Understanding mental disabilities is a key to helping those who have them. Start with these resources below:
Causes and Prevention of Mental Retardation
Mental Retardation Information
DisabilityInfo.govU.S. Government site for Americans with disabilities.
National Center on Birth Defects and Developmental DisabilitiesClearinghouse of information includes material on living with disabilities.
National Institute of Child Health & Human DevelopmentFacts about Down Syndrome, one of the most common forms of mental disability.
Kid's Quest on Disability and HealthMental disabilities explained for kids.
WeMediaMedia company that covers issues important to the millions of people with disabilities.