If you are an iTunes U content creator, you won’t have to do much since Apple will be doing the transition. However, Apple recommends that institutions review current iTunes U Collections and remove outdated or unneeded content before the transition happens.
iTunes U pushed a version of Developing iOS 10 Apps with Swift. The free iOS tutorial series from the Stanford School of Engineering has been updated for iOS 10 and the current version of Swift. Reader Rick Allen turned me onto this release, calling it, “a great and free resource,” which seems like a great reason to pass it on. Reviews on iTunes are overwhelmingly good, too. The description says the 14-part course covers UI design, memory management, a model-view-controller paradigm, object-oriented databases, animation, power management, multi-threading, networking, and performance. And it’s free through iTunes U.