The term "learning disabilities" is an umbrella term used to describe an array of learning disorders. An individual may have one learning disability or more than one co-occurring learning disability. A learning disability is a life-long neurobiological disorder that affects the manner in which individuals with potentially normal or above average intelligence select, retain and express information. Incoming or outgoing information may become scrambled as it travels between the senses and the brain. In many cases, learning disabilities interfere with the development and use of language and the ability to speak, read, write, spell or perform math calculations. Learning disabilities can impact an individual's self-esteem, education, vocation, socialization and daily living activities.