Aviston School District 21

Aviston School District 21 has one listed school, Aviston Elementary School, which serves prekindergarten through grade 8 and enrolls 462 students. The most important finding is that the school’s 2025–2026 proficiency rates were well above Illinois’s in both all-grades ELA—78% versus 56%—and math—73% versus 40%.

Aviston Elementary is the only school in the district, so there is no separate school leader or trailer to compare; its meaningful benchmark is the state. The school exceeded Illinois in every reported subject and grade: its all-grades advantage was 22 percentage points in ELA and 33 points in math, while science was 12 points above the state in grade 5 and 17 points above in grade 8. Math stands out most relative to Illinois, even though the school’s ELA percentage was higher. SchoolDigger places the school at 179 of 1,737 schools, the 90th percentile, and rates the district 71 of 738 districts, also at the 90th percentile, with five stars.

The school remains ahead, but its advantage narrowed in the latest year-to-year comparisons: all-grades ELA fell 2 points while the state rose 3, and math fell 2 points while the state rose 1. Grade 5 science improved by 1 point, but grade 8 science declined by 5; both state science results rose, narrowing Aviston’s leads. SchoolDigger’s school ranking also shifted from 79 of 2,067 schools and the 96th percentile in 2023–2024 to 179 of 1,737 and the 90th percentile in 2025–2026. As context, chronic absenteeism was 7%, compared with 24% statewide; the student-teacher ratio was 17.1 in 2024–2025, and 6% of students were reported as free/reduced lunch eligible in 2024–2025.