You might be looking to screen youtube videos, online tv channels, educational games on your tv. You might have tried using your mobile device. However, it does not support flash. To run flash, you first need to download Photon on your device.
Once you download the
Photon Browser for iPhone at https://itunes.apple.com/us/app/photon-flash-player-for-iphone/id453546382?mt=8
Photon Browser for iPad version at https://itunes.apple.com/us/app/photon-flash-player-for-ipad/id430200224?mt=8
you can do the following:
1) Enter Mirroring mode
1) Tap your home bottom on your device twice.
2) Then slide the bottom panel to the right once (for iPad) and twice (for iPhone)
3) There should be a TV like icon next to the volume slider bar on the iPad.
4) Click on it.
5) Select Airplay with Mirroring On.
6) Make sure your Apple TV is on.