The video below (hosted by AISD's MyTraining in the AISD Cloud) demonstrates how one can get products from an iOS device and save into the user's Google Drive.
This method does require the user to login to their Google Drive and only one Google Drive can be logged into at a time. For the shared classroom iPad, the teacher will need to establish procedures for the students to follow to effectively save to their Google Drive. A future blog post here will demonstrate a very workable solution for multiple users saving to Google Drive.
Alternatives would include using DropBox, Box or other cloud storage services. Sometimes, the free storage service limits your monthly uploading bandwidth, but Google Drive will not. What alternatives have you used effectively? Share your experiences in the comments below!