1. Launch the Setting App from the home screen. 

2. Tap on General 

3. Scroll to the bottom and tap Reset. 

4. Tap on Erase all Settings. 

5. Tap on Erase. 

6. Tap Erase again to confirm. 

7. Enter your passcode.

8. Enter your Apple ID password to turn off Activation Lock and remove the device from Find my iPad.