Enrollment
590
California · 2024-25 NCES data
Elementary school (grades K-5) · Plumas Lake, CA
Cobblestone Elementary
Federal NCES profile for Cobblestone Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 35/100.
2024-25 NCES dataElementary school (grades K-5)NCES 063118012166
👥 S:T ratio 2
🌟 Gifted program 30
📋 Attendance 73
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Cobblestone Elementary earns 35/100 on the Resource Investment Index, with class sizes larger than 76% of California schools. It is also more racially and ethnically mixed than most California schools.
- #3 of 3
- public schools in Plumas Lake · Resource Index
- 35
- Resource Index · Typical
- 24.6:1
- large classes for California
- 27.7%
- free-lunch eligible
Cobblestone Elementary has class sizes larger than 76% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Cobblestone Elementary ranks #3 of 3 public schools in Plumas Lake, CA.
School address
District: Plumas Lake Elementary · California
NCES ID 063118012166 Verify on NCES CCD record →
Teachers (FTE)
24.0
Federal CCD staff survey
Students per teacher
24.6:1
vs 21.5:1 California avg
+14% vs state
Free-lunch eligible
27.7%
vs 55.5% California avg
-50% vs state
Student-teacher ratio in context
How Cobblestone Elementary compares with California and U.S. medians
What stands out at Cobblestone Elementary
Cobblestone Elementary is a mid-sized elementary school in Plumas Lake, California, enrolling 590 students.
Class loads run somewhat heavier than typical: 24.6:1 puts it in the larger third of California schools by student-teacher ratio.
Economic need runs somewhat below the state's typical profile, with 27.7% of students eligible for free meals.
Enrollment of 590 puts it in the larger third of California schools by headcount.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 1,404 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #562.
Its student body is led by Hispanic or Latino (36%) and White (31%), more mixed than most schools in the state (diversity index 74/100).
10.8% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The surrounding Plumas Lake Elementary spends $12,951 per pupil, 22% below the California average, a leaner-resourced district than most.
Among Plumas Lake's elementary schools, it stands alongside Rio Del Oro Elementary (564 students): Cobblestone Elementary is larger than that campus by headcount and runs heavier classes (24.6:1 vs 22.6:1).
Plumas Lake Elementary also operates Rio Del Oro Elementary (564 students) and Riverside Meadows Intermediate (528 students) alongside Cobblestone Elementary.
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 Cobblestone Elementary compares
Cobblestone 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 | 24.6:1 | ▲ 14% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 27.7% | ▼ 50% | 55.5% | 51.7% |
| Enrollment | 590 | top 33% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
24.6:1
Leaner classes than 6% of US schools, heavier class loads than most.
590
Bigger than 72% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
27.7%
free-lunch eligible
- 50% 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
24.6:1
students per teacher
- 14% above state mean
Top 76% in California - lower ratio than 24% of state schools
Well above 20:1, one of the more stretched staffing loads nationally relative to enrollment.
Engagement
10.8%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Funding equity
$12,951
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
3
in-school suspensions + 11 out-of-school
Suspension rate: 0.5 per 100 students. Combined in-school and out-of-school rate: 2.4 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 36.1%
White 30.5%
Asian 15.8%
Two or More 10.7%
African American 5.6%
Native Hawaiian / Pacific Islander 1.0%
American Indian / Alaska Native 0.3%
Largest group: Hispanic or Latino at 36.1% of enrollment.
Student-body diversity index 73.7/100
Simpson diversity index - at 73.7, Cobblestone Elementary is more mixed than the California school average of 46.0.
Programs
Funding & spending
District-wide per-pupil expenditure for Plumas Lake Elementary, which includes Cobblestone Elementary.
$12,951
Per student
-22%
vs California
Avg $16,509
-22%
vs U.S.
Avg $16,593
Revenue mix
Local 30.2%
State 61.8%
Federal 8.1%
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 Cobblestone Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Rio Del Oro Elementary | Similar size | Similar economic need | Lower S:T ratio |
| Riverside Meadows Intermediate | Similar size | Similar economic need | Lower S:T ratio |
Comparisons are relative to Cobblestone Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 564
- Students per teacher
- 22.6:1
- Resource Index
- 36/100
- Enrollment
- 528
- Students per teacher
- 21.1:1
- Resource Index
- 36/100
Similar elementary schools in Plumas Lake
1 comparable elementary schools (grades K-5) serving the same city.
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 (~590 students)
Similar student-teacher ratio (~24.6:1)
Next steps
Verify locally before acting on Cobblestone Elementary's federal record.
- Compare Cobblestone Elementary against another school. Compare schools
- Plumas Lake 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 Cobblestone Elementary
How many students attend Cobblestone Elementary?
Cobblestone Elementary has 590 students enrolled. It is an elementary school in Plumas Lake, CA.
What is the student-teacher ratio at Cobblestone Elementary?
The student-teacher ratio at Cobblestone Elementary is 24.6:1, which is 14% higher than the California average of 21.5:1 and 57% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Cobblestone Elementary?
27.7% of students at Cobblestone Elementary are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Cobblestone Elementary?
The largest demographic group at Cobblestone Elementary is Hispanic or Latino at 36.1% of enrollment, in Plumas Lake, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 73.7/100.
What is the Resource Investment Index for Cobblestone Elementary?
Cobblestone Elementary has a Resource Investment Index of 35/100 (typical 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 Cobblestone Elementary rank among public schools in Plumas Lake?
By Resource Investment Index, Cobblestone Elementary ranks #3 of 3 public schools in Plumas Lake, 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 Plumas Lake on the city page.
Is Cobblestone Elementary a good school?
Cobblestone Elementary earns 35/100 on the Resource Investment Index, with class sizes larger than 76% of California schools. It is also more racially and ethnically mixed than most 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 Plumas Lake Elementary?
Besides Cobblestone Elementary, Plumas Lake Elementary also operates Rio Del Oro Elementary (564 students) and Riverside Meadows Intermediate (528 students). See the Plumas Lake 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.