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Not all students are “A students.” Instructors who are troubled by a bell curve of grades in their classes should take heart in the knowledge that such scoring is common and to be expected. In fact, if a large portion of each class receives an A the grade has most likely been diluted and instructors may benefit from revisiting their standards. Letter grades are useful tools when employed to help students understand areas in which they are weak.

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Providing grades as a way to build self esteem is harmful for both the student and the institution. If poor performing students receive an A when their work is significantly inferior to high performing students it is an abdication of instructor responsibility. Worse yet, poor performing students develop a false sense of ability that is likely to cause problems in future classes. Therefore the concept that is the underpinning of each effective grading system is that students must earn what they receive.
The grade that students receive is less important than the feedback that comes along with it but without the grade the feedback is often overlooked. Therefore, an effective grading system helps to shape student behavior by employing the grade and through coaching. This is more successfully deployed when instructors have a significant number of graded assignments throughout the course that students can use as guideposts along the way.
Another essential component of an effective grading system is consistency. Where possible, instructors should use a grading rubric to provide consistent and standardized feedback to students. Well developed rubrics help explain the grade and show students specific areas in which they need to improve.