Enrollment
21
California · 2024-25 NCES data
High school (grades 9-12) · Petaluma, CA
Sonoma Mountain High (Continuation)
Federal NCES profile for Sonoma Mountain High (Continuation), including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 19/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 063025001788
👥 S:T ratio 16
📚 AP courses 10
🌟 Gifted program 30
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Sonoma Mountain High (Continuation) earns 19/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the smallest schools in California.
- #5 of 5
- high schools in Petaluma · Resource Index
- 19
- Resource Index · Lower
- 21:1
- students per teacher
- 52.2%
- free-lunch eligible
Sonoma Mountain High (Continuation) has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Sonoma Mountain High (Continuation) ranks #5 of 5 high schools in Petaluma, CA.
School address
District: Petaluma Joint Union High · California
NCES ID 063025001788 Verify on NCES CCD record →
Teachers (FTE)
1.0
Federal CCD staff survey
Students per teacher
21:1
vs 21.5:1 California avg
-2% vs state
Free-lunch eligible
52.2%
vs 55.5% California avg
-6% vs state
Student-teacher ratio in context
How Sonoma Mountain High (Continuation) compares with California and U.S. medians
What stands out at Sonoma Mountain High (Continuation)
Sonoma Mountain High (Continuation) is a higher-need, small high school in Petaluma, California, enrolling 21 students.
At 21:1, 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.
Its free-meal eligibility rate of 52.2% lands close to the California typical range, neither a high- nor low-need campus by this measure.
This is a small campus: fewer students than 97% of California schools, with 21 enrolled.
Its Resource Investment Index lands in the lower third of 9,998 scored California schools.
Among 77 similarly sized, similarly resourced-need California schools statewide, it ranks #62, in the lower tier once campus size and economic need are matched.
Its student body is led by White (76%) and Hispanic or Latino (19%) (diversity index 38/100).
No Advanced Placement courses are reported for this campus in the federal data.
Among Petaluma's high schools, it stands alongside Casa Grande High (1,653 students): Sonoma Mountain High (Continuation) is smaller than that campus by headcount and runs leaner classes (21:1 vs 21.8:1).
Petaluma Joint Union High also operates Casa Grande High (1,653 students) and Petaluma High (1,193 students) alongside Sonoma Mountain High (Continuation).
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 Sonoma Mountain High (Continuation) compares
Sonoma Mountain High (Continuation) on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 21:1 | ▼ 2% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 52.2% | ▼ 6% | 55.5% | 51.7% |
| Enrollment | 21 | top 97% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
21:1
Leaner classes than 13% of US schools, heavier class loads than most.
21
Bigger than 3% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
52.2%
free-lunch eligible
- 6% below the California average of 55.5%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
21:1
students per teacher
- 2% below state mean
Top 43% in California - lower ratio than 57% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Support staff
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
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.
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 76.2%
Hispanic or Latino 19.0%
Two or More 4.8%
Largest group: White at 76.2% of enrollment.
Student-body diversity index 38.1/100
Simpson diversity index - at 38.1, Sonoma Mountain High (Continuation) is less mixed than the California school average of 46.0.
Programs
AP program Not offered
How Sonoma Mountain High (Continuation) Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Casa Grande High | Larger | Lower economic need | Similar S:T ratio |
| Petaluma High | Larger | Lower economic need | Similar S:T ratio |
| Kenilworth Junior High | Larger | Lower economic need | Similar S:T ratio |
| Mary Collins Charter School at Cherry Valley | Larger | Lower economic need | Higher S:T ratio |
| Petaluma Junior High | Larger | Lower economic need | Similar S:T ratio |
Comparisons are relative to Sonoma Mountain High (Continuation)'s own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,653
- Students per teacher
- 21.8:1
- Resource Index
- 32/100
- Enrollment
- 1,193
- Students per teacher
- 20.9:1
- Resource Index
- 44/100
- Enrollment
- 812
- Students per teacher
- 21.4:1
- Resource Index
- 50/100
- Enrollment
- 494
- Students per teacher
- 29.1:1
- Resource Index
- 37/100
- Enrollment
- 454
- Students per teacher
- 20.6:1
- Resource Index
- 42/100
Similar high schools in Petaluma
4 comparable high schools (grades 9-12) serving the same city.
Casa Grande High
Standard public school
1,653 students 21.8:1 students per teacher
Petaluma High
Standard public school
1,193 students 20.9:1 students per teacher
San Antonio High (Continuation)
Alternative education program
65 students 10.8:1 students per teacher
Carpe Diem High (Continuation)
Alternative education program
19 students 9.5:1 students per teacher
Similar high 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 (~21 students)
Similar student-teacher ratio (~21:1)
Next steps
Verify locally before acting on Sonoma Mountain High (Continuation)'s federal record.
- Compare Sonoma Mountain High (Continuation) against another school. Compare schools
- Petaluma Joint Union High'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 Sonoma Mountain High (Continuation)
How many students attend Sonoma Mountain High (Continuation)?
Sonoma Mountain High (Continuation) has 21 students enrolled. It is a high school in Petaluma, CA.
What is the student-teacher ratio at Sonoma Mountain High (Continuation)?
The student-teacher ratio at Sonoma Mountain High (Continuation) is 21:1, which is 2% lower than the California average of 21.5:1 and 34% 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 Sonoma Mountain High (Continuation)?
52.2% of students at Sonoma Mountain High (Continuation) are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Sonoma Mountain High (Continuation)?
The largest demographic group at Sonoma Mountain High (Continuation) is White at 76.2% of enrollment, in Petaluma, CA.
What is the Resource Investment Index for Sonoma Mountain High (Continuation)?
Sonoma Mountain High (Continuation) has a Resource Investment Index of 19/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Sonoma Mountain High (Continuation) rank among high schools in Petaluma?
By Resource Investment Index, Sonoma Mountain High (Continuation) ranks #5 of 5 high 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 high schools in Petaluma on the city page.
Is Sonoma Mountain High (Continuation) a good school?
Sonoma Mountain High (Continuation) earns 19/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the smallest schools in California. 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 Petaluma Joint Union High?
Besides Sonoma Mountain High (Continuation), Petaluma Joint Union High also operates Casa Grande High (1,653 students), Petaluma High (1,193 students), and Kenilworth Junior High (812 students). See the Petaluma Joint Union High 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.