[vkou]

> Were the 3 tests administered on 3 separate occasions, so nobody caught you repeatedly cheating the same way?

I imagine that it would be utterly trivial for two people to nearly-undetectably cheat in this way, by both of them simply writing the other person's name on their exam.

[CoastalCoder]

My impression was that in high school, girls and boys had pretty distinct handwriting.

Not sure if that impression is accurate though, or if it's true of mathematical writing.

[jsnider3]

Yes, high school boys and girls have clearly distinct handwriting.

If you're just filling in bubbles on a scantron, then handwriting isn't very visible and each person can just write their own name on the scantron they're submitting as their own.