This is something that has actually gone on for the past year, maybe even longer. iTunes University, or iTunesU, has been known for hosting classes and tutorials on a varieties of subjects. Everything from basic math to computer programming. They have been know to do a lot of educational features. As it stands now, Apple has decided to limit their service to Apple users only preferably those who only use iOS whether it be on the iPad or iPhone. To bypass this, you can delete your latest version of iTunes on your computer and download an earlier version of iTunes. Anything iTunes version 12.1.3 will suffice. After that, you can download as many subjects as you want.