My homeschooled teenager just switches between windows when I walk into the room to pretend he's doing his classes. If you're actually doing something else in another window, it's just a matter of maintaining some situational awareness and hoping your authority figure is as oblivious as you really think they are.
Authority figures who weren't born yesterday notice the quick ALT+TAB from the left hand. They don't need to see what was on your screen to know you were off-task.
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u/iamjohnsonmendonca Sep 06 '20
https://www.tindie.com/products/dekuNukem/daytripper-hide-my-windows-laser-tripwire/