[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.