- Enrollment
- 1,059
- Students per teacher
- 18.9:1
- Resource Index
- 25/100
Other / mixed grade configuration · Decatur, IL
Montessori Academy for Peace
Federal NCES profile for Montessori Academy for Peace, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 29/100.
2024-25 NCES dataOther / mixed grade configurationNCES 171185001398
👥 S:T ratio 40
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 44
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Montessori Academy for Peace earns 29/100 on the Resource Investment Index, with class sizes larger than 70% of Illinois schools. It is also more racially and ethnically mixed than most Illinois schools.
- #1 of 4
- schools in Decatur · Resource Index
- 29
- Resource Index · Lower
- 15:1
- large classes for Illinois
- 586
- students enrolled
Montessori Academy for Peace has class sizes larger than 70% of Illinois schools. Computed live against every Illinois school reporting to NCES.
By Resource Investment Index, Montessori Academy for Peace ranks #1 of 4 schools in Decatur, IL.
School address
District: Decatur Sd 61 · Illinois
NCES ID 171185001398 Verify on NCES CCD record →
NCES CCD universe card
School universe 171185001398 · Decatur, IL Other · MID · TRAD
586 enr · 15:1 · RII 29
Nearest enrollment peer: Macarthur High School (1,059 students)
Resource Investment Index #1 of 4 schools in Decatur. NCES Common Core of Data stamps for this campus. Read with this school → · District book → · Illinois schools → · Find another →
Montessori Academy for Peace in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Macarthur High
Macarthur High School
1,059 students
- Eisenhower Hig
Eisenhower High School
909 students
- Johns Hill Mag
Johns Hill Magnet School
627 students
- This school
Montessori Academy for Peace
586 students
- Dennis Lab Sch
Dennis Lab School
579 students
- Parsons Elemen
Parsons Elementary School
505 students
What this shows Montessori Academy for Peace reports 586 students on the CCD universe file.
How Montessori Academy for Peace compares
Montessori Academy for Peace on the metrics families compare, against Illinois and U.S. means.
| Metric | This school | vs Illinois | Illinois avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 15:1 | ▲ 7% | 14:1 | 15.7:1 |
| Enrollment | 586 | top 22% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
15:1
Leaner classes than 47% of US schools, a middle-of-the-pack class size.
586
Bigger than 71% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
15:1
students per teacher
- 7% above state mean
Top 70% in Illinois - lower ratio than 30% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
22.4%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$15,611
per pupil, district-wide
- below Illinois avg of $18,196
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 586 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 28 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 4.8 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
White 46.2%
African American 31.7%
Two or More 19.8%
Hispanic or Latino 1.4%
Asian 0.7%
American Indian / Alaska Native 0.2%
Largest group: White at 46.2% of enrollment.
Student-body diversity index 64.7/100
Simpson diversity index - at 64.7, Montessori Academy for Peace is more mixed than the Illinois school average of 38.9.
Programs
Funding & spending
District-wide per-pupil expenditure for Decatur Sd 61, which includes Montessori Academy for Peace.
$15,611
Per student
-14%
vs Illinois
Avg $18,196
-12%
vs U.S.
Avg $17,658
Revenue mix
Local 35.3%
State 43.3%
Federal 21.4%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2022-23 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Montessori Academy for Peace Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Macarthur High School | Larger | No free-lunch data | Higher S:T ratio |
| Eisenhower High School | Larger | No free-lunch data | Higher S:T ratio |
| Johns Hill Magnet School | Similar size | No free-lunch data | Higher S:T ratio |
| Dennis Lab School | Similar size | No free-lunch data | Higher S:T ratio |
| Parsons Elementary School | Similar size | No free-lunch data | Higher S:T ratio |
Comparisons are relative to Montessori Academy for Peace's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 909
- Students per teacher
- 16.5:1
- Resource Index
- 16/100
- Enrollment
- 627
- Students per teacher
- 16.5:1
- Resource Index
- 30/100
- Enrollment
- 579
- Students per teacher
- 17:1
- Resource Index
- 16/100
- Enrollment
- 505
- Students per teacher
- 17.4:1
- Resource Index
- 20/100
Similar other schools in Decatur
3 comparable other schools (grades Mixed) serving the same city.
Nationwide other schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~586 students)
Frequently asked questions about Montessori Academy for Peace
How many students attend Montessori Academy for Peace?
Montessori Academy for Peace has 586 students enrolled. It is a public school in Decatur, IL.
What is the student-teacher ratio at Montessori Academy for Peace?
The student-teacher ratio at Montessori Academy for Peace is 15:1, which is 7% higher than the Illinois average of 14:1 and 4% lower than the national average of 15.7:1.
What is the racial and ethnic makeup of Montessori Academy for Peace?
The largest demographic group at Montessori Academy for Peace is White at 46.2% of enrollment, in Decatur, IL. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 64.7/100.
What is the Resource Investment Index for Montessori Academy for Peace?
Montessori Academy for Peace has a Resource Investment Index of 29/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Montessori Academy for Peace rank among schools in Decatur?
By Resource Investment Index, Montessori Academy for Peace ranks #1 of 4 schools in Decatur, IL. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Decatur on the city page.
What other schools are in Decatur Sd 61?
Besides Montessori Academy for Peace, Decatur Sd 61 also operates Macarthur High School (1,059 students), Eisenhower High School (909 students), and Johns Hill Magnet School (627 students). See the Decatur Sd 61 district page for the complete list.
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error. Data current as of August 2026.