Other forms: rubrics
A rubric is a heading or a category in a chart, or a rule of conduct. A teacher's grading rubrics may include participation, homework completion, tests, quizzes, and papers.
A rubric can also mean a rule or a procedure. If you use "might makes right" as the rubric for the formation of a list of classroom rules, you'll have a different-feeling classroom culture than if your rubric is "everyone deserves respect."