As a teacher, an iPad with a pencil connected to a classroom projector is so much more clean, wieldy, and resourceful than a laptop/smart-board or just using a regular board with markers. The biggest issue is audio, though. Since apple removed the headphone jack on this model, I've pretty much lost the ability to do audio with visuals in most classroom setups I've encountered.
I currently use an adapter hub with the USB C port which has the HDMI out. There's an additional USB C port on that for charging, but I wonder if a headphone jack could operate out of that. Thanks for the suggestion.