Enrollment
28
California · 2024-25 NCES data
High school (grades 9-12) · Imperial, CA
Imperial Ave. Holbrook High
Federal NCES profile for Imperial Ave. Holbrook High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 27/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 061821002242
👥 S:T ratio 0
📚 AP courses 10
🌟 Gifted program 70
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Imperial Ave. Holbrook High earns 27/100 on the Resource Investment Index, with class sizes larger than 93% of California schools. It is also one of the smallest schools in California.
- #4 of 6
- public schools in Imperial · Resource Index
- 27
- Resource Index · Lower
- 28:1
- large classes for California
- 66.0%
- free-lunch eligible
Imperial Ave. Holbrook High has class sizes larger than 93% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Imperial Ave. Holbrook High ranks #4 of 6 public schools in Imperial, CA.
School address
District: Imperial Unified · California
NCES ID 061821002242 Verify on NCES CCD record →
Teachers (FTE)
1.0
Federal CCD staff survey
Students per teacher
28:1
vs 21.5:1 California avg
+30% vs state
Free-lunch eligible
66.0%
vs 55.5% California avg
+19% vs state
Student-teacher ratio in context
How Imperial Ave. Holbrook High compares with California and U.S. medians
What stands out at Imperial Ave. Holbrook High
Imperial Ave. Holbrook High is a higher-need, small high school in Imperial, California, enrolling 28 students.
Class loads run heavy: 28:1 is larger than about 93% of California schools and 30% above the 21.5:1 state mean, so each teacher carries more students than is typical.
Its free-meal eligibility rate of 66.0% 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 96% of California schools, with 28 enrolled.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 122 statewide peers matched on enrollment and economic need, it ranks mid-pack at #72.
Its student body is predominantly Hispanic or Latino (89% of enrollment), among the less diverse in the state (diversity index 19/100).
No Advanced Placement courses are reported for this campus in the federal data.
Discipline events run high: 6 in- and out-of-school suspensions were reported for 28 students in the 2021-22 Civil Rights Data Collection.
Among Imperial's high schools, it stands alongside Imperial High (1,439 students): Imperial Ave. Holbrook High is smaller than that campus by headcount and runs heavier classes (28:1 vs 24.8:1).
Imperial Unified also operates Imperial High (1,439 students) and Frank M. Wright Middle (1,116 students) alongside Imperial Ave. Holbrook 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 Imperial Ave. Holbrook High compares
Imperial Ave. Holbrook 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 | 28:1 | ▲ 30% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 66.0% | ▲ 19% | 55.5% | 51.7% |
| Enrollment | 28 | top 96% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
28:1
Leaner classes than 3% of US schools, heavier class loads than most.
28
Bigger than 3% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
66.0%
free-lunch eligible
- 19% 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
28:1
students per teacher
- 30% above state mean
Top 93% in California - lower ratio than 7% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Funding equity
$13,369
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
Counselors0.0 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 6 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 21.4 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 89.3%
White 10.7%
Largest group: Hispanic or Latino at 89.3% of enrollment.
Student-body diversity index 19.1/100
Simpson diversity index - at 19.1, Imperial Ave. Holbrook High is less 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 Imperial Unified, which includes Imperial Ave. Holbrook High.
$13,369
Per student
-19%
vs California
Avg $16,509
-19%
vs U.S.
Avg $16,593
Revenue mix
Local 21.5%
State 67.3%
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 Imperial Ave. Holbrook High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Imperial High | Larger | Lower economic need | Lower S:T ratio |
| Frank M. Wright Middle | Larger | Lower economic need | Lower S:T ratio |
| Ben Hulse Elementary | Larger | Lower economic need | Lower S:T ratio |
| Imperial Cross Elementary | Larger | Lower economic need | Lower S:T ratio |
| T. L. Waggoner Elementary | Larger | Lower economic need | Lower S:T ratio |
Comparisons are relative to Imperial Ave. Holbrook High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,439
- Students per teacher
- 24.8:1
- Resource Index
- 26/100
- Enrollment
- 1,116
- Students per teacher
- 25.4:1
- Resource Index
- 33/100
- Enrollment
- 838
- Students per teacher
- 24.6:1
- Resource Index
- 39/100
- Enrollment
- 760
- Students per teacher
- 26.2:1
- Resource Index
- 43/100
- Enrollment
- 613
- Students per teacher
- 22.7:1
- Resource Index
- 47/100
Similar high schools in Imperial
1 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 (~28 students)
Next steps
Verify locally before acting on Imperial Ave. Holbrook High's federal record.
- Compare Imperial Ave. Holbrook High against another school. Compare schools
- Imperial 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 Imperial Ave. Holbrook High
How many students attend Imperial Ave. Holbrook High?
Imperial Ave. Holbrook High has 28 students enrolled. It is a high school in Imperial, CA.
What is the student-teacher ratio at Imperial Ave. Holbrook High?
The student-teacher ratio at Imperial Ave. Holbrook High is 28:1, which is 30% higher than the California average of 21.5:1 and 78% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Imperial Ave. Holbrook High?
66.0% of students at Imperial Ave. Holbrook High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Imperial Ave. Holbrook High?
The largest demographic group at Imperial Ave. Holbrook High is Hispanic or Latino at 89.3% of enrollment, in Imperial, CA.
What is the Resource Investment Index for Imperial Ave. Holbrook High?
Imperial Ave. Holbrook High has a Resource Investment Index of 27/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Imperial Ave. Holbrook High rank among public schools in Imperial?
By Resource Investment Index, Imperial Ave. Holbrook High ranks #4 of 6 public schools in Imperial, 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 Imperial on the city page.
Is Imperial Ave. Holbrook High a good school?
Imperial Ave. Holbrook High earns 27/100 on the Resource Investment Index, with class sizes larger than 93% of California schools. It is also one of the smallest schools in California. 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 Imperial Unified?
Besides Imperial Ave. Holbrook High, Imperial Unified also operates Imperial High (1,439 students), Frank M. Wright Middle (1,116 students), and Ben Hulse Elementary (838 students). See the Imperial 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.