Can I transfer a license of one of your iOS apps from one device to another?

According to support information available from Apple, it is possible to retain control of app licenses and distribute them to other students when the student moves on. This applies to licenses purchased through the Volume Purchase Program.

For the latest on this program, see:
http://www.apple.com/education/volume-purchase-program/faq.html#ownership

The Volume Purchase Program is an Apple initiative. For more on using it in your school, please contact Apple or your local Apple educational sales representative.