Windsor Jr & Sr High School
School pathway
Test scores
IAR + ISA 2024-25 . % Proficient (Levels 4-5)What this means: On the IAR + ISA, Illinois's statewide test, about 43 of every 100 students at this school read and write at grade level and about 18 of 100 do math at grade level. Across all Illinois schools, those numbers are about 51 and 38. Reading and writing scores are up about 29 points since 2023, while math scores are up about 8 points.
BeatsExpectations
Demographically-adjusted score · methodologyWhat this means: About 32% of students here test proficient in math and reading, below the roughly 50% typical for Illinois schools with a similar share of low-income students. BeatsExpectations compares each school with others at the same poverty level, not by raw scores, so a school lands here when its results trail those comparable schools, which is not the same as having low scores. A higher-scoring school can still fall in this tier if similar schools score higher still.
7-year change
SY 2017-18 vs SY 2024-25About Windsor Jr & Sr High School
Windsor Jr & Sr High School is a tiny 9-12 campus in Windsor, Illinois, run under Windsor CUSD 1. The school instructs 134 students in grades 7 through 12. Compared to the state average of about 834 students per school, that is 84% leaner than typical.
Within Windsor CUSD 1, which oversees 2 schools and 359 students, Windsor Jr & Sr High School is one campus in the system.
On demographics, Windsor Jr & Sr High School logs that nearly all students (91%) are White; the rest reads as 5% Hispanic, 3% multiracial.
Looking at the economic backdrop, Windsor Jr & Sr High School logs 14 full-time-equivalent teachers, putting the student-to-teacher ratio at about 9.8:1. That figure is tighter than the state norm's 13.8:1 average. About 37% of enrolled students meet the income threshold for free or reduced-price lunch, a commonly cited indicator of low-income enrollment. Set against Shelby County (around 46%), the school's rate is south of typical.
After controlling for student poverty, On a poverty-adjusted basis, Windsor Jr & Sr High School sits in the bottom 10% statewide. Predicted proficiency from the FRL regression is roughly 50.0%; actual is 32.0%, a gap of -17.9 points.
In the area at large, Shelby County reports that median household earnings sit near $72,095, roughly 18% of adults have completed at least a four-year degree, and census figures put the poverty rate at about 6%. In all, Shelby County runs 14 public schools (combined enrollment of about 2,922 students), of which Windsor Jr & Sr High School is one.
Windsor Elem School is the nearest neighboring public school, about 0.5 miles from this campus. Within ten miles, there are 3 other public schools, a sparser pattern than typical urban areas. On composite proficiency, Windsor Jr & Sr High School comes 8th of 8 in the immediate cluster, beneath the nearby-schools average of 48.4%.
The campus sits in a low-density setting.
Looking at the recent track record. Over the past 7-year window, the student count fell 12%: 153 students in 2018 compared to 134 in 2025. White enrollment moved from 98% to 91% across the same window.
On allk12, recent activity here tends to focus on pickup logistics, teacher feedback, and after-school programs. The community welcomes input from current and former families.
Shelby County at a glance
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Related schools
- Windsor Elem School0.5 mi · 225
- Stewardson-Strasburg High School9.8 mi · 143
- Stewardson-Strasburg Elem School9.8 mi · 290
- Okaw Valley Middle School10.1 mi · 124
- Riddle Elementary School10.4 mi · 589
- Shelbyville Kindergarten Center10.6 mi · 78