IAR + ISA + HS Assessment, SY 2024-25
All grades, all students. % Proficient (Levels 4-5).English Language Arts
67.1%
State avg 51.0%
District avg 67.1%
County avg 47.5%
+14.8pp since 2023-24
Mathematics
37.6%
State avg 37.9%
District avg 37.6%
County avg 33.7%
+15.8pp since 2023-24
Science
38.0%
State avg 40.3%
District avg 38.0%
County avg 34.2%
-8.9pp since 2023-24
What this means: On the IAR + ISA + HS Assessment, Illinois's statewide test, about 67 of every 100 students at this school read and write at grade level, about 38 of 100 do math at grade level, and about 38 of 100 are at grade level in science. Across all Illinois schools, those numbers are about 51, 38, and 40. Reading and writing scores are up about 15 points since 2023, while math scores are up about 16 points and science scores are down about 9 points.
BeatsExpectations
Demographically-adjusted score · methodologyTier
OUTPERFORMING
Top 10% of IL schools after controlling for student poverty
Actual proficiency
47.9%
composite math + reading, all grades
Predicted
25.1%
based on IL schools with similar FRL share
Beats by
+22.8pp
above demographic expectation
What this means: About 48% of students here test proficient in math and reading, well above the roughly 25% typical for Illinois schools with a similar share of low-income students. BeatsExpectations ranks schools against others at the same poverty level, not by raw scores, so a school can post high scores and still fall short of its prediction, or post lower scores and still beat it. This school clears its prediction by about 23 points, placing it in Illinois's top 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual.
How this is calculated →What is IAR + ISA + HS Assessment?
Illinois public-school students in grades 3 through 8 take the Illinois Assessment of Readiness (IAR) in English Language Arts and Math each spring. The Illinois Science Assessment (ISA) is administered at grades 5, 8, and 11. High school students take the SAT (or PreACT in current administrations) as the state accountability assessment.
What does "% Proficient (Levels 4-5)" mean?
It is the percentage of students at the school who scored at Level 4 ("Met Expectations") or Level 5 ("Exceeded Expectations") on the IAR 5-level scale. Levels 4 and 5 signal the student is performing at grade level or above. A higher number is better.
What does 67.1% mean for English Language Arts at Horizon Science Acad-McKinley Pk?
It means about 67.1 percent of students tested at Horizon Science Acad-McKinley Pk performed at grade level or above on the IAR + ISA + HS Assessment English Language Arts test in 2024-25. The statewide average for Illinois that year was 51.0%. The other students fell into the lower performance levels.
How is the state average calculated?
It is a weighted average, not a simple average of each school's number. We multiply each public school's score by how many of its students tested, add those together for all schools in Illinois, and divide by the total students tested that year. This way a big school with 1,500 students counts more than a small school with 50 students, which is the right way to ask "how did the typical student do this year?". District and county averages on this page use the same method, just scoped to that district or county.
Where does this data come from?
Illinois State Board of Education (ISBE), Report Card Public Data Set. Illinois Assessment of Readiness (IAR) for grades 3-8 ELA + Math, Illinois Science Assessment (ISA) at grades 5, 8, 11, plus the SAT / PreACT high-school assessment. Headline metric is the cumulative "Proficient" rate (Levels 4 + 5 on the IAR 5-level scale).
How often is it updated?
IAR + ISA + HS Assessment is administered once a year (spring). Results are released by the state in the summer or early fall. We refresh this page after each annual release.
