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Understanding the Growth Index

The growth index is a reliable measure of whether students exceeded, met, or fell short of expected growth. This value takes into account the amount of growth the students made as well as the amount of evidence above or below expected growth. Specifically, the growth index is the growth measure divided by its standard error.

Growth Index = Growth Measure รท Standard Error

We divide unrounded growth measures by unrounded standard errors. We round the growth indexes to two decimal places and then assign colors based on how far the indexes are from Expected Growth. Each growth index is represented by a white dot on the effectiveness level bar.