Some of the more reliable methods for sharing and retrieving student work include this list of suggestions from colleagues:
Showbie - see previous blog entry for details - now with teacher voice-recording facility to feedback on students work :-)
Three Rings - see previous blog entry for details.
You can add your school network drives to this app, allowing you to open and save from your school network to and from a variety of apps. It works well with the iLife suite (Keynote, Pages), Book creator and strip designer.
This is a huge step forward in using shared devices in school, but schools need more apps to have the ability to export the actual project file and not just the final file, that is the book creator file and not just the final ebook.Store and view documents, transferring them easily from any Mac or PC. Supports PDF viewing and full-resolution images. Play music; watch movies; access your cloud storage or download from the internet. The WebDAV file transfer works well on internal wireless networks.
iFiles is also a favourite amongst teachers but some users have reported that on occasions iFiles doesn't always show up in a web browser when trying to upload content into the file structure.
My final app for now is Edmodo, used by many teachers to set assignments and annotate responses. Many schools find that students are happy with this solution as it is cross platform and supports learning with library resources.
Let me know what you decide to use and how it goes!