Signing Exact English (a.k.a. SEE1 or SEE sign) is a sign language that follows the structure of the English language exactly as opposed to American Sign Language which has its own unique syntax. SEE sign was developed in response to the problems that many deaf people had learning and reading English: important skills for interacting with mainstream society. Another reason for the development of SEE sign was that hearing parents of deaf children had many difficulties teaching communication skills to their children. Learning an entirely new language fluently prior to a child reaching the optimal language acquisition ages is generally not an easy task. Although SEE sign utilizes approximately 75% of the same vocabulary as American Sign Language, it is also composed of signs that are unique to it. In addition to utilization by the deaf community, developmentally disabled individuals who lack or have inhibited speech capabilities also use Signing Exact English.