If you use iTunes U in order to view and listen to courses, you may have noticed that some of those courses have support for closed captioning. For users with disabilities, iTunes U also allows you to turn on closed captioning by default so whenever it's supported, it will use it.
- Launch the Settings app from the Home screen of your iPhone or iPad.
- Scroll down and tap on iTunes U
- Turn On the option for closed captioning.
iTunes U will now obey that setting and implement closed captioning for any lessons or courses that support it.