ITunes U is a wonderful tool for students and teachers. It is a free website where audio and video files can be put up for classroom use or outside the classroom. In iTunes U if you want to allow access only to members of your campus, you can host your own password-protected iTunes U site. This enables you to create and manage the content available on the site, while controlling who can access and download resources from it.
As a teacher, this is a wonderful tool to use with students. The teacher can record the lectures from that day and put them up on their iTunes U site. The student can then see what they missed from the comfort of their own home. However, iTunes U will only be beneficial for the student if the student makes the effort to use it. To find out more about iTunes U visit: http://www.apple.com/education/mobile-learning/