This study intends to deepen the aspects of the deafs' education taking the sign language as fundamental in the educational process. Thus, it will be focused a second grade class of the elementary level in which a deaf student will be introduced. This deaf student uses LIBRAS (Brazilian Sign Language) and he will be accompanied by an interpreter. The focus on the analyses will revert on the role of sign language over the interaction in the classroom aiming at contributing to a discussion of the deafs' education.