A Learning Disability is a genetic or organic condition that creates a neurological deficit that impairs the central nervous system. Not at all. In order to be classified as learning disabled, a person must have at least average intelligence. The LD student may process information slower than non-LD students, but with accommodations, she can perform either at their level or better. This is not a question of a limited ability to achieve, but of a different means by which achievement can occur.
ADD is a condition of the parts of the brain that filter stimuli.
A person with ADD is unable to filter out or give appropriate priorities to the stimuli she receives. A person with ADD will find it difficult to focus and concentrate, and too many distractions will render this individual unable to perform high-level thought processes. A person with ADD sometimes also has a Learning Disability, but not always. You are either born with it or have some type of injury or illness that affects certain areas of the brain. Some research and practice suggests that, for some disabilities, a process called auditory integration training can change hearing and learning patterns.