Karen Erickson has examined the problems that students who rely on AAC face when they are acquiring literacy. These include:
Erikson, K. (2003, June 24th). Reading Comprehension in AAC. The ASHA Leader North Carolina, p67
The acquisition of literacy presents a challenge to many students who have complex needs including those who have normal or even high intelligence. This is partly because the connection between IQ and performance in the curriculum is not so correlated as was once thought. This is particularly so if the student has complex physical and communication needs. A number of factors come into play which can make the acquisition of literacy difficult including:
It is essential that these issues are given direct attention. It is not enough to simply repeat literacy teaching over and again in one style. If it isn't working another approach should be tried. Over learning is not, in itself, enough. It may be that a student needs to repeat a piece of learning several times but it may also be that the teaching style needs to be repeated. There is a link to a number of approaches to learning here.