Nantel is just a way of saying a bunch of standard computer based training.
You get plenty of time to review material.
Re review it if you want.
You cannot have a phone on in the room.
Once signed into an exam you cannot leave your seat for any reason.
The proctor CANNOT help you. Cannot even define a word for you.
Make sure you have a valid picture ID as it will be required.
If you fail there is usually one retake allowed without having to go to management.
Also most areas will have the lesson plans available on paper.