Enrollment
255
California · 2024-25 NCES data
Elementary school (grades K-5) · Encinitas, CA
Jcs - Mountain Oaks
Federal NCES profile for Jcs - Mountain Oaks, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 30/100.
2024-25 NCES dataElementary school (grades K-5)NCES 060192914231Charter school
👥 S:T ratio 0
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 91
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Jcs - Mountain Oaks earns 30/100 on the Resource Investment Index, with class sizes larger than 93% of California schools.
- #3 of 6
- elementary schools in Encinitas · Resource Index
- 30
- Resource Index · Lower
- 28.3:1
- large classes for California
- 13.9%
- free-lunch eligible
Jcs - Mountain Oaks has class sizes larger than 93% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Jcs - Mountain Oaks ranks #3 of 6 elementary schools in Encinitas, CA.
School address
District: Jcs - Mountain Oaks District · California
NCES ID 060192914231 Verify on NCES CCD record →
Teachers (FTE)
9.0
Federal CCD staff survey
Students per teacher
28.3:1
vs 21.5:1 California avg
+32% vs state
Free-lunch eligible
13.9%
vs 55.5% California avg
-75% vs state
Student-teacher ratio in context
How Jcs - Mountain Oaks compares with California and U.S. medians
What stands out at Jcs - Mountain Oaks
Jcs - Mountain Oaks is a lower-poverty, mid-sized charter elementary school in Encinitas, California, enrolling 255 students.
Class loads run heavy: 28.3:1 is larger than about 93% of California schools and 32% above the 21.5:1 state mean, so each teacher carries more students than is typical.
Comparatively few students face economic hardship here, 13.9% free-meal eligibility runs 75% below the California average.
Enrollment of 255 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 260 similarly sized, similarly resourced-need California schools statewide, it ranks #186, in the lower tier once campus size and economic need are matched.
Its student body is led by White (65%) and Hispanic or Latino (13%) (diversity index 54/100).
Counselor access is stretched at roughly 1275 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Attendance holds up well here: only 3.5% of students were chronically absent, below the typical post-pandemic national figure.
The surrounding Jcs - Mountain Oaks District spends $12,395 per pupil, 25% below the California average, a leaner-resourced district than most.
Among Encinitas's elementary schools, it stands alongside Capri Elementary (613 students): Jcs - Mountain Oaks is smaller than that campus by headcount and runs heavier classes (28.3:1 vs 21.9:1).
Jcs - Mountain Oaks District is a single-school charter district, so Jcs - Mountain Oaks operates independently rather than alongside district-mates.
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 Jcs - Mountain Oaks compares
Jcs - Mountain Oaks on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 28.3:1 | ▲ 32% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 13.9% | ▼ 75% | 55.5% | 51.7% |
| Enrollment | 255 | top 79% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
28.3:1
Leaner classes than 2% of US schools, heavier class loads than most.
255
Bigger than 26% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
13.9%
free-lunch eligible
- 75% 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
28.3:1
students per teacher
- 32% 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.
Engagement
3.5%
chronically absent (missed 10%+ of school days)
Below 5%, comfortably under the pre-pandemic national baseline for chronic absenteeism.
Funding equity
$12,395
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
Counselors0.2 FTE
Student-support staffing from the Civil Rights Data Collection.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 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 64.7%
Hispanic or Latino 12.9%
Two or More 12.5%
Asian 8.6%
African American 0.8%
American Indian / Alaska Native 0.4%
Largest group: White at 64.7% of enrollment.
Student-body diversity index 54.2/100
Simpson diversity index - at 54.2, Jcs - Mountain Oaks is more mixed than the California school average of 46.0.
Programs
Funding & spending
District-wide per-pupil expenditure for Jcs - Mountain Oaks District, which includes Jcs - Mountain Oaks.
$12,395
Per student
-25%
vs California
Avg $16,509
-25%
vs U.S.
Avg $16,593
Revenue mix
Local 20.2%
State 77.7%
Federal 2.0%
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.
Similar elementary schools in Encinitas
5 comparable elementary schools (grades K-5) serving the same city.
Capri Elementary
Standard public school
613 students 21.9:1 students per teacher
Paul Ecke-Central Elementary
Standard public school
569 students 21.1:1 students per teacher
Ocean Knoll Elementary
Standard public school
479 students 21.8:1 students per teacher
Park Dale Lane Elementary
Standard public school
424 students 20.2:1 students per teacher
Flora Vista Elementary
Standard public school
377 students 20.9:1 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 (~255 students)
Similar student-teacher ratio (~28.3:1)
Next steps
Verify locally before acting on Jcs - Mountain Oaks's federal record.
- Compare Jcs - Mountain Oaks against another school. Compare schools
- Jcs - Mountain Oaks District'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 Jcs - Mountain Oaks
How many students attend Jcs - Mountain Oaks?
Jcs - Mountain Oaks has 255 students enrolled. It is an elementary school in Encinitas, CA.
What is the student-teacher ratio at Jcs - Mountain Oaks?
The student-teacher ratio at Jcs - Mountain Oaks is 28.3:1, which is 32% higher than the California average of 21.5:1 and 80% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Jcs - Mountain Oaks?
13.9% of students at Jcs - Mountain Oaks are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Jcs - Mountain Oaks?
The largest demographic group at Jcs - Mountain Oaks is White at 64.7% of enrollment, in Encinitas, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 54.2/100.
What is the Resource Investment Index for Jcs - Mountain Oaks?
Jcs - Mountain Oaks 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 Jcs - Mountain Oaks rank among elementary schools in Encinitas?
By Resource Investment Index, Jcs - Mountain Oaks ranks #3 of 6 elementary schools in Encinitas, 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 Encinitas on the city page.
Is Jcs - Mountain Oaks a good school?
Jcs - Mountain Oaks earns 30/100 on the Resource Investment Index, with class sizes larger than 93% of 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 Jcs - Mountain Oaks District?
None; Jcs - Mountain Oaks District is a single-school charter district, and Jcs - Mountain Oaks is its only campus.
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.