A friend is helping to develop a learning platform for incarcerated people, which will run on android tablets. They're still in the planning phase and the friend mentioned that they were looking into how they could restrict access to some tablet features (ex. camera, internet, certain apps) as these are hard requirements. Apparently there are some services (ex. AirDroid) that can help with that management.

Are there any open source tools or services that are easy enough to use? Even if the tablets can't be manged quite the same way, are there any apps that can simplify the process?