A rubric is a scoring tool used to evaluate and assess a set list of criteria and objectives. Rubrics are often used as a way to evaluate work that is subject to the evaluator's personal feelings, prejudices or interpretations.
Rubrics are typically displayed as a grid. The left-hand column of the grid lists the objectives that are being evaluated. The cells in each row describe, in a few phrases, specific criteria for receiving a low, medium or high score. When given a copy of the rubric prior to an evaluation, the person whose work is being evaluated is able to see exactly what criteria the evaluator will be using to award the highest possible score.