Apple was very savvy when they developed the iPad, considering accessibility features that would help young and old alike. These features would benefit readers and non-readers as well as those who have vision difficulties. Check out what they have included and see what features you may want to use to benefit your students.
If you want your iPad to read to you as you are going along, then you may want to check out this feature. Consider the possibilities for literacy.
Using the Voice Over Feature
Here is the practical how to of using the voice over features with iBooks.