Enrollment
44
California · 2024-25 NCES data
High school (grades 9-12) · Sonora, CA
Dario Cassina High
Federal NCES profile for Dario Cassina High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 43/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 063726006307
👥 S:T ratio 41
📚 AP courses 10
🌟 Gifted program 30
🎓 Counselors 91
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Dario Cassina High earns 43/100 on the Resource Investment Index, with class sizes smaller than 90% of California schools.
- #1 of 3
- high schools in Sonora · Resource Index
- 43
- Resource Index · Typical
- 14.7:1
- small classes for California
- 57.8%
- free-lunch eligible
Dario Cassina High has class sizes smaller than 90% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Dario Cassina High ranks #1 of 3 high schools in Sonora, CA.
School address
District: Sonora Union High · California
NCES ID 063726006307 Verify on NCES CCD record →
Teachers (FTE)
3.0
Federal CCD staff survey
Students per teacher
14.7:1
vs 21.5:1 California avg
-32% vs state
Free-lunch eligible
57.8%
vs 55.5% California avg
+4% vs state
Student-teacher ratio in context
How Dario Cassina High compares with California and U.S. medians
What stands out at Dario Cassina High
Dario Cassina High is a higher-need, small high school in Sonora, California, enrolling 44 students.
Classes run notably small here: at 14.7:1, Dario Cassina High is leaner than roughly 90% of California schools and 32% under the state's 21.5:1 norm, more adult attention per pupil than most peers.
Its free-meal eligibility rate of 57.8% 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 94% of California schools, with 44 enrolled.
Its Resource Investment Index outscores 95% of the 9,998 California schools with a score on record, a top-tier result on this measure.
Against 133 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #32.
Its student body is led by White (70%) and Hispanic or Latino (21%) (diversity index 46/100).
No Advanced Placement courses are reported for this campus in the federal data.
Counselor coverage is strong, about 44 students per counselor, inside the American School Counselor Association's recommended 250:1.
Discipline events run high: 23 in- and out-of-school suspensions were reported for 44 students in the 2021-22 Civil Rights Data Collection.
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
Among Sonora's high schools, it stands alongside Sonora High (880 students): Dario Cassina High is smaller than that campus by headcount and runs leaner classes (14.7:1 vs 23.2:1).
Sonora Union High also operates Sonora High (880 students) and Theodore Bird High (65 students) alongside Dario Cassina High.
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 Dario Cassina High compares
Dario Cassina High on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.7:1 | ▼ 32% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 57.8% | ▲ 4% | 55.5% | 51.7% |
| Enrollment | 44 | top 94% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.7:1
Leaner classes than 50% of US schools, a middle-of-the-pack class size.
44
Bigger than 5% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
57.8%
free-lunch eligible
- 4% 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
14.7:1
students per teacher
- 32% below state mean
Top 10% in California - lower ratio than 90% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Funding equity
$14,368
per pupil, district-wide
- below California avg of $16,509
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 44 students, the combined health-and-guidance staffing load for this school.
Discipline context
5
in-school suspensions + 18 out-of-school
Suspension rate: 11.4 per 100 students. Combined in-school and out-of-school rate: 52.3 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
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 69.8%
Hispanic or Latino 20.9%
Two or More 9.3%
Largest group: White at 69.8% of enrollment.
Student-body diversity index 46.0/100
Simpson diversity index - at 46.0, Dario Cassina High is about as mixed as the California school average of 46.0.
Programs
AP program Not offered
Funding & spending
District-wide per-pupil expenditure for Sonora Union High, which includes Dario Cassina High.
$14,368
Per student
-13%
vs California
Avg $16,509
-13%
vs U.S.
Avg $16,593
Revenue mix
Local 68.9%
State 20.6%
Federal 10.6%
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 Dario Cassina High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Sonora High | Larger | Lower economic need | Higher S:T ratio |
| Theodore Bird High | Larger | Similar economic need | Higher S:T ratio |
Comparisons are relative to Dario Cassina High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 880
- Students per teacher
- 23.2:1
- Resource Index
- 30/100
- Enrollment
- 65
- Students per teacher
- 21.7:1
- Resource Index
- 22/100
Similar high schools in Sonora
2 comparable high schools (grades 9-12) serving the same city.
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 (~44 students)
Similar student-teacher ratio (~14.7:1)
Next steps
Verify locally before acting on Dario Cassina High's federal record.
- Compare Dario Cassina High against another school. Compare schools
- Sonora 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 Dario Cassina High
How many students attend Dario Cassina High?
Dario Cassina High has 44 students enrolled. It is a high school in Sonora, CA.
What is the student-teacher ratio at Dario Cassina High?
The student-teacher ratio at Dario Cassina High is 14.7:1, which is 32% lower than the California average of 21.5:1 and 6% lower 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 Dario Cassina High?
57.8% of students at Dario Cassina High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Dario Cassina High?
The largest demographic group at Dario Cassina High is White at 69.8% of enrollment, in Sonora, CA.
What is the Resource Investment Index for Dario Cassina High?
Dario Cassina High has a Resource Investment Index of 43/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Dario Cassina High rank among high schools in Sonora?
By Resource Investment Index, Dario Cassina High ranks #1 of 3 high schools in Sonora, 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 Sonora on the city page.
Is Dario Cassina High a good school?
Dario Cassina High earns 43/100 on the Resource Investment Index, with class sizes smaller than 90% of California 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 Sonora Union High?
Besides Dario Cassina High, Sonora Union High also operates Sonora High (880 students) and Theodore Bird High (65 students). See the Sonora 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.