State-selected | Academic
ES Weight: 25 percent ELA and 25 percent math
Student growth percentile (SGP) is a measure of student growth that compares a student’s performance over time to that of their academic peers (e.g., students in Illinois who have the same scale score in the prior year). It includes the current year score and up to two prior years’ scores allowing the growth percentile calculation to represent a true growth trend and not just movement up and down from year to year. Individual student growth percentiles range from 1 to 99. A score of 50 represents average or expected growth each year. These scores are averaged to create a school or student group mean student growth percentile (MSGP).
A school or student group’s student growth is scored according to the formula below.
Indicator Points Formula:
[(Subject_MSGP * (20/9)) – 62.2222222221]
Note: An MSGP ≥ 73 earns 100 points and an MSGP ≥ 28 points earns 0 points.
New for 2022!
Change to the indicator: Illinois couldn’t calculate its regular SGP as defined above in 2021 because students were missing a 2020 prior score. Instead, it calculated what is known as a baseline-referenced SGP (bSGP). A bSGP is calculated in much the same way as the regular SGP, but instead of comparing a student’s performance to their academic peers (i.e., students in the same subject and grade with the same prior scale score) from the same academic year, their performance is compared to the performance of their academic peers from a prior academic year, such as 2019, which becomes the baseline. In most years, a state’s mean SGP (always 50) and its mean bSGP (plus 50) will be very close to each other.
Moving forward, Illinois will calculate both an SGP and a bSGP for all students. The SGP will remain the default calculation and scored value for this indicator. But it is possible that over the next several years that, as a result of statewide learning acceleration efforts, the distribution of bSGPs may shift above the mean SGP of 50. In years where this occurs -- the bSGP is the higher SGP score for a majority of students in the state -- this indicator will be scored using the bSGP for all students in the state.
Change to scoring: None. The scoring formula will remain the same. Only the data set used to score the indicator will change.