http://www.ncld.org/index.php?option=content&task=view&id=452
National Center for Learning Disabilities
Learning disabilities (LD) are specific neurological disorders that affect the brain's ability to store, process or communicate information. This fact sheet provides information on what you should know about LDs and describes the various LDs in a chart format, including dyslexia, dyspraxia, and attention deficit hyperactivity disorder.