"In a previous blog entry, Collect Student Work Easily on the iPad http://www.mguhlin.org/2013/01/collect-student-work-easily-setup-your.html ; I shared how easy it was to collect student work from iPads using two free apps, Readdle's Documents and WebDAV Nav. At the time, I moved quickly to put together a solution that would address the problem. However, working a colleague, I found myself transferring files from one iPad to another with only the Readdle Documents app! The process was so easy, I promptly showed my colleague and then other iPad-wielding educators."
Via John Evans