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Building-Level Score and PVAAS Average Growth Index
This document describes how PVAAS transforms value-added measures into building-level scores.
The average growth index (AGI) represents growth in the building-level score. We convert the AGI to a 100-point scale for use in the building-level score.
AGI
The AGI is a reliable measure of whether a school's students exceeded, met, or fell short of the growth standard for each tested subject. This value takes into account the amount of growth the students made, on average, as well as the amount of evidence for that measure. Specifically, the AGI is the growth measure divided by the standard error. A separate AGI is calculated for each Keystone content area.
The values displayed in PVAAS reports are rounded, but the values used to calculate AGIs are not. As a result, an AGI might not equal the result of dividing a growth measure by its standard error.
AGIs are color-coded based on the rules for value-added reports.
Growth Color Indicator | Average Growth Index | Interpretation |
---|---|---|
Well Above | 2.00 or higher | Significant evidence that the group of students exceeded the growth standard |
Above | Between 1.00 and 2.00 | Moderate evidence that the group of students exceeded the growth standard |
Meets | Between -1.00 and 1.00 | Evidence that the group of students met the growth standard |
Below | Between -1.00 and -2.00 | Moderate evidence that the group of students did not meet the growth standard |
Well Below | -2.00 or lower | Significant evidence that the group of students did not meet the growth standard |
Building-Level Scale Score
Each AGI is converted to a 100-point scale following these rules.
If the AGI is | The Scale Score is |
---|---|
3.00 or greater | 100 |
Less than 3.00 but greater than or equal to 1.00 | 10 x (AGI + 7), truncated to a whole number |
Less than 1.00 but greater than or equal to -1.00 | 5 x (AGI + 15), truncated to a whole number |
Less than -1.00 but greater than or equal to -3.00 | 10 x (AGI + 8), truncated to a whole number |
Less than -3.00 | 50 |
The following table illustrates the relationship between the AGI, the growth color indicator, and the building-level scale score.
AGI Color Indicator | AGI | Scale Score Conversion Formula | Scale Score |
---|---|---|---|
Dark Blue | 3.00 or higher | Scale Score = 100 | 100 |
Dark Blue | Between 2.00 and 3.00 | Scale Score = 10 x (AGI + 7), truncated to a whole number | Between 90 and 99 |
Light Blue | Between 1.00 and 2.00 | Scale Score = 10 x (AGI + 7), truncated to a whole number | Between 80 and 89 |
Green | Between -1.00 and 1.00 | Scale Score = 5 x (AGI + 15), truncated to a whole number | Between 70 and 79 |
Yellow | Between -1.00 and -2.00 | Scale Score = 10 x (AGI + 8), truncated to a whole number | Between 60 and 69 |
Red | Between -3.00 and -2.00 | Scale Score = 10 x (AGI + 8), truncated to a whole number | Between 50 and 59 |
Red | Less than -3.00 | Scale Score = 50 | 50 |