Enrollment
332
California · 2024-25 NCES data
Elementary school (grades K-5) · Brentwood, CA
Old River Elementary
Federal NCES profile for Old River Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 27/100.
2024-25 NCES dataElementary school (grades K-5)NCES 062004014006
👥 S:T ratio 5
🌟 Gifted program 30
📋 Attendance 45
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Old River Elementary earns 27/100 on the Resource Investment Index, with class sizes near the California median.
- #4 of 9
- elementary schools in Brentwood · Resource Index
- 27
- Resource Index · Lower
- 23.7:1
- students per teacher
- 14.4%
- free-lunch eligible
Old River Elementary has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Old River Elementary ranks #4 of 9 elementary schools in Brentwood, CA.
School address
District: Knightsen Elementary · California
NCES ID 062004014006 Verify on NCES CCD record →
Teachers (FTE)
14.0
Federal CCD staff survey
Students per teacher
23.7:1
vs 21.5:1 California avg
+10% vs state
Free-lunch eligible
14.4%
vs 55.5% California avg
-74% vs state
Student-teacher ratio in context
How Old River Elementary compares with California and U.S. medians
What stands out at Old River Elementary
Old River Elementary is a lower-poverty, mid-sized elementary school in Brentwood, California, enrolling 332 students.
Class loads run somewhat heavier than typical: 23.7:1 puts it in the larger third of California schools by student-teacher ratio.
Comparatively few students face economic hardship here, 14.4% free-meal eligibility runs 74% below the California average.
Enrollment of 332 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.
Among 560 similarly sized, similarly resourced-need California schools statewide, it ranks #465, in the lower tier once campus size and economic need are matched.
Its student body is led by White (46%) and Hispanic or Latino (38%) (diversity index 64/100).
Attendance runs somewhat below the norm, with 22.0% of students chronically absent per the 2021-22 civil-rights collection.
The surrounding Knightsen Elementary spends $12,284 per pupil, 26% below the California average, a leaner-resourced district than most.
Among Brentwood's elementary schools, it stands alongside R. Paul Krey Elementary (885 students): Old River Elementary is smaller than that campus by headcount and runs leaner classes (23.7:1 vs 27.7:1).
Its district, Knightsen Elementary, also runs Knightsen Elementary (316 students).
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 Old River Elementary compares
Old River Elementary on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 23.7:1 | ▲ 10% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 14.4% | ▼ 74% | 55.5% | 51.7% |
| Enrollment | 332 | top 70% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
23.7:1
Leaner classes than 7% of US schools, heavier class loads than most.
332
Bigger than 37% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
14.4%
free-lunch eligible
- 74% 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
23.7:1
students per teacher
- 10% above state mean
Top 69% in California - lower ratio than 31% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
22.0%
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
$12,284
per pupil, district-wide
- below California avg of $16,509
Well below the U.S. average per-pupil spend, a notably leaner funding position that 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: 1.8 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 46.1%
Hispanic or Latino 37.7%
Two or More 7.5%
Asian 4.8%
African American 3.0%
Native Hawaiian / Pacific Islander 0.9%
Largest group: White at 46.1% of enrollment.
Student-body diversity index 63.6/100
Simpson diversity index - at 63.6, Old River Elementary is more mixed than the California school average of 46.0.
Programs
Funding & spending
District-wide per-pupil expenditure for Knightsen Elementary, which includes Old River Elementary.
$12,284
Per student
-26%
vs California
Avg $16,509
-26%
vs U.S.
Avg $16,593
Revenue mix
Local 45.0%
State 45.9%
Federal 9.1%
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 Old River Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Knightsen Elementary | Similar size | Higher economic need | Similar S:T ratio |
Comparisons are relative to Old River Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 316
- Students per teacher
- 24.3:1
- Resource Index
- 25/100
Similar elementary schools in Brentwood
6 comparable elementary schools (grades K-5) serving the same city.
R. Paul Krey Elementary
Standard public school
885 students 27.7:1 students per teacher
Pioneer Elementary
Standard public school
859 students 24.5:1 students per teacher
Brentwood Elementary
Standard public school
811 students 26.2:1 students per teacher
Garin Elementary
Standard public school
785 students 27.1:1 students per teacher
Loma Vista Elementary
Standard public school
749 students 31.2:1 students per teacher
Ron Nunn Elementary
Standard public school
702 students 28.1:1 students per teacher
Similar elementary 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 (~332 students)
Next steps
Verify locally before acting on Old River Elementary's federal record.
- Compare Old River Elementary against another school. Compare schools
- Knightsen 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 Old River Elementary
How many students attend Old River Elementary?
Old River Elementary has 332 students enrolled. It is an elementary school in Brentwood, CA.
What is the student-teacher ratio at Old River Elementary?
The student-teacher ratio at Old River Elementary is 23.7:1, which is 10% higher than the California average of 21.5:1 and 51% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Old River Elementary?
14.4% of students at Old River Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Old River Elementary?
The largest demographic group at Old River Elementary is White at 46.1% of enrollment, in Brentwood, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 63.6/100.
What is the Resource Investment Index for Old River Elementary?
Old River Elementary has a Resource Investment Index of 27/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Old River Elementary rank among elementary schools in Brentwood?
By Resource Investment Index, Old River Elementary ranks #4 of 9 elementary schools in Brentwood, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Brentwood on the city page.
Is Old River Elementary a good school?
Old River Elementary earns 27/100 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 Knightsen Elementary?
Besides Old River Elementary, Knightsen Elementary also operates Knightsen Elementary (316 students). See the Knightsen 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.