Am interested in sources of legal music downloads and will investigate these suggestions. Also, in thinking about Grace's work with middle school students and thinking if there are aspects to change/adapt for work with younger children. (some thoughts on sharing songs at home, using other types of audio/media options that might be more affordable than ipods for sharing at home with young children.)
This page offers two lists of apps, "Apps for ASD ipod Touch Project" and "Special Needs Apps" - the first list is broken down into categories like communication, sensory, social skills - lists the apps, a brief description, & the price. It's focused on individuals with Autism Spectrum Disorders, but of course could be useful to many. The second lists the apps & descriptions, but not the cost.
"APPitic is an directory of apps for education by Apple Distinguished Educators (ADEs) to help you transform teaching and learning. These apps have been tested in a variety of different grade levels, instructional strategies and classroom settings"