Fawn Nguyen

Fawn Nguyen, a middle school math teacher, (@**fawnpnguyen** on Twitter) has a post on her website about a grading issue that leads to some interesting mathematics.

Fawn writes:

Put these numbers in order from least to greatest: 5, 7, 2, 3, 1, 4, 6, 8

The correct order is 1, 2, 3, 4, 5, 6, 7, 8 (you’re welcome) — for a possible score of 8 points. How many points would this response earn?

1, 2, 4, 5, 3, 7, 8, 6

and she then discusses various methods for scoring different answers.

What metrics might we devise to measure the discrepancy between an answer and the correct answer, and assign a grade – perhaps a % – to any given answer?

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