Honestly, I had not heard of iTunes university until today. iTunes University is a section of iTunes that provides educational materials from some of the top universities in the U.S. It's easy to use, because you can control how you search. You can search by categories, particular universities, or iTunes search and filter the results to fit you needs. Once you find what you are looking for you can download the material and/or subscribe to receive any new updates.
This is a great way for teachers to incorporate different styles of learning. Also, teachers can send digital lessons to their students, and the students can review the lessons when it's convenient for them. The students just download the lessons to their iPods and can have it with them at all times. This allows students to study more often. Personally, I feel this would help students progress better and have more efficient scores on tests.