I’ve sent this around but here is a public copy of how to add an app to your class iPads through AirWatch from any computer. When the devices turn on the apps will appear. You do not need to be at school for this to work.
When the new app is published, it will pop up on each device.
*You might have a couple of devices that will need the student apple account password entered.
*This does NOT work for paid apps like Pages, Everyday Math, etc.