This 2013 PACER Center Action Information Sheet provides tips on how assistive technology can be used to give children with significant disabilities a voice. Communication is a life long learning process that begins at birth. Listening and speaking are important parts of literacy learning. For children with significant disabilities, speech may be slightly or significantly impaired. It is critical to identify a way to give your child access to the words that will help him or her to develop important reading and writing skills and to communicate with others outside of the family.

http://www.pacer.org/parent/php/php-c207.pdf