Single Purpose Educational Android Tablet

This question is not very technical but I had to ask it somewhere, and this was a promising place to get answers. Please help. I have to provide Educational-Tablets to High-School Students. We want to make sure that those tablets are not misused and only 2 application (developed by us) run on the tablet. I went through many MDM (Mobile Device Management) solutions but none seemed promising. Is there any way (Any Android Native Functionality) to ensure the "Single Purpose Use" of the Tablet?