by Apple Inc.
Download this app if: you want to take free courses on your iPhone, iPod Touch or iPad.
iTunes U provides everything an instructor needs to bring their classroom together on iPad—build lessons with apps and your own materials, collect and grade assignments from students, discuss one-on-one or in groups, and annotate PDF assignments.
iTunes U is also the place...
Study and learn — Impressive stuff. There's loads of courses here to take in all manner of subjects from a variety of excellent educational institutions.