Apple TV Settings for the Classroom - Learning in Hand | Didactics and Technology in Education | Scoop.it
If there’s an Apple TV in the classroom, it’s most likely used to mirror teacher and student iPads or MacBooks. There are plenty of other ways to display an iPad on a large screen, and Apple TV is one of the most popular because it has AirPlay. AirPlay is Apple’s technology that will stream a live view of whatever is on an iOS device's screen. This is why Apple TV is so popular. This mirroring ability through AirPlay is built into all iPads (except the first generation iPad) and all newer iPhones and iPod touches.

Via John Evans, Bruno De Lièvre