Recently I presented about some ways to incorporate Visual Literacy with an iPad at the recent Apps Galore joint Mini-Conference (BCE and Lutheran Education).
These resources can be found here.
iPhone App for the session
Visual Literacy resources (JSSALC wikispaces)
Additionally, the Glean website has some excellent resources to support the development of literacy skills in its various forms.
Glean Learning Tools are free information literacy, data literacy and math teaching tools produced by Public Learning Media, Inc.