How Do I Create and Use a Drop Box for Student Submissions
A Drop Box enables students to upload media files to an iTunesU academic site course space that only the instructor can see.
Setting up a Drop Box
After your request for an iTunesU course space has been approved, you will have the option of setting up a "Drop Box" from the Manage Space tool set at Maryland on iTunesU (learningonline.umd.edu/itunesu/manageITunesSpace.jsf).

Access your course space in iTunesU (https://learningonline.umd.edu/media/itunesu). Note that a Drop Box tab has been added to the default "Group One" and "Group Two" tabs. 
How Students Upload Content to the Drop Box
The Drop Box provides a place to which students can upload files that only their instructor can access.
Viewing Student Content in the Drop Box