Some important developments relating to education use for Apple TV in the iOS 5.1 upgrade:
Network configuration - Support for setting up advanced network options using configuration profiles. See http://support.apple.com/kb/HT5437 for more information (configure for corporate networks).
Subtitles – SDH support for the deaf and hard-of-hearing as well as improvements to viewing and selecting subtitles.
Stability and performance - Includes general performance and stability improvements.