- Enrollment
- 156
- Students per teacher
- 17.3:1
- Resource Index
- 31/100
Elementary school (grades K-5) · Petaluma, CA
Cinnabar Elementary
Federal NCES profile for Cinnabar Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 49/100.
2024-25 NCES dataElementary school (grades K-5)NCES 060870013043
👥 S:T ratio 20
🌟 Gifted program 30
🎓 Counselors 98
📋 Attendance 50
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Cinnabar Elementary earns 49/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the smallest schools in California.
- #2 of 25
- elementary schools in Petaluma · Resource Index
- 49
- Resource Index · Higher
- 20:1
- students per teacher
- 81.0%
- free-lunch eligible
Cinnabar Elementary has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Cinnabar Elementary ranks #2 of 25 elementary schools in Petaluma, CA.
School address
District: Cinnabar Elementary · California
NCES ID 060870013043 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-5 students YoY
Cinnabar Elementary shrank from 21 students in 2022-23 to 16 in 2023-24 (-23.8%).
Teacher FTE held 1.0 → 1.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Shrinking CCD campus
-5 students YoY 060870013043 · Petaluma, CA Elementary · SMALL · TRAD
20 enr · 20:1 · 81.0% lunch · RII 49
Nearest enrollment peer: Cinnabar Charter (156 students)
Cinnabar Elementary shrank from 21 students in 2022-23 to 16 in 2023-24 (-23.8%). Teacher FTE held 1.0 → 1.0 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
How Cinnabar Elementary compares
Cinnabar Elementary is a shrinking campus on CCD: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 20:1 | ▼ 7% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 81.0% | ▲ 46% | 55.5% | 51.7% |
| Enrollment | 20 | top 97% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
20:1
Leaner classes than 16% of US schools, heavier class loads than most.
20
Bigger than 3% of US schools by enrollment, a small campus.
Equity indicators methodology
Economic need
81.0%
free-lunch eligible
- 46% above the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
20:1
students per teacher
- 7% below state mean
Top 35% in California - lower ratio than 65% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
20.0%
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
$19,638
per pupil, district-wide
- above California avg of $18,665
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors1.8 FTE
Per 11 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 75.0%
White 20.0%
Two or More 5.0%
Largest group: Hispanic or Latino at 75.0% of enrollment.
Student-body diversity index 39.5/100
Simpson diversity index - at 39.5, Cinnabar Elementary is less mixed than the California school average of 46.0.
Programs
District finance for Cinnabar Elementary reports $19,638 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Cinnabar Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Cinnabar Charter | Larger | Lower economic need | Lower S:T ratio |
Comparisons are relative to Cinnabar Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
Similar elementary schools in Petaluma
6 comparable elementary schools (grades K-5) serving the same city.
Mary Collins Charter School at Cherry Valley
Standard public school
494 students 29.1:1 students per teacher
Loma Vista Immersion Academy
Standard public school
451 students 22.6:1 students per teacher
Sonoma Mountain Elementary
Standard public school
422 students 26.4:1 students per teacher
Corona Creek Elementary
Standard public school
403 students 22.4:1 students per teacher
Grant Elementary
Standard public school
386 students 24.1:1 students per teacher
Meadow Elementary
Standard public school
384 students 24:1 students per teacher
Nationwide elementary 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 (~20 students)
Frequently asked questions about Cinnabar Elementary
How many students attend Cinnabar Elementary?
Cinnabar Elementary has 20 students enrolled. It is an elementary school in Petaluma, CA. CCD year-over-year: 21 (2022-23) → 16 (2023-24), down 5.
What is the student-teacher ratio at Cinnabar Elementary?
The student-teacher ratio at Cinnabar Elementary is 20:1, which is 7% lower than the California average of 21.5:1 and 27% higher than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Cinnabar Elementary?
81.0% of students at Cinnabar Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Cinnabar Elementary?
The largest demographic group at Cinnabar Elementary is Hispanic or Latino at 75.0% of enrollment, in Petaluma, CA.
What is the Resource Investment Index for Cinnabar Elementary?
Cinnabar Elementary has a Resource Investment Index of 49/100 (higher 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 Cinnabar Elementary rank among elementary schools in Petaluma?
By Resource Investment Index, Cinnabar Elementary ranks #2 of 25 elementary schools in Petaluma, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Petaluma on the city page.
What other schools are in Cinnabar Elementary?
Besides Cinnabar Elementary, Cinnabar Elementary also operates Cinnabar Charter (156 students). See the Cinnabar Elementary district page for the complete list.