Enrollment
334
California · 2024-25 NCES data
Middle school (grades 6-8) · Sonoma, CA
Adele Harrison Middle
Federal NCES profile for Adele Harrison Middle, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 30/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 063720010436
👥 S:T ratio 22
🌟 Gifted program 70
🎓 Counselors 0
📋 Attendance 28
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Adele Harrison Middle earns 30/100 on the Resource Investment Index, with class sizes near the California median.
- #4 of 10
- public schools in Sonoma · Resource Index
- 30
- Resource Index · Lower
- 19.6:1
- students per teacher
- 34.0%
- free-lunch eligible
Adele Harrison Middle has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Adele Harrison Middle ranks #4 of 10 public schools in Sonoma, CA.
School address
District: Sonoma Valley Unified · California
NCES ID 063720010436 Verify on NCES CCD record →
Teachers (FTE)
17.0
Federal CCD staff survey
Students per teacher
19.6:1
vs 21.5:1 California avg
-9% vs state
Free-lunch eligible
34.0%
vs 55.5% California avg
-39% vs state
Student-teacher ratio in context
How Adele Harrison Middle compares with California and U.S. medians
What stands out at Adele Harrison Middle
Adele Harrison Middle is a mid-sized middle school in Sonoma, California, enrolling 334 students.
Class sizes run a bit leaner than typical: 19.6:1 puts it in the smaller third of California schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 34.0% of students eligible for free meals.
Enrollment of 334 puts it in the smaller third of California schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 845 statewide peers matched on enrollment and economic need, it ranks mid-pack at #454.
Its student body is led by Hispanic or Latino (56%) and White (40%) (diversity index 52/100).
Counselor access is stretched at roughly 1670 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Chronic absenteeism is elevated: 29.0% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The surrounding Sonoma Valley Unified spends $21,339 per pupil, 29% above the California average, a better-resourced district than most.
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
Among Sonoma's middle schools, it stands alongside Altimira Middle (324 students): Adele Harrison Middle is larger than that campus by headcount and runs heavier classes (19.6:1 vs 15.4:1).
Sonoma Valley Unified also operates Sonoma Valley High (1,071 students) and Flowery Elementary (368 students) alongside Adele Harrison 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 Adele Harrison Middle compares
Adele Harrison 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 | 19.6:1 | ▼ 9% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 34.0% | ▼ 39% | 55.5% | 51.7% |
| Enrollment | 334 | top 70% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
19.6:1
Leaner classes than 17% of US schools, heavier class loads than most.
334
Bigger than 37% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
34.0%
free-lunch eligible
- 39% 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
19.6:1
students per teacher
- 9% below state mean
Top 32% in California - lower ratio than 68% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
29.0%
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
$21,339
per pupil, district-wide
- above California avg of $16,509
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors0.2 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 31 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 9.3 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
Hispanic or Latino 56.3%
White 40.4%
Asian 1.5%
Two or More 1.2%
American Indian / Alaska Native 0.3%
Native Hawaiian / Pacific Islander 0.3%
Largest group: Hispanic or Latino at 56.3% of enrollment.
Student-body diversity index 51.9/100
Simpson diversity index - at 51.9, Adele Harrison Middle is more mixed than the California school average of 46.0.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Sonoma Valley Unified, which includes Adele Harrison Middle.
$21,339
Per student
+29%
vs California
Avg $16,509
+29%
vs U.S.
Avg $16,593
Revenue mix
Local 74.2%
State 14.7%
Federal 11.2%
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 Adele Harrison Middle Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Sonoma Valley High | Larger | Similar economic need | Similar S:T ratio |
| Flowery Elementary | Similar size | Similar economic need | Higher S:T ratio |
| Altimira Middle | Similar size | Higher economic need | Lower S:T ratio |
| El Verano Elementary | Similar size | Higher economic need | Higher S:T ratio |
| Sassarini Elementary | Similar size | Higher economic need | Higher S:T ratio |
Comparisons are relative to Adele Harrison Middle's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,071
- Students per teacher
- 20.6:1
- Resource Index
- 36/100
- Enrollment
- 368
- Students per teacher
- 24.5:1
- Resource Index
- 11/100
- Enrollment
- 324
- Students per teacher
- 15.4:1
- Resource Index
- 45/100
- Enrollment
- 314
- Students per teacher
- 26.2:1
- Resource Index
- 7/100
- Enrollment
- 281
- Students per teacher
- 21.6:1
- Resource Index
- 19/100
Similar middle schools in Sonoma
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 (~334 students)
Similar student-teacher ratio (~19.6:1)
Next steps
Verify locally before acting on Adele Harrison Middle's federal record.
- Compare Adele Harrison Middle against another school. Compare schools
- Sonoma Valley 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 Adele Harrison Middle
How many students attend Adele Harrison Middle?
Adele Harrison Middle has 334 students enrolled. It is a middle school in Sonoma, CA.
What is the student-teacher ratio at Adele Harrison Middle?
The student-teacher ratio at Adele Harrison Middle is 19.6:1, which is 9% lower than the California average of 21.5:1 and 25% 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 Adele Harrison Middle?
34.0% of students at Adele Harrison Middle are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Adele Harrison Middle?
The largest demographic group at Adele Harrison Middle is Hispanic or Latino at 56.3% of enrollment, in Sonoma, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 51.9/100.
What is the Resource Investment Index for Adele Harrison Middle?
Adele Harrison Middle has a Resource Investment Index of 30/100 (lower 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 Adele Harrison Middle rank among public schools in Sonoma?
By Resource Investment Index, Adele Harrison Middle ranks #4 of 10 public schools in Sonoma, 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 Sonoma on the city page.
Is Adele Harrison Middle a good school?
Adele Harrison Middle earns 30/100 on the Resource Investment Index, with class sizes near the California median. 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 Sonoma Valley Unified?
Besides Adele Harrison Middle, Sonoma Valley Unified also operates Sonoma Valley High (1,071 students), Flowery Elementary (368 students), and Altimira Middle (324 students). See the Sonoma Valley 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.