While bilingualism and codeswitching between spoken languages has been studied extensively, investigation into bi-modal (e.g., signed and spoken languages) bilingualism is just beginning. This text provides one approach to understanding the language choices used by American Sign Language and English bilinguals. The text provides a summary of language usage within the American Deaf community. An explanation of Myers-Scotton''s (1993, 2002) Matrix-Language-Frame (MLF) model frames this investigation into language choices made by bi-modal bilinguals. Language choices of two different signed language interpreters in different settings were analyzed. The study supports the applicability of the MLF model to bi-modal bilingual codeswitching. Additionally, it appears that ASL is much less activated when bilinguals use Simultaneous Communication. The book is of interest to researchers interested in bilingualism, and codeswitching specifically. It is especially of relevance to those interested in bi-modal bilingualism and codeswitching.