When I taught, I would sort graded papers/tests using quick sort. Put all the a–l in on pile and m–z in the other, then do each pile into halves and manually so

When I taught, I would sort graded papers/tests using quick sort. Put all the a–l in on pile and m–z in the other, then do each pile into halves and manually sort the quarters. And since I knew what the sorted set looked like, finding pívot points was trivial.