Standard Score
Assessments & EvaluationsDefinition
A score that indicates how far above or below average a student performs compared to same-age peers. Most standard scores have a mean of 100 and a standard deviation of 15. A score of 85 is one standard deviation below average; a score of 70 is two standard deviations below average.
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Related Terms
A score indicating the percentage of same-age peers that a student scored equal to or higher than. For example, a percentile rank of 25 means the student scored as well as or better than 25% of peers. It does not mean the student got 25% of questions correct.
An assessment that compares a student's performance to a national sample of students of the same age or grade. Results are reported as standard scores, percentile ranks, or age/grade equivalents. These tests help identify whether a student is performing significantly below expectations.
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