We purchased a cart of 30 iPads for high school students. Our IT guy was able to disable the cameras and some settings so that students can't change the setup. HOWEVER, one student was able to add his/her passcode which kept us out. We aren't able to lock that down. After a call to Apple, they say it can't be done unless we use 3rd party software for blocking--which they didn't know of any. Anyone come across this or have any suggestions? Thanks! They are working well other than this one issue. We bought a Mac Book Pro to sync to all 30 in the cart.