Students who use iPads may run into an issue when attempting to download Word documents after upgrading to iOS 9. Before, when opening a Word document in Safari, an "Open In..." menu would appear and allow the user to open the file in a separate app. Now, however, that menu no longer appears, which means that students will only be able to view the file in Safari itself. (The system-wide share sheet also doesn't offer the option of downloading the file to another app.) 

Here is a temporary workaround: http://forums.macrumors.com/threads/safari-open-in-is-gone.1911623/#post-21765917