What is the difference between American Sign Language and Signed English? Is there another name that people refer to Signed English? Is it preferable to teach kids Signed English?
Sign (or signed) languages are not universal languages, nor are they invented ones. They are, like spoken languages, natural languages, grown and transmitted in communities of language users. In the case of sign languages, the cores of these communities are deaf people and their deaf or hearing relatives. Languages constitute one of the most important characteristics of the cultural and psychological identities of various peoples. This process of cultural identification explains why deaf people in the United States use American Sign Language (ASL), deaf people in France use French Sign Language (la Language des Signes Francais), and deaf people in the Netherlands use Sign Language of the Netherlands (Nederlandse Gebarentaal). The structure of sign languages resembles that of spoken languages with their own vocabulary, phonology (albeit in manual form), morphology, syntax, and pragmatics; so ASL is not a form of English.
There are also systems that combine speech and sign according to different rules, and Signed English is one of these (as are Signed Dutch and Signed Polish). These systems differ in the extent to which they represent the lexical and grammatical properties of the spoken language in the sign channel. Some systems are strict, designed to represent the elements of a spoken language 100% in manual components. They manually encode English or Dutch fully, or at least that is the intention.
There are claims that deaf children will learn to read better if they learn a manually-coded form of the spoken/written language (like English), but there is little evidence to support that claim. Although systems like Signed English have the advantage of being more English-like, they do not “hold together” structurally the way natural languages like ASL do. Different children will find different modes of communication easier to master, and one could probably argue either way. ASL is a true language and at the heart of the Deaf community, however, while Signed English is an artificial sign system intended as an educational tool and is not often used in conversation.
Holcomb, T. K. (2013). An introduction to American deaf culture. New York: Oxford University Press.
Marschark, M. (2007). Raising and educating a deaf child, Second edition. New York: Oxford University Press.