Enrollment
207
California · 2024-25 NCES data
Middle school (grades 6-8) · Sebastopol, CA
Twin Hills Charter Middle
Federal NCES profile for Twin Hills Charter Middle, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 40/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 064023006653Charter school
👥 S:T ratio 31
🌟 Gifted program 30
🎓 Counselors 59
📋 Attendance 40
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Twin Hills Charter Middle earns 40/100 on the Resource Investment Index, with class sizes smaller than 82% of California schools.
- #5 of 14
- public schools in Sebastopol · Resource Index
- 40
- Resource Index · Typical
- 17.3:1
- small classes for California
- 24.5%
- free-lunch eligible
Twin Hills Charter Middle has class sizes smaller than 82% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Twin Hills Charter Middle ranks #5 of 14 public schools in Sebastopol, CA.
School address
District: Twin Hills Union Elementary · California
NCES ID 064023006653 Verify on NCES CCD record →
Teachers (FTE)
12.0
Federal CCD staff survey
Students per teacher
17.3:1
vs 21.5:1 California avg
-20% vs state
Free-lunch eligible
24.5%
vs 55.5% California avg
-56% vs state
Student-teacher ratio in context
How Twin Hills Charter Middle compares with California and U.S. medians
What stands out at Twin Hills Charter Middle
Twin Hills Charter Middle is a mid-sized charter middle school in Sebastopol, California, enrolling 207 students.
Class sizes run a bit leaner than typical: 17.3:1 puts it in the smaller third of California schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 24.5% of students eligible for free meals.
Enrollment of 207 puts it in the smaller third of California schools by headcount.
Its Resource Investment Index lands in the upper third of 9,998 scored California schools.
Against 252 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #67.
Its student body is led by White (59%) and Hispanic or Latino (25%) (diversity index 57/100).
Counselor coverage is strong, about 207 students per counselor, inside the American School Counselor Association's recommended 250:1.
Attendance runs somewhat below the norm, with 24.2% of students chronically absent per the 2021-22 civil-rights collection.
Among Sebastopol's middle schools, it stands alongside Hillcrest Middle (297 students): Twin Hills Charter Middle is smaller than that campus by headcount and runs leaner classes (17.3:1 vs 18.6:1).
Twin Hills Union Elementary also operates Apple Blossom (305 students) and Sunridge Charter (256 students) alongside Twin Hills Charter Middle.
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 Hills Charter Middle compares
Twin Hills Charter Middle on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 17.3:1 | ▼ 20% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 24.5% | ▼ 56% | 55.5% | 51.7% |
| Enrollment | 207 | top 82% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
17.3:1
Leaner classes than 29% of US schools, heavier class loads than most.
207
Bigger than 20% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
24.5%
free-lunch eligible
- 56% below the California average of 55.5%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
17.3:1
students per teacher
- 20% below state mean
Top 18% in California - lower ratio than 82% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
24.2%
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
$14,548
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 207 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 11 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 5.3 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
White 58.8%
Hispanic or Latino 24.5%
Two or More 15.2%
Asian 1.0%
African American 0.5%
Largest group: White at 58.8% of enrollment.
Student-body diversity index 57.1/100
Simpson diversity index - at 57.1, Twin Hills Charter Middle is more mixed than the California school average of 46.0.
Programs
Funding & spending
District-wide per-pupil expenditure for Twin Hills Union Elementary, which includes Twin Hills Charter Middle.
$14,548
Per student
-12%
vs California
Avg $16,509
-12%
vs U.S.
Avg $16,593
Revenue mix
Local 43.1%
State 53.5%
Federal 3.3%
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 Hills Charter Middle Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Apple Blossom | Larger | Similar economic need | Higher S:T ratio |
| Sunridge Charter | Similar size | Similar economic need | Higher S:T ratio |
| Orchard View | Similar size | Similar economic need | Similar S:T ratio |
Comparisons are relative to Twin Hills Charter Middle's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 305
- Students per teacher
- 21.8:1
- Resource Index
- 14/100
- Enrollment
- 256
- Students per teacher
- 25.6:1
- Resource Index
- 20/100
- Enrollment
- 224
- Students per teacher
- 17.2:1
- Resource Index
- 31/100
Similar middle schools in Sebastopol
1 comparable middle schools (grades 6-8) serving the same city.
Similar middle 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 (~207 students)
Similar student-teacher ratio (~17.3:1)
Next steps
Verify locally before acting on Twin Hills Charter Middle's federal record.
- Compare Twin Hills Charter Middle against another school. Compare schools
- Twin Hills Union Elementary'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 Hills Charter Middle
How many students attend Twin Hills Charter Middle?
Twin Hills Charter Middle has 207 students enrolled. It is a middle school in Sebastopol, CA.
What is the student-teacher ratio at Twin Hills Charter Middle?
The student-teacher ratio at Twin Hills Charter Middle is 17.3:1, which is 20% lower than the California average of 21.5:1 and 10% 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 Twin Hills Charter Middle?
24.5% of students at Twin Hills Charter Middle are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Twin Hills Charter Middle?
The largest demographic group at Twin Hills Charter Middle is White at 58.8% of enrollment, in Sebastopol, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 57.1/100.
What is the Resource Investment Index for Twin Hills Charter Middle?
Twin Hills Charter Middle has a Resource Investment Index of 40/100 (typical 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 Twin Hills Charter Middle rank among public schools in Sebastopol?
By Resource Investment Index, Twin Hills Charter Middle ranks #5 of 14 public schools in Sebastopol, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in Sebastopol on the city page.
Is Twin Hills Charter Middle a good school?
Twin Hills Charter Middle earns 40/100 on the Resource Investment Index, with class sizes smaller than 82% 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 Twin Hills Union Elementary?
Besides Twin Hills Charter Middle, Twin Hills Union Elementary also operates Apple Blossom (305 students), Sunridge Charter (256 students), and Orchard View (224 students). See the Twin Hills Union Elementary 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.