There are two ways to project from your iPad, iPhone (4 or later), or iTouch (4th Gen or later):
- Use a VGA/USB or HDMI adapter to connect your device to a projector
- Use AirPlay Mirroring to project wirelessly to a compatible Apple TV device (view minimum requirements)
To use AirPlay: Double-tap the Home button at the bottom of your iPad or iPhone, scroll all the way to right, select AirPlay settings, and select the device you would like to project to (provided that both your AirPlay connected device and your iPad or iPhone are on the same internet network).
For additional information on setting up Mirroring on your iDevice, please view this article from Apple Support.