- Enrollment
- 1,948
- Students per teacher
- 25:1
- Resource Index
- 21/100
Other / mixed grade configuration · Concord, CA
Glenbrook Academy
Federal NCES profile for Glenbrook Academy, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 29/100.
2024-25 NCES dataOther / mixed grade configurationNCES 062637014515
👥 S:T ratio 58
🌟 Gifted program 30
📋 Attendance 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Glenbrook Academy earns 29/100 on the Resource Investment Index, even as it posts class sizes smaller than 95% of California schools. It is also one of the smallest schools in California.
- #3 of 3
- schools in Concord · Resource Index
- 29
- Resource Index · Lower
- 10.5:1
- small classes for California
- 60.0%
- free-lunch eligible
Glenbrook Academy has class sizes smaller than 95% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Glenbrook Academy ranks #3 of 3 schools in Concord, CA.
School address
District: Mt. Diablo Unified · California
NCES ID 062637014515 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
+1 students YoY
Glenbrook Academy grew from 15 students in 2022-23 to 16 in 2023-24 (+6.7%).
Teacher FTE held 2.0 → 2.0 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Growing CCD campus
+1 students YoY 062637014515 · Concord, CA Other · SMALL · TRAD
21 enr · 10.5:1 · 60.0% lunch · RII 29
Nearest enrollment peer: College Park High (1,948 students)
Glenbrook Academy grew from 15 students in 2022-23 to 16 in 2023-24 (+6.7%). Teacher FTE held 2.0 → 2.0 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
Glenbrook Academy in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- College Park H
College Park High
1,948 students
- Northgate High
Northgate High
1,546 students
- Mt. Diablo Hig
Mt. Diablo High
1,397 students
- Concord High
Concord High
1,137 students
- Ygnacio Valley
Ygnacio Valley High
1,059 students
- This school 21
Glenbrook Academy
21 students
What this shows Glenbrook Academy reports 21 students on the CCD universe file.
How Glenbrook Academy compares
Glenbrook Academy is a growing campus on CCD: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 10.5:1 | ▼ 51% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 60.0% | ▲ 8% | 55.5% | 51.7% |
| Enrollment | 21 | top 97% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
10.5:1
Leaner classes than 86% of US schools, among the more generously staffed nationally.
21
Bigger than 3% of US schools by enrollment, a small campus.
Equity indicators methodology
Economic need
60.0%
free-lunch eligible
- 8% 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
10.5:1
students per teacher
- 51% below state mean
Top 5% in California - lower ratio than 95% of state schools
Well under the widely cited 15:1 individualized-attention benchmark, among the leaner class loads nationally.
Engagement
66.7%
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
$15,273
per pupil, district-wide
- below California avg of $18,665
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
2
in-school suspensions + 10 out-of-school
Suspension rate: 9.5 per 100 students. Combined in-school and out-of-school rate: 57.1 per 100 students. Reported via the Civil Rights Data Collection.
Student demographics
Hispanic or Latino 52.4%
White 28.6%
African American 9.5%
Two or More 9.5%
Largest group: Hispanic or Latino at 52.4% of enrollment.
Student-body diversity index 62.6/100
Simpson diversity index - at 62.6, Glenbrook Academy is more mixed than the California school average of 46.0.
Programs
District finance for Mt. Diablo Unified reports $15,273 per pupil (NCES F-33) - open the district page for the full revenue mix.
How Glenbrook Academy Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| College Park High | Larger | Lower economic need | Higher S:T ratio |
| Northgate High | Larger | Lower economic need | Higher S:T ratio |
| Mt. Diablo High | Larger | Similar economic need | Higher S:T ratio |
| Concord High | Larger | Lower economic need | Higher S:T ratio |
| Ygnacio Valley High | Larger | Higher economic need | Higher S:T ratio |
Comparisons are relative to Glenbrook Academy's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,546
- Students per teacher
- 24.9:1
- Resource Index
- 23/100
- Enrollment
- 1,397
- Students per teacher
- 17.7:1
- Resource Index
- 22/100
- Enrollment
- 1,137
- Students per teacher
- 18.6:1
- Resource Index
- 27/100
- Enrollment
- 1,059
- Students per teacher
- 17.4:1
- Resource Index
- 26/100
Similar other schools in Concord
2 comparable other schools (grades Mixed) serving the same city.
Nationwide other schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~21 students)
Frequently asked questions about Glenbrook Academy
How many students attend Glenbrook Academy?
Glenbrook Academy has 21 students enrolled. It is a special-education school in Concord, CA. CCD year-over-year: 15 (2022-23) → 16 (2023-24), up 1.
What is the student-teacher ratio at Glenbrook Academy?
The student-teacher ratio at Glenbrook Academy is 10.5:1, which is 51% lower than the California average of 21.5:1 and 33% 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 Glenbrook Academy?
60.0% of students at Glenbrook Academy are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Glenbrook Academy?
The largest demographic group at Glenbrook Academy is Hispanic or Latino at 52.4% of enrollment, in Concord, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 62.6/100.
What is the Resource Investment Index for Glenbrook Academy?
Glenbrook Academy has a Resource Investment Index of 29/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, gifted-program reporting, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Glenbrook Academy rank among schools in Concord?
By Resource Investment Index, Glenbrook Academy ranks #3 of 3 schools in Concord, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Concord on the city page.
What other schools are in Mt. Diablo Unified?
Besides Glenbrook Academy, Mt. Diablo Unified also operates College Park High (1,948 students), Northgate High (1,546 students), and Mt. Diablo High (1,397 students). See the Mt. Diablo Unified district page for the complete list.