Here's what you have to do if you've forgotten the Guided access passcode you previously chose.
- Let the iPad power down by depleting its battery.
- Charge the iPad so that it's turned on again.
- Open Settings on the device.
- Choose General in the left menu.
- Choose Accessibility in the menu to the right.
- Choose the alternative Guided Access.
- Choose the alternative Set passcode.
- Set a new four-digit code. Important! Remember to write down the code.