VOKI for teachers has just launched. free lessonplan database included. fun and engaging
http://www.bestkidsapps.com/
http://iphonekids.com
http://support.apple.com/kb/HT2534
http://ipodtouchclassroom.pbworks.com/
http://web.me.com/thompsonk/digitaltools/iPodTouch.html
goes with the visual dictionary shows connections between words and roots