> "Cheating" was very difficult; copying what another student was writing was hard and not very effective, because unless you could reproduce their whole argument, just taking a sentence or two would not make sense.

In high school we often were given two (or more) sets of problems so we can't copy off each other because people sitting one sit away from each other have different sets.

I remember at least one test where I wrote down problems from both sets (they were verbally dictated by the teacher at the beginning of the test). Then I just solved both and passed the solution to his problems to the classmate sitting behind me (I was asked for this ahead of time by him).

In Poland cheating is frowned upon by teachers and they tried to catch the cheaters but there were no formal systems in place to report or excessively punished cheating (like in USA).