Enrollment
135
California · 2024-25 NCES data
Elementary school (grades K-5) · Petaluma, CA
Two Rock Elementary
Federal NCES profile for Two Rock Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 26/100.
2024-25 NCES dataElementary school (grades K-5)NCES 064026006654
👥 S:T ratio 10
🌟 Gifted program 30
🎓 Counselors 33
📋 Attendance 33
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Two Rock Elementary earns 26/100 on the Resource Investment Index, with class sizes near the California median.
- #21 of 25
- elementary schools in Petaluma · Resource Index
- 26
- Resource Index · Lower
- 22.5:1
- students per teacher
- 32.6%
- free-lunch eligible
Two Rock Elementary has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Two Rock Elementary ranks #21 of 25 elementary schools in Petaluma, CA.
School address
District: Two Rock Union · California
NCES ID 064026006654 Verify on NCES CCD record →
Teachers (FTE)
6.0
Federal CCD staff survey
Students per teacher
22.5:1
vs 21.5:1 California avg
+5% vs state
Free-lunch eligible
32.6%
vs 55.5% California avg
-41% vs state
Student-teacher ratio in context
How Two Rock Elementary compares with California and U.S. medians
What stands out at Two Rock Elementary
Two Rock Elementary is a small elementary school in Petaluma, California, enrolling 135 students.
At 22.5:1, its student-teacher ratio sits close to the California median, within a few percentage points of the 21.5:1 state norm, neither notably crowded nor notably small.
Economic need runs somewhat below the state's typical profile, with 32.6% of students eligible for free meals.
Enrollment of 135 puts it in the smaller third of California schools by headcount.
Its Resource Investment Index lands in the lower third of 9,998 scored California schools.
Among 198 similarly sized, similarly resourced-need California schools statewide, it ranks #157, in the lower tier once campus size and economic need are matched.
Its student body is led by Hispanic or Latino (53%) and White (35%) (diversity index 59/100).
Counselor availability sits well past the ASCA benchmark, roughly 338 students sharing each counselor, though short of the most stretched campuses.
Chronic absenteeism is elevated: 26.7% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Its district draws 23.2% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Among Petaluma's elementary schools, it stands alongside Mary Collins Charter School at Cherry Valley (494 students): Two Rock Elementary is smaller than that campus by headcount and runs leaner classes (22.5:1 vs 29.1:1).
Two Rock Union operates only this one school, so Two Rock Elementary has no district-mates to compare against locally.
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 Two Rock Elementary compares
Two Rock Elementary on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 22.5:1 | ▲ 5% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 32.6% | ▼ 41% | 55.5% | 51.7% |
| Enrollment | 135 | top 87% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
22.5:1
Leaner classes than 9% of US schools, heavier class loads than most.
135
Bigger than 13% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
32.6%
free-lunch eligible
- 41% below the California average of 55.5%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
22.5:1
students per teacher
- 5% above state mean
Top 58% in California - lower ratio than 42% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
26.7%
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
$15,784
per pupil, district-wide
- below California avg of $16,509
Close to the U.S. public-school average per-pupil spend.
Support staff
Counselors0.4 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
2
in-school suspensions + 2 out-of-school
Suspension rate: 1.5 per 100 students. Combined in-school and out-of-school rate: 3.0 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
Hispanic or Latino 52.6%
White 34.8%
Two or More 10.4%
African American 1.5%
Native Hawaiian / Pacific Islander 0.7%
Largest group: Hispanic or Latino at 52.6% of enrollment.
Student-body diversity index 59.1/100
Simpson diversity index - at 59.1, Two Rock Elementary is more mixed than the California school average of 46.0.
Programs
Funding & spending
District-wide per-pupil expenditure for Two Rock Union, which includes Two Rock Elementary.
$15,784
Per student
-4%
vs California
Avg $16,509
-5%
vs U.S.
Avg $16,593
Revenue mix
Local 24.8%
State 51.9%
Federal 23.2%
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.
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
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of California, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~135 students)
Similar student-teacher ratio (~22.5:1)
Next steps
Verify locally before acting on Two Rock Elementary's federal record.
- Compare Two Rock Elementary against another school. Compare schools
- Two Rock Union'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 Two Rock Elementary
How many students attend Two Rock Elementary?
Two Rock Elementary has 135 students enrolled. It is an elementary school in Petaluma, CA.
What is the student-teacher ratio at Two Rock Elementary?
The student-teacher ratio at Two Rock Elementary is 22.5:1, which is 5% higher than the California average of 21.5:1 and 43% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Two Rock Elementary?
32.6% of students at Two Rock Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Two Rock Elementary?
The largest demographic group at Two Rock Elementary is Hispanic or Latino at 52.6% of enrollment, in Petaluma, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 59.1/100.
What is the Resource Investment Index for Two Rock Elementary?
Two Rock Elementary has a Resource Investment Index of 26/100 (lower 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 Two Rock Elementary rank among elementary schools in Petaluma?
By Resource Investment Index, Two Rock Elementary ranks #21 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.
Is Two Rock Elementary a good school?
Two Rock Elementary earns 26/100 on the Resource Investment Index, with class sizes near the California median. 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 Two Rock Union?
None reported; Two Rock Union operates only Two Rock Elementary as a public school district in NCES's records.
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.