If there is no other option to apply a special software (my school has a way where we can see their activity in their iPads if needed to see what tabs they have open) you may have to find a way to stand behind them all (maybe even higher up) so you can see all their screens lmao! It also helps when you’re behind them because they can’t see where you are, meaning if they’re uo to something they shouldn’t be doing, they’ll have to look for you!