A quick note on iOS 12 for staff and student iPads:

iOS 12 has changed the Quick Gestures on the iPad to resemble the iPhone X's interface. Swiping up from home key to camera will bring up the list of active Apps on the iPad but it will not show the Airplay, Volume, and other settings previously available on that screen.

In order to pull up that interface you must swipe down from the battery icon.  Pulling down from any other part of the screen with produce the search bar.  

Here is a quick video on the iOS 12 iPad Gestures if you are not familiar with them.