Right in front of you
I didn’t think that we would immediately come across one of the methods I used while at school. But here it is. When I had to take an exam, my desk buddy and me would put a sheet of paper with the answer on the back of the chair in front of us.
It may seem practical at first, but you have to be entirely sure that your teacher won’t stand up and look around the classroom from time to time, as some of them do. If you know for sure that they won’t stand up, they will probably not notice that you have the answers right in front of you.