On your iOS device, tap the Dropbox app.
Locate the file you want to submit [1]. Then tap the Options icon for the file [2].
To open the file in the Student app, tap the Open in link.
Tap the Copy to Student icon.
Tap the OK button.
On the Dashboard, tap the name of the course you'd like to view.
Tap the Assignments link.
Tap the name of the assignment.
Tap the Submission tab.
Before submitting the assignment, if you want to view the assignment rubric, tap the Grade tab.
Tap the Turn in link.
Tap the File Upload button.
The shared file appears in your Files menu. Swipe to the left to locate the file [1].
If necessary, you can remove the file to import a new one by tapping the Delete icon [2].
To select the file, tap and hold the file thumbnail or tap the Upload icon [1]. When selected, the file will be highlighted [2]. Tap the Submit link [3].