Enrollment
302
Colorado · 2024-25 NCES data
Elementary school (grades K-5) · Durango, CO
Mountain Middle School
Federal NCES profile for Mountain Middle School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 51/100.
2024-25 NCES dataElementary school (grades K-5)NCES 080002006502Charter school
👥 S:T ratio 14
🌟 Gifted program 70
🎓 Counselors 29
📋 Attendance 92
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Mountain Middle School earns 51/100 on the Resource Investment Index, with class sizes larger than 91% of Colorado schools.
- #4 of 15
- public schools in Durango · Resource Index
- 51
- Resource Index · Higher
- 21.6:1
- large classes for Colorado
- 302
- students enrolled
Mountain Middle School has class sizes larger than 91% of Colorado schools. Computed live against every Colorado school reporting to NCES.
By Resource Investment Index, Mountain Middle School ranks #4 of 15 public schools in Durango, CO.
School address
District: State Charter School Institute · Colorado
NCES ID 080002006502 Verify on NCES CCD record →
Teachers (FTE)
14.0
Federal CCD staff survey
Students per teacher
21.6:1
vs 16.6:1 Colorado avg
+30% vs state
Student-teacher ratio in context
How Mountain Middle School compares with Colorado and U.S. medians
What stands out at Mountain Middle School
Mountain Middle School is a mid-sized charter elementary school in Durango, Colorado, enrolling 302 students.
Class loads run heavy: 21.6:1 is larger than about 91% of Colorado schools and 30% above the 16.6:1 state mean, so each teacher carries more students than is typical.
With 302 students, its enrollment sits close to the Colorado median campus size.
Its Resource Investment Index lands in the upper third of 1,922 scored Colorado schools.
Its student body is predominantly White (87% of enrollment) (diversity index 24/100).
Counselor availability sits well past the ASCA benchmark, roughly 355 students sharing each counselor, though short of the most stretched campuses.
Attendance holds up well here: only 3.3% of students were chronically absent, below the typical post-pandemic national figure.
The surrounding State Charter School Institute spends $10,869 per pupil, 33% below the Colorado average, a leaner-resourced district than most.
State Charter School Institute also operates The Pinnacle Charter School (1,905 students) and Academy of Charter Schools (1,887 students) alongside Mountain Middle School.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Mountain Middle School compares
Mountain Middle School on the metrics families compare, against Colorado and U.S. means.
| Metric | This school | vs Colorado | Colorado avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 21.6:1 | ▲ 30% | 16.6:1 | 15.7:1 |
| Enrollment | 302 | top 61% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
21.6:1
Leaner classes than 11% of US schools, heavier class loads than most.
302
Bigger than 33% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Staffing depth
21.6:1
students per teacher
- 30% above state mean
Top 91% in Colorado - lower ratio than 9% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
3.3%
chronically absent (missed 10%+ of school days)
Below 5%, comfortably under the pre-pandemic national baseline for chronic absenteeism.
Funding equity
$10,869
per pupil, district-wide
- below Colorado avg of $16,273
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors0.9 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
2
in-school suspensions + 8 out-of-school
Suspension rate: 0.7 per 100 students. Combined in-school and out-of-school rate: 3.3 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 86.8%
Hispanic or Latino 8.6%
Two or More 2.6%
American Indian / Alaska Native 1.7%
Asian 0.3%
Largest group: White at 86.8% of enrollment.
Student-body diversity index 23.8/100
Simpson diversity index - at 23.8, Mountain Middle School is less mixed than the Colorado school average of 47.1.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for State Charter School Institute, which includes Mountain Middle School.
$10,869
Per student
-33%
vs Colorado
Avg $16,273
-34%
vs U.S.
Avg $16,593
Revenue mix
Local 8.8%
State 81.0%
Federal 10.1%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Mountain Middle School Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| The Pinnacle Charter School | Larger | No free-lunch data | Lower S:T ratio |
| Academy of Charter Schools | Larger | No free-lunch data | Similar S:T ratio |
| Colorado Early Colleges Douglas County | Larger | No free-lunch data | Higher S:T ratio |
| Colorado Early Colleges Fort Collins | Larger | No free-lunch data | Lower S:T ratio |
| Thomas Maclaren State Charter School | Larger | No free-lunch data | Lower S:T ratio |
Comparisons are relative to Mountain Middle School's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,905
- Students per teacher
- 16.7:1
- Resource Index
- 32/100
- Enrollment
- 1,887
- Students per teacher
- 20.5:1
- Resource Index
- 22/100
- Enrollment
- 1,035
- Students per teacher
- 25.2:1
- Resource Index
- 49/100
- Enrollment
- 971
- Students per teacher
- 18:1
- Resource Index
- 52/100
- Enrollment
- 927
- Students per teacher
- 12.4:1
- Resource Index
- 47/100
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of Colorado, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~302 students)
Next steps
Verify locally before acting on Mountain Middle School's federal record.
- Compare Mountain Middle School against another school. Compare schools
- State Charter School Institute's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Mountain Middle School
How many students attend Mountain Middle School?
Mountain Middle School has 302 students enrolled. It is an elementary school in Durango, CO.
What is the student-teacher ratio at Mountain Middle School?
The student-teacher ratio at Mountain Middle School is 21.6:1, which is 30% higher than the Colorado average of 16.6:1 and 38% higher than the national average of 15.7:1.
What is the racial and ethnic makeup of Mountain Middle School?
The largest demographic group at Mountain Middle School is White at 86.8% of enrollment, in Durango, CO.
What is the Resource Investment Index for Mountain Middle School?
Mountain Middle School has a Resource Investment Index of 51/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Mountain Middle School rank among public schools in Durango?
By Resource Investment Index, Mountain Middle School ranks #4 of 15 public schools in Durango, CO. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Durango on the city page.
Is Mountain Middle School a good school?
Mountain Middle School earns 51/100 on the Resource Investment Index, with class sizes larger than 91% of Colorado schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in State Charter School Institute?
Besides Mountain Middle School, State Charter School Institute also operates The Pinnacle Charter School (1,905 students), Academy of Charter Schools (1,887 students), and Colorado Early Colleges Douglas County (1,035 students). See the State Charter School Institute district page for the complete list.
Related tools
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, or report a data error. Data current as of June 2026.