Sometimes you can't connect to the Apple TV, or your connection keeps dropping, or the Apple TV you want to connect to isn't showing up in your Airplay list.
Well we have a solution that works sometimes. So, yeah, it may not work every time but it might save you a restart in the middle of class with just a couple clicks.
Go to Self Service, login, and search for Bonjour.
There is a script there called Clean Up Bonjour Cache Script. Click run, and magically all the devices in your Airplay will disappear. They will slowly be added back automatically, hopefully containing the Apple TV you want to connect to. This little script could also be used to try to get the right AirDrop device to show up.