information concerning Missouri's public schools and special education services.

Missouri Department of Mental Health, Division of Developmental Disabilities:  http://www.dmh.mo.gov/dd/
American Association of Intellectual & Developmental Disabilities (AAIDD): http://www.aaidd.org
 
Founded in 1876, AAIDD, and formerly known as AAMR, AAIDD, is the oldest and largest interdisciplinary organization of professionals and citizens concerned about intellectual and developmental disabilities.

The Missouri Association of County Developmental Disabilities Services (MACDDS): http://www.macdds.org 
 
MACDDS is a statewide association of county boards for the developmentally disabled dedicated to ensuring quality community supports are available for developmentally disabled individuals.

The Cerebral Palsy Group - https://cerebralpalsygroup.com/

Cerebral Palsy Group is a national organization that was created so that it may serve the individuals and families who have been diagnosed with cerebral palsy.