Note: Wikispaces and Blogspot Web sites may be blocked by some schools' filters.

Top Thirteen (15?) Free iPad Apps for Music
http://brandtschneider.blogspot.com/2011/03/top-thirteen-free-ipad-apps-for-music.html

teachwithyouripad - Music Class Apps
http://teachwithyouripad.wikispaces.com/Music+Class+Apps

iPad Music Apps
http://www.ipadmusicapps.ca/

Article on use of Singing Fingers app:
http://tuesdaymusic.wordpress.com/2012/01/11/ipad-apps-in-the-music-classroom-singing-fingers/

See second video (scroll down) on use of Camera app on iPad to analyze music student's technique:

http://www.as.ua.edu/ipad/category/use-case/