Other / mixed grade configuration · Madison, WI
Isthmus Montessori Academy Public
Federal NCES profile for Isthmus Montessori Academy Public, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 31/100.
The verdict
Isthmus Montessori Academy Public earns 31/100 on the Resource Investment Index, with class sizes larger than 97% of Wisconsin schools.
- #32 of 33
- schools in Madison · Resource Index
- 31
- Resource Index · Lower
- 30:1
- large classes for Wisconsin
- 6.3%
- free-lunch eligible
Isthmus Montessori Academy Public has class sizes larger than 97% of Wisconsin schools. Computed live against every Wisconsin school reporting to NCES.
By Resource Investment Index, Isthmus Montessori Academy Public ranks #32 of 33 schools in Madison, WI.
School address
NCES ID 550008203085 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+12 students YoY
Isthmus Montessori Academy Public grew from 208 students in 2022-23 to 220 in 2023-24 (+5.8%).
Teacher FTE added 7.8 → 15.5 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Growing CCD campus
+12 students YoY 550008203085 · Madison, WI Other · SMALL · CHARTER
210 enr · 30:1 · 6.3% lunch · RII 31
Nearest enrollment peer: Fawn Mountain Elementary (210 students)
Isthmus Montessori Academy Public grew from 208 students in 2022-23 to 220 in 2023-24 (+5.8%). Teacher FTE added 7.8 → 15.5 across the same CCD years. Read with this school → · District book → · Wisconsin schools → · Find another →
How Isthmus Montessori Academy Public compares
Isthmus Montessori Academy Public is a growing campus on CCD: ratios and free-lunch share vs Wisconsin and U.S. means.
| Metric | This school | vs Wisconsin | Wisconsin avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 30:1 | ▲ 108% | 14.4:1 | 15.7:1 |
| Free-lunch eligible | 6.3% | ▼ 84% | 38.5% | 51.7% |
| Enrollment | 210 | top 68% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
Equity indicators methodology
Student demographics
Largest group: White at 67.6% of enrollment.
Simpson diversity index - at 50.7, Isthmus Montessori Academy Public is more mixed than the Wisconsin school average of 35.7.
Programs
Similar other schools in Madison
6 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 (~210 students)
Frequently asked questions about Isthmus Montessori Academy Public
How many students attend Isthmus Montessori Academy Public?
Isthmus Montessori Academy Public has 210 students enrolled. It is a public school in Madison, WI. CCD year-over-year: 208 (2022-23) → 220 (2023-24), up 12.
What is the student-teacher ratio at Isthmus Montessori Academy Public?
The student-teacher ratio at Isthmus Montessori Academy Public is 30:1, which is 108% higher than the Wisconsin average of 14.4:1 and 91% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Isthmus Montessori Academy Public?
6.3% of students at Isthmus Montessori Academy Public are eligible for free lunch, compared to the Wisconsin average of 38.5%.
What is the racial and ethnic makeup of Isthmus Montessori Academy Public?
The largest demographic group at Isthmus Montessori Academy Public is White at 67.6% of enrollment, in Madison, WI. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 50.7/100.
What is the Resource Investment Index for Isthmus Montessori Academy Public?
Isthmus Montessori Academy Public has a Resource Investment Index of 31/100 (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 Isthmus Montessori Academy Public rank among schools in Madison?
By Resource Investment Index, Isthmus Montessori Academy Public ranks #32 of 33 schools in Madison, WI. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Madison on the city page.
What other schools are in Isthmus Montessori Academy Inc.?
None; Isthmus Montessori Academy Inc. is a single-school charter district, and Isthmus Montessori Academy Public is its only campus.