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Grading curves refer to a graph known as a 'bell-curve'. When looking at test grades, most of the time you will see a few low scores, many scores in the middle, and a few high scores. If the average score on a test is, say a 65; the teacher will see a grading curve that shows a few people with 50's, most people with 60's and a few people with 70's. If the teacher thinks this average is too low, they can adjust the grading curve. The teacher can move the average score to a, say 85; that means that a few people have 70's, most people have 80's, and a few people have 90's. In short, the teacher moves the average score up or down depending on how the average score relates to what the teacher feels is an appropriate score.

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Q: What are Grading curves for tests?
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