Automatically delete data from iPads

[FLG]

Hi, I'm a complete newbie. ;-)
We are using non-shared iPads at our school.
I would like to remove all data (files/photos/videos) that students have stored on the device every night automatically without resetting all data. I couldn't find a way to realize this plan.

[sirsir]

Would be interested in this also.

[Ekiem]

Me, too! That´s a big problem, that students are always taking pictures and forget to delete documents with partly sensitive data...

[XiaoJi]

Me, too! That´s a big problem, our students are always taking pictures and forget to delete documents.

[TexasITAdmin]

We want to hand out iPads to parents for student enrollment.  They will be taking pictures of social security cards, birth certificates, and so on.  It would be great to automatically wipe all the photos off the device every night so PII isn't stored long term.  
Did anyone find any solution to this?