To mirror your iPad to your Apple TV you have to make sure the iPad and TV are connected to the same Wi-Fi network. From that point, walk through the following steps:

  • Double tap the Home button to bring up the apps list popup menu.
  • Swipe through the apps until you see the AirPlay Mirroring icon.
  • Choose the AirPlay Mirroring icon and when you see your Apple TV, check the mirroring option.

Resource: iPad Insight