Turn by Gyro
The VEX Yaw Rate Gyro is a magical device that can measure the rotation of your robot independent of those irritating variables such as wheel slippage, varying surface friction and loose drive train parts. Watch this video for a full explanation of gyros.
Steps:
1. Make sure you firmly attach your gyro sensor to your robot. It is best to mount it high and center, away from the Cortex (to avoid interference).