“…Specifically within the field of visual impairment, Silberman and Sacks (2007) have emphasized the role of teachers of students with visual impairments in supporting instruction in and the use of AAC for students with visual impairments and additional disabilities. There is a need for further research to examine whether the addition of braille or print to support the development of more formal communication, such as speech or signing, with persons who have visual impairments and additional disabilities has relevance as a compatible instructional strategy to promote both communication and early literacy (Finkel, Weber, & Derby, 2004;Thorley, Ward, Binepal, & Dolan, 1991). An additional unexplored territory with great promise is the use of assistive technology that is designed for persons with visual impairments to promote functional literacy with the population of persons with multiple disabilities (Hasselbring & Glaser, 2000).…”