What are scaled scores in the CommonLit Assessment Series?

This article is intended only for customers and partners using the Assessment Series.

CommonLit reports students’ scores on a scale that runs from 150-250, with higher scores indicating higher student performance. Scaled scores account for both the number of questions students answered correctly and the difficulty level of the questions on the test. This ensures that students’ scores reflect their abilities even if one Assessment Series test is slightly easier or harder than another. Because scaled scores on different tests can be directly compared with one another, they allow educators to measure student growth over time.

Scaled scores help teachers and administrators to identify which students may have struggled with the assessment(s) and which students performed well. These assessments also provide a way to measure students’ growth once they have taken two assessments in the series. The difference in students’ scores is discussed further in this article: How can scaled scores be compared across time?

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