Speech therapy aims to treat a variety of speech or language disorders. A speech disorder is an issue with the physical ability to produce sound. For instance, a child may have an articulation disorder where syllables are pronounced incorrectly and make it difficult to understand or a fluency disorder which includes stuttering. A language is more cognitive and is an issue with understanding or communicating words and sentences. These can be receptive (difficulties processing language), or expressive (difficulties putting words together or using socially appropriate words). Nearly an estimated 8% of children in the U.S. have a speech related disorder.