The single most serious impediment to successful school achievement in general and to learning to read in particular is the deaf child's impaired language function.
Schwartz, J. I. (1978). Teaching Reading to the Hearing-Impaired Child. Reading Horizons: A Journal of Literacy and Language Arts, 18 (4). Retrieved from https://scholarworks.wmich.edu/reading_horizons/vol18/iss4/2