"Reflector is an Airplay receiver program for your computer that allows you to both mirror and record your iPad/iPhone screen. If the computer is connected to a projector, an entire class will be able to view on the screen exactly what is being done on the device in real time, with zero lag time. There are countless possibilities of what can be achieved with this program. With the enormous advance of iPads in the education sector, Reflector will be an incredible tool for all iPad educators."
Via John Evans