Enrollment
192
California · 2024-25 NCES data
High school (grades 9-12) · San Marcos, CA
Twin Oaks High
Federal NCES profile for Twin Oaks High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 41/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 063488005891
👥 S:T ratio 62
📚 AP courses 10
🌟 Gifted program 70
🎓 Counselors 62
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Twin Oaks High earns 41/100 on the Resource Investment Index, with class sizes smaller than 96% of California schools.
- #1 of 5
- high schools in San Marcos · Resource Index
- 41
- Resource Index · Typical
- 9.6:1
- small classes for California
- 61.3%
- free-lunch eligible
Twin Oaks High has class sizes smaller than 96% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Twin Oaks High ranks #1 of 5 high schools in San Marcos, CA.
School address
District: San Marcos Unified · California
NCES ID 063488005891 Verify on NCES CCD record →
Teachers (FTE)
20.0
Federal CCD staff survey
Students per teacher
9.6:1
vs 21.5:1 California avg
-55% vs state
Free-lunch eligible
61.3%
vs 55.5% California avg
+10% vs state
Student-teacher ratio in context
How Twin Oaks High compares with California and U.S. medians
What stands out at Twin Oaks High
Twin Oaks High is a higher-need, mid-sized high school in San Marcos, California, enrolling 192 students.
Classes run notably small here: at 9.6:1, Twin Oaks High is leaner than roughly 96% of California schools and 55% under the state's 21.5:1 norm, more adult attention per pupil than most peers.
Its free-meal eligibility rate of 61.3% lands close to the California typical range, neither a high- nor low-need campus by this measure.
Enrollment of 192 puts it in the smaller third of California schools by headcount.
Its Resource Investment Index outscores 91% of the 9,998 California schools with a score on record, a top-tier result on this measure.
Against 517 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #81.
Its student body is led by Hispanic or Latino (63%) and White (23%) (diversity index 55/100).
No Advanced Placement courses are reported for this campus in the federal data.
Counselor coverage is strong, about 192 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 54.7% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
Among San Marcos's high schools, it stands alongside San Marcos High (3,067 students): Twin Oaks High is smaller than that campus by headcount and runs leaner classes (9.6:1 vs 24.5:1).
San Marcos Unified also operates San Marcos High (3,067 students) and Mission Hills High (2,751 students) alongside Twin Oaks 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 Twin Oaks High compares
Twin Oaks 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 | 9.6:1 | ▼ 55% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 61.3% | ▲ 10% | 55.5% | 51.7% |
| Enrollment | 192 | top 83% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
9.6:1
Leaner classes than 91% of US schools, among the more generously staffed nationally.
192
Bigger than 19% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
61.3%
free-lunch eligible
- 10% 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
9.6:1
students per teacher
- 55% below state mean
Top 4% in California - lower ratio than 96% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
54.7%
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
$13,965
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 192 students, the combined health-and-guidance staffing load for this school.
Discipline context
3
in-school suspensions + 9 out-of-school
Suspension rate: 1.6 per 100 students. Combined in-school and out-of-school rate: 6.3 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 62.5%
White 23.4%
Asian 5.7%
Two or More 4.7%
African American 3.1%
Native Hawaiian / Pacific Islander 0.5%
Largest group: Hispanic or Latino at 62.5% of enrollment.
Student-body diversity index 54.8/100
Simpson diversity index - at 54.8, Twin Oaks High is more mixed than the California school average of 46.0.
Programs
AP program Not offered
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for San Marcos Unified, which includes Twin Oaks High.
$13,965
Per student
-15%
vs California
Avg $16,509
-16%
vs U.S.
Avg $16,593
Revenue mix
Local 36.7%
State 52.8%
Federal 10.5%
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 Twin Oaks High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| San Marcos High | Larger | Lower economic need | Higher S:T ratio |
| Mission Hills High | Larger | Lower economic need | Higher S:T ratio |
| San Elijo Middle | Larger | Lower economic need | Higher S:T ratio |
| Woodland Park Middle | Larger | Lower economic need | Higher S:T ratio |
| Double Peak | Larger | Lower economic need | Higher S:T ratio |
Comparisons are relative to Twin Oaks High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 3,067
- Students per teacher
- 24.5:1
- Resource Index
- 36/100
- Enrollment
- 2,751
- Students per teacher
- 25.7:1
- Resource Index
- 44/100
- Enrollment
- 1,395
- Students per teacher
- 23.6:1
- Resource Index
- 34/100
- Enrollment
- 1,184
- Students per teacher
- 21.9:1
- Resource Index
- 32/100
- Enrollment
- 1,171
- Students per teacher
- 21.7:1
- Resource Index
- 29/100
Similar high schools in San Marcos
4 comparable high schools (grades 9-12) serving the same city.
San Marcos High
Standard public school
3,067 students 24.5:1 students per teacher
Mission Hills High
Standard public school
2,751 students 25.7:1 students per teacher
High Tech High North County
Standard public school
409 students 20.4:1 students per teacher
Foothills High
Alternative education program
101 students 20.2:1 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 (~192 students)
Similar student-teacher ratio (~9.6:1)
Next steps
Verify locally before acting on Twin Oaks High's federal record.
- Compare Twin Oaks High against another school. Compare schools
- San Marcos Unified'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 Twin Oaks High
How many students attend Twin Oaks High?
Twin Oaks High has 192 students enrolled. It is a high school in San Marcos, CA.
What is the student-teacher ratio at Twin Oaks High?
The student-teacher ratio at Twin Oaks High is 9.6:1, which is 55% lower than the California average of 21.5:1 and 39% 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 Twin Oaks High?
61.3% of students at Twin Oaks High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Twin Oaks High?
The largest demographic group at Twin Oaks High is Hispanic or Latino at 62.5% of enrollment, in San Marcos, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 54.8/100.
What is the Resource Investment Index for Twin Oaks High?
Twin Oaks High has a Resource Investment Index of 41/100 (typical reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Twin Oaks High rank among high schools in San Marcos?
By Resource Investment Index, Twin Oaks High ranks #1 of 5 high schools in San Marcos, 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 San Marcos on the city page.
Is Twin Oaks High a good school?
Twin Oaks High earns 41/100 on the Resource Investment Index, with class sizes smaller than 96% 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 San Marcos Unified?
Besides Twin Oaks High, San Marcos Unified also operates San Marcos High (3,067 students), Mission Hills High (2,751 students), and San Elijo Middle (1,395 students). See the San Marcos Unified 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.