- Enrollment
- 1,193
- Students per teacher
- 20.9:1
- Resource Index
- 44/100
High school (grades 9-12) · Petaluma, CA
Casa Grande High
Federal NCES profile for Casa Grande High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 32/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 063025004715
👥 S:T ratio 13
🌟 Gifted program 30
🎓 Counselors 34
📋 Attendance 50
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Casa Grande High earns 32/100 on the Resource Investment Index, with class sizes near the California median. It is also one of the largest schools in California.
- #4 of 5
- high schools in Petaluma · Resource Index
- 32
- Resource Index · Typical
- 21.8:1
- students per teacher
- 33.1%
- free-lunch eligible
Casa Grande High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Casa Grande High ranks #4 of 5 high schools in Petaluma, CA.
School address
District: Petaluma Joint Union High · California
NCES ID 063025004715 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-79 students YoY
Casa Grande High held near 1,631 students from 2022-23 to 2023-24 (-79 headcount).
Teacher FTE lost 76.9 → 75.1 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-79 students YoY 063025004715 · Petaluma, CA High · MID · TRAD
1,653 enr · 21.8:1 · 33.1% lunch · RII 32
Nearest enrollment peer: Petaluma High (1,193 students)
Casa Grande High held near 1,631 students from 2022-23 to 2023-24 (-79 headcount). Teacher FTE lost 76.9 → 75.1 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Casa Grande High in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- This school
Casa Grande High
1,653 students
- Petaluma High
Petaluma High
1,193 students
- Kenilworth Jun
Kenilworth Junior High
812 students
- Mary Collins C 494
Mary Collins Charter School at Cherry Valley
494 students
- Petaluma Junio 454
Petaluma Junior High
454 students
- Petaluma Accel 115
Petaluma Accelerated Charter
115 students
What this shows Casa Grande High reports 1,653 students on the CCD universe file.
How Casa Grande High compares
Casa Grande High held steady on CCD headcount: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 21.8:1 | ▲ 1% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 33.1% | ▼ 40% | 55.5% | 51.7% |
| Enrollment | 1,653 | top 5% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
21.8:1
Leaner classes than 11% of US schools, heavier class loads than most.
1,653
Bigger than 97% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
33.1%
free-lunch eligible
- 40% 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
21.8:1
students per teacher
- 1% above state mean
Top 51% in California - lower ratio than 49% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
20.1%
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.
Support staff
Counselors5.0 FTE
Per 331 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 44 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 2.7 per 100 students. Reported via the Civil Rights Data Collection. Includes 3 expulsions.
Student demographics
Hispanic or Latino 46.8%
White 41.8%
Two or More 5.5%
Asian 3.6%
African American 1.6%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.3%
Largest group: Hispanic or Latino at 46.8% of enrollment.
Student-body diversity index 60.2/100
Simpson diversity index - at 60.2, Casa Grande High is more mixed than the California school average of 46.0.
Programs
AP courses offered 14
How Casa Grande High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Petaluma High | Smaller | Similar economic need | Similar S:T ratio |
| Kenilworth Junior High | Smaller | Similar economic need | Similar S:T ratio |
| Mary Collins Charter School at Cherry Valley | Smaller | Lower economic need | Higher S:T ratio |
| Petaluma Junior High | Smaller | Similar economic need | Similar S:T ratio |
| Petaluma Accelerated Charter | Smaller | Lower economic need | Higher S:T ratio |
Comparisons are relative to Casa Grande High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- 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
- Enrollment
- 115
- Students per teacher
- 28.8:1
- Resource Index
- 51/100
Similar high schools in Petaluma
4 comparable high schools (grades 9-12) serving the same city.
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
Sonoma Mountain High (Continuation)
Alternative education program
21 students 21:1 students per teacher
Carpe Diem High (Continuation)
Alternative education program
19 students 9.5:1 students per teacher
Nationwide high 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 (~1,653 students)
Frequently asked questions about Casa Grande High
How many students attend Casa Grande High?
Casa Grande High has 1,653 students enrolled. It is a high school in Petaluma, CA. CCD year-over-year: 1,710 (2022-23) → 1,631 (2023-24), nearly flat (-79).
What is the student-teacher ratio at Casa Grande High?
The student-teacher ratio at Casa Grande High is 21.8:1, which is 1% higher than the California average of 21.5:1 and 39% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Casa Grande High?
33.1% of students at Casa Grande High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Casa Grande High?
The largest demographic group at Casa Grande High is Hispanic or Latino at 46.8% of enrollment, in Petaluma, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 60.2/100.
What is the Resource Investment Index for Casa Grande High?
Casa Grande High has a Resource Investment Index of 32/100 (typical 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 Casa Grande High rank among high schools in Petaluma?
By Resource Investment Index, Casa Grande High ranks #4 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.
What other schools are in Petaluma Joint Union High?
Besides Casa Grande High, Petaluma Joint Union High also operates Petaluma High (1,193 students), Kenilworth Junior High (812 students), and Mary Collins Charter School at Cherry Valley (494 students). See the Petaluma Joint Union High district page for the complete list.