The EMRN Rubric
The EMRN rubric is a four-level rubric for evaluating student work. It uses a simple flowchart to categorize student work into one of four bins:
The rubric was created by Rodney Stutzman and Kim Race, where it originated as the "EMRF" rubric in a 2004 article in Mathematics Teacher magazine. The only modification I've done other than upgrading the graphic, is to replace "F" ("Fragmentary") with "N" ("Not Assessable"), because in practice, students' association of the letter "F" with "failing" was hard to overcome.
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